:root {
  color-scheme: light;
  --ink: #15252d;
  --ink-2: #344851;
  --on-accent: #ffffff;
  --muted: #556870;
  --paper: #f5f3ec;
  --surface: #fffdf7;
  --surface-2: #ebe8df;
  --line: #d8d5ca;
  --line-strong: #aeb8b8;
  --teal: #087d79;
  --teal-dark: #065e5b;
  --teal-soft: #d9efea;
  --coral: #e55c45;
  --coral-dark: #ae3b2c;
  --coral-soft: #ffe3d9;
  --gold: #805915;
  --gold-soft: #f5e7c2;
  --blue: #426987;
  --blue-soft: #ddeaf3;
  --violet: #705c91;
  --violet-soft: #e9e1f2;
  --green: #4b7450;
  --green-soft: #dfeadd;
  --danger: #a4382c;
  --danger-soft: #fbe0da;
  --shadow: 0 18px 55px rgba(26, 43, 48, .08);
  --shadow-small: 0 8px 24px rgba(26, 43, 48, .08);
  --radius: 18px;
  --radius-small: 10px;
  --max: 1240px;
  --reading: 760px;
  --header-height: 72px;
  --safe-top: 0px;
  --font-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: Iowan Old Style, Charter, "Bitstream Charter", Georgia, serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --ink: #edf4f1;
  --ink-2: #c3d2d0;
  --on-accent: #132228;
  --muted: #94a8a8;
  --paper: #0c171c;
  --surface: #132228;
  --surface-2: #1b2e34;
  --line: #2c4146;
  --line-strong: #496066;
  --teal: #54c7bb;
  --teal-dark: #85ddd4;
  --teal-soft: #173a39;
  --coral: #ff806b;
  --coral-dark: #ffa291;
  --coral-soft: #482821;
  --gold: #e2ae4e;
  --gold-soft: #44391f;
  --blue: #7eacd1;
  --blue-soft: #253b4c;
  --violet: #baa2dc;
  --violet-soft: #372e47;
  --green: #8dbc92;
  --green-soft: #263d2a;
  --danger: #ff8b78;
  --danger-soft: #4b2823;
  --shadow: 0 18px 55px rgba(0, 0, 0, .28);
  --shadow-small: 0 8px 24px rgba(0, 0, 0, .25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + var(--safe-top) + 30px); }
body { margin: 0; min-height: 100vh; background: var(--paper); color: var(--ink); font-family: var(--font-sans); font-size: 16px; line-height: 1.6; text-rendering: optimizeLegibility; }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; opacity: .3; background-image: radial-gradient(circle at 15% 5%, color-mix(in srgb, var(--teal) 10%, transparent) 0, transparent 30%), radial-gradient(circle at 95% 12%, color-mix(in srgb, var(--coral) 8%, transparent) 0, transparent 26%); z-index: -1; }
img, svg { max-width: 100%; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: var(--teal-dark); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--teal); }
button { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.14; letter-spacing: -.025em; }
h1 { font-family: var(--font-serif); font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 650; }
h2 { font-family: var(--font-serif); font-size: clamp(1.65rem, 3vw, 2.5rem); font-weight: 650; }
h3 { font-size: 1.05rem; }
code, pre, kbd { font-family: var(--font-mono); }
code { padding: .12em .35em; border-radius: 4px; background: var(--surface-2); font-size: .88em; }
kbd { display: inline-flex; min-width: 1.6em; min-height: 1.6em; align-items: center; justify-content: center; padding: 0 .35em; border: 1px solid var(--line-strong); border-bottom-width: 2px; border-radius: 5px; background: var(--surface); font-size: .72rem; font-weight: 700; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--coral-dark); outline-offset: 3px; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 1000; transform: translateY(-150%); padding: .65rem 1rem; background: var(--ink); color: var(--surface); border-radius: 7px; }
.skip-link:focus { transform: none; }
.muted { color: var(--muted); }
.eyebrow { margin: 0 0 .55rem; color: var(--teal-dark); font-size: .72rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-small); }
.page-shell { width: min(calc(100% - 36px), var(--max)); margin-inline: auto; padding: clamp(36px, 6vw, 78px) 0 90px; }
.narrow-shell { max-width: 920px; }
.page-heading { margin-bottom: clamp(28px, 5vw, 58px); }
.page-heading h1 { margin-bottom: .7rem; }
.page-heading p:not(.eyebrow) { max-width: 720px; color: var(--ink-2); font-size: 1.08rem; }
.split-heading { display: flex; gap: 35px; align-items: flex-end; justify-content: space-between; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 25px; margin-bottom: 24px; }
.section-heading h2, .section-heading h3 { margin-bottom: .35rem; }
.section-heading > a { white-space: nowrap; }
.full-span { grid-column: 1 / -1; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; min-height: var(--header-height); padding-top: var(--safe-top); border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent); background: color-mix(in srgb, var(--paper) 90%, transparent); backdrop-filter: blur(18px); }
.header-inner { width: min(calc(100% - 32px), 1380px); min-height: var(--header-height); margin: auto; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); text-decoration: none; flex: 0 0 auto; }
.brand img { filter: drop-shadow(0 5px 8px rgba(8, 125, 121, .16)); }
.brand span { display: grid; line-height: 1.05; }
.brand strong { letter-spacing: .04em; }
.brand small { margin-top: 3px; color: var(--muted); font-size: .64rem; text-transform: uppercase; letter-spacing: .12em; }
.primary-nav { display: flex; gap: 4px; align-items: center; margin-left: auto; }
.primary-nav a { padding: .55rem .72rem; border-radius: 7px; color: var(--ink-2); font-size: .88rem; font-weight: 650; text-decoration: none; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { background: var(--surface); color: var(--ink); }
.primary-nav a[aria-current="page"] { box-shadow: inset 0 -2px var(--coral); }
.header-actions { display: flex; align-items: center; gap: 5px; border-left: 1px solid var(--line); padding-left: 13px; }
.icon-button { display: inline-grid; place-items: center; min-width: 38px; min-height: 38px; border: 0; border-radius: 8px; background: transparent; color: var(--ink); text-decoration: none; cursor: pointer; }
.icon-button:hover { background: var(--surface-2); }
.avatar-link { display: grid; place-items: center; width: 36px; height: 36px; margin-left: 4px; border-radius: 50%; background: var(--ink); color: var(--surface); font-weight: 800; text-decoration: none; }
.nav-toggle { display: none; margin-left: auto; }
.reading-progress { position: absolute; bottom: -1px; left: 0; width: 100%; height: 2px; overflow: hidden; }
.reading-progress progress { display: block; width: 100%; height: 2px; appearance: none; border: 0; background: transparent; }
.reading-progress progress::-webkit-progress-bar { background: transparent; }
.reading-progress progress::-webkit-progress-value { background: var(--coral); }
.reading-progress progress::-moz-progress-bar { background: var(--coral); }

/* Controls */
.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: .45rem; padding: .68rem 1.05rem; border: 1px solid var(--line-strong); border-radius: 9px; background: var(--surface); color: var(--ink); font-weight: 760; line-height: 1.1; text-decoration: none; cursor: pointer; transition: transform .16s ease, box-shadow .16s ease, background .16s ease; }
.button:hover:not(:disabled) { transform: translateY(-1px); box-shadow: var(--shadow-small); color: var(--ink); }
.button:active:not(:disabled) { transform: translateY(0); }
.button:disabled { opacity: .48; cursor: not-allowed; }
.button-primary { border-color: var(--teal-dark); background: var(--teal-dark); color: var(--on-accent); }
.button-primary:hover:not(:disabled) { background: var(--teal); color: var(--on-accent); }
.button-quiet { background: transparent; }
.button-danger { border-color: var(--danger); background: var(--danger); color: var(--on-accent); }
.button-danger:hover:not(:disabled) { color: var(--on-accent); background: var(--coral-dark); }
.button-wide { width: 100%; }
.button-small { min-height: 36px; padding: .48rem .75rem; font-size: .84rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; }
.link-button { appearance: none; padding: 0; border: 0; background: none; color: var(--teal-dark); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.form-stack { display: grid; gap: 17px; }
.form-stack label, .settings-card label, .notes-section label { display: grid; gap: 6px; font-weight: 700; }
.form-stack label > span, label > span { font-size: .86rem; }
input, select, textarea { width: 100%; min-height: 44px; padding: .68rem .8rem; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface); color: var(--ink); }
textarea { resize: vertical; min-height: 110px; line-height: 1.5; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: 1; }
input:focus, select:focus, textarea:focus { border-color: var(--teal); outline: 3px solid var(--coral-dark); }
.check-row { display: flex !important; align-items: flex-start; gap: 10px; cursor: pointer; font-weight: 500 !important; }
.check-row input { flex: 0 0 auto; width: 20px; height: 20px; min-height: 0; margin-top: 2px; accent-color: var(--teal); }
.form-message { min-height: 1.4em; margin: 0; color: var(--muted); font-size: .9rem; }
.form-message.is-error { color: var(--danger); }
.form-message.is-success { color: var(--green); }
.form-help { padding: .7rem .85rem; border-left: 3px solid var(--blue); background: var(--blue-soft); color: var(--ink-2); font-size: .9rem; }
.segmented { display: inline-flex; padding: 3px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface-2); }
.segmented button { min-height: 34px; padding: .35rem .7rem; border: 0; border-radius: 6px; background: transparent; cursor: pointer; }
.segmented button.is-active { background: var(--surface); color: var(--ink); box-shadow: 0 1px 6px rgba(0, 0, 0, .08); font-weight: 750; }
.search-field { display: flex; align-items: center; gap: 7px; flex: 1; padding-left: .7rem; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); }
.search-field input { border: 0; background: transparent; }
.search-field input:focus { outline: none; }
.search-field:focus-within, .big-search:focus-within { outline: 3px solid var(--coral); outline-offset: 3px; }
meter { width: 100%; height: 8px; border: 0; border-radius: 99px; background: var(--surface-2); }
meter::-webkit-meter-bar { height: 8px; border: 0; border-radius: 99px; background: var(--surface-2); }
meter::-webkit-meter-optimum-value { border-radius: 99px; background: var(--teal); }
meter::-moz-meter-bar { border-radius: 99px; background: var(--teal); }
.tag-row { display: inline-flex; flex-wrap: wrap; gap: 5px; }
.tag { display: inline-flex; align-items: center; min-height: 24px; padding: .13rem .45rem; border: 1px solid var(--line); border-radius: 99px; color: var(--ink-2); background: var(--surface); font-family: var(--font-mono); font-size: .7rem; }
.domain-badge { display: inline-grid; place-items: center; flex: 0 0 auto; width: 34px; height: 34px; border-radius: 9px; background: var(--teal-soft); color: var(--teal-dark); font-weight: 850; }
.domain-b { background: var(--blue-soft); color: var(--blue); }
.domain-c { background: var(--coral-soft); color: var(--coral-dark); }
.domain-d { background: var(--violet-soft); color: var(--violet); }
.domain-e { background: var(--gold-soft); color: var(--gold); }

/* Auth */
.auth-shell { background: #0f2027; color: #f5f6ef; }
.auth-shell::before { opacity: 1; background: radial-gradient(circle at 20% 30%, rgba(30, 139, 132, .34), transparent 34%), radial-gradient(circle at 80% 75%, rgba(229, 92, 69, .17), transparent 29%), linear-gradient(130deg, #101e24, #122b31); }
.auth-layout { width: min(calc(100% - 36px), 1120px); min-height: 100vh; margin: auto; padding: 50px 0; display: grid; grid-template-columns: 1.12fr .88fr; align-items: center; gap: clamp(50px, 9vw, 130px); }
.brand-large { margin-bottom: 60px; color: #fff; }
.brand-large small, .auth-intro .eyebrow { color: #7ed7cd; }
.auth-intro h1 { max-width: 680px; margin-bottom: 24px; font-size: clamp(3rem, 7vw, 6rem); }
.auth-intro > p:not(.eyebrow) { max-width: 600px; color: #c7d8d8; font-size: 1.12rem; }
.auth-principles { display: flex; gap: 30px; margin-top: 45px; }
.auth-principles span { display: grid; color: #a8baba; font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; }
.auth-principles strong { color: #fff; font-family: var(--font-serif); font-size: 2rem; line-height: 1; }
.auth-card { padding: clamp(25px, 4vw, 42px); border: 1px solid rgba(255,255,255,.13); border-radius: 24px; background: #f9f7ef; color: #18272e; box-shadow: 0 35px 100px rgba(0,0,0,.28); }
.auth-card h2 { margin-bottom: .5rem; }
.auth-card .muted { color: #64767d; }
.auth-card input { color: #18272e; background: #fffefa; }
.auth-card .form-stack { margin-top: 28px; }
.password-field { position: relative; display: flex; }
.password-field input { padding-right: 66px; }
.reveal-password { position: absolute; right: 6px; top: 6px; height: 32px; border: 0; background: transparent; color: #087d79; font-size: .78rem; font-weight: 800; cursor: pointer; }
.form-error { display: grid; margin: 20px 0 0; padding: .85rem 1rem; border-left: 4px solid #ae3b2c; background: #ffe3d9; color: #6d261f; }
.form-error span { font-size: .88rem; }
.security-note { margin: 22px 0 0; color: #64767d; font-size: .76rem; }

/* Dashboard */
.dashboard-shell { padding-top: 44px; }
.hero-grid { min-height: 315px; display: grid; grid-template-columns: 1fr 280px; align-items: center; gap: clamp(30px, 7vw, 95px); padding: clamp(28px, 5vw, 64px); border-radius: 26px; background: var(--ink); color: var(--paper); box-shadow: var(--shadow); overflow: hidden; position: relative; }
.hero-grid::after { content: "102"; position: absolute; right: 21%; bottom: -43%; color: color-mix(in srgb, var(--surface) 4%, transparent); font-family: var(--font-serif); font-size: 24rem; line-height: 1; pointer-events: none; }
.hero-copy { position: relative; z-index: 1; }
.hero-copy .eyebrow { color: #71d4c9; }
.hero-copy h1 { margin-bottom: 10px; color: #fff; font-size: clamp(2.7rem, 6vw, 5.3rem); }
.countdown-copy { max-width: 680px; color: color-mix(in srgb, var(--paper) 78%, transparent); font-size: 1.05rem; }
.countdown-copy strong { color: #fff; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 28px; }
.hero-facts > span { padding: .38rem .65rem; border: 1px solid rgba(255,255,255,.17); border-radius: 99px; color: #c7d6d6; font-size: .76rem; }
.status-pill.status-behind { border-color: rgba(255,128,107,.55); color: #ffab9c; }
.status-pill.status-ahead { border-color: rgba(84,199,187,.55); color: #7ad8cf; }
.readiness-orbit { position: relative; z-index: 2; width: 250px; height: 250px; display: flex; flex-direction: column; align-items: center; justify-content: center; justify-self: end; border: 1px solid rgba(255,255,255,.22); border-radius: 50%; color: #fff; text-decoration: none; background: radial-gradient(circle, rgba(255,255,255,.08), rgba(255,255,255,.01)); }
.readiness-orbit::before, .readiness-orbit::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(84,199,187,.3); }
.readiness-orbit::before { inset: 14px; border-left-color: var(--coral); transform: rotate(-30deg); }
.readiness-orbit::after { inset: -8px; border-right-color: transparent; }
.readiness-orbit:hover { color: #fff; background: rgba(255,255,255,.1); }
.readiness-orbit strong { font-family: var(--font-serif); font-size: 4.5rem; line-height: .95; }
.readiness-orbit > span { color: #b8cbcb; font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; }
.readiness-orbit .orbit-label { color: #77d4cb; }
.readiness-orbit small { margin-top: 9px; color: #fff; }
.setup-panel { display: grid; grid-template-columns: 1.3fr .7fr; gap: 50px; margin-top: 28px; padding: 35px; }
.step-number { float: left; margin-right: 20px; color: var(--coral); font-family: var(--font-serif); font-size: 3rem; line-height: 1; }
.compact-form { align-content: start; }
.today-card { display: grid; grid-template-columns: 135px 1fr; margin-top: 28px; overflow: hidden; }
.today-index { display: flex; flex-direction: column; align-items: center; justify-content: center; background: var(--teal-soft); color: var(--teal-dark); }
.today-index span, .today-index small { font-size: .7rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.today-index strong { font-family: var(--font-serif); font-size: 4rem; line-height: 1; }
.today-content { padding: clamp(24px, 4vw, 42px); }
.today-content h2 { max-width: 850px; }
.time-chip, .type-pill, .difficulty { display: inline-flex; padding: .25rem .55rem; border: 1px solid var(--line); border-radius: 99px; color: var(--ink-2); font-size: .72rem; white-space: nowrap; }
.task-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; margin: 25px 0; }
.task-list a { min-height: 105px; display: flex; flex-direction: column; padding: 13px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); text-decoration: none; }
.task-list a:hover { border-color: var(--teal); background: var(--teal-soft); }
.task-list a > span { color: var(--muted); font-size: .68rem; text-transform: uppercase; letter-spacing: .1em; }
.task-list a small { margin-top: auto; color: var(--teal-dark); }
.locked-panel { padding: 18px; border-left: 4px solid var(--gold); background: var(--gold-soft); }
.locked-panel p { margin-bottom: 14px; }
.dashboard-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 22px; margin-top: 22px; }
.weekly-card, .domain-card { padding: clamp(22px, 3vw, 34px); }
.date-range { color: var(--muted); font-size: .75rem; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; padding: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.stat { display: flex; flex-direction: column; padding: 14px; background: var(--surface); }
.stat dt { color: var(--muted); font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; }
.stat dd { margin: auto 0 0; }
.stat dd strong { font-family: var(--font-serif); font-size: 1.8rem; }
.weak-list, .spark-list { display: grid; gap: 9px; padding: 0; list-style: none; }
.weak-list li, .spark-list li { display: grid; grid-template-columns: 58px 1fr 48px; gap: 10px; align-items: center; font-size: .78rem; }
.weak-list strong, .spark-list strong { text-align: right; }
.domain-bars { display: grid; gap: 9px; }
.domain-bars a { display: grid; grid-template-columns: 34px 150px 1fr; gap: 12px; align-items: center; padding: 8px; border-radius: 10px; color: var(--ink); text-decoration: none; }
.domain-bars a:hover { background: var(--surface-2); }
.domain-bars a > span:nth-child(2) { display: grid; }
.domain-bars small { color: var(--muted); font-size: .68rem; }
.reschedule-strip, .privacy-strip, .offline-card-note { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 22px; padding: 18px 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-2); }
.reschedule-strip div, .privacy-strip, .offline-card-note { color: var(--ink-2); }
.reschedule-strip div { display: grid; }

/* Plan */
.plan-summary { display: grid; min-width: 120px; padding: 15px; border-left: 3px solid var(--teal); }
.plan-summary strong { font-family: var(--font-serif); font-size: 2.7rem; line-height: 1; }
.plan-summary strong span { color: var(--muted); font-size: 1rem; }
.plan-summary small { color: var(--muted); }
.plan-toolbar { position: sticky; top: calc(var(--header-height) + var(--safe-top) + 12px); z-index: 20; display: flex; justify-content: space-between; gap: 15px; margin-bottom: 45px; padding: 10px; }
.week-stack { display: grid; gap: 55px; }
.week-heading { display: flex; align-items: center; gap: 20px; margin-bottom: 18px; }
.week-heading > div { flex: 0 0 auto; }
.week-heading span:first-child { color: var(--coral); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.week-heading h2 { margin: 0; font-size: 1.7rem; }
.week-line { width: 100%; height: 1px; background: var(--line); }
.plan-days { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.plan-day { display: grid; grid-template-columns: 48px 1fr; min-height: 220px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); overflow: hidden; }
.plan-day[hidden] { display: none; }
.plan-day.is-complete { opacity: .72; }
.plan-day.is-locked { border-style: dashed; background: var(--surface-2); }
.day-rail { display: flex; flex-direction: column; align-items: center; padding-top: 15px; background: var(--surface-2); color: var(--ink-2); font-family: var(--font-mono); font-size: .78rem; }
.day-dot { width: 9px; height: 9px; margin-top: 10px; border: 2px solid var(--teal); border-radius: 50%; background: var(--surface); }
.is-complete .day-dot { background: var(--teal); }
.day-body { padding: 17px; }
.day-meta { display: flex; flex-wrap: wrap; gap: 7px 13px; color: var(--muted); font-size: .68rem; text-transform: uppercase; letter-spacing: .07em; }
.day-body h3 { margin: 10px 0 15px; line-height: 1.3; }
.day-work { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.day-work a { display: inline-flex; gap: 5px; padding: .25rem .5rem; border: 1px solid var(--line); border-radius: 6px; color: var(--ink-2); font-family: var(--font-mono); font-size: .68rem; text-decoration: none; }
.day-work a span { color: var(--teal-dark); }
.gate-note { display: grid; padding: 10px; border-left: 3px solid var(--gold); background: var(--gold-soft); font-size: .8rem; }
.done-note { color: var(--green); font-size: .8rem; }
.reschedule-card { display: grid; grid-template-columns: 1.2fr .8fr; gap: 50px; margin-top: 60px; padding: clamp(22px, 4vw, 38px); scroll-margin-top: 130px; }

/* Lists and filters */
.filter-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 35px; padding: 10px; }
.result-count { min-width: 85px; color: var(--muted); font-size: .78rem; text-align: right; }
.lesson-groups { display: grid; gap: 60px; }
.lesson-domain > header { display: flex; gap: 13px; align-items: center; margin-bottom: 17px; }
.lesson-domain > header h2 { margin: 0; font-size: 1.75rem; }
.lesson-domain > header p { margin: 1px 0 0; color: var(--muted); font-size: .78rem; }
.lesson-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; padding: 0; list-style: none; }
.lesson-list li { min-width: 0; }
.lesson-list a { min-height: 102px; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 12px; padding: 14px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); color: var(--ink); text-decoration: none; }
.lesson-list a:hover { border-color: var(--teal); box-shadow: var(--shadow-small); }
.lesson-number { color: var(--muted); font-family: var(--font-mono); }
.lesson-copy { min-width: 0; display: grid; gap: 8px; }
.lesson-copy strong { line-height: 1.35; }
.lesson-time { color: var(--muted); font-size: .74rem; white-space: nowrap; }
.empty-filter { padding: 35px; border: 1px dashed var(--line-strong); border-radius: 12px; color: var(--muted); text-align: center; }

/* Lesson */
.lesson-shell { padding-bottom: 90px; }
.lesson-hero { padding: clamp(28px, 4vw, 48px) max(18px, calc((100vw - var(--max)) / 2)); border-bottom: 1px solid var(--line); background: var(--surface); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 30px; color: var(--muted); font-size: .78rem; }
.breadcrumbs a { color: var(--muted); }
.lesson-kicker { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 18px; }
.lesson-kicker > span:last-child:not(.tag-row) { color: var(--muted); font-size: .78rem; }
.lesson-hero h1 { max-width: 1080px; margin-bottom: 25px; font-size: clamp(2.2rem, 4vw, 3.5rem); }
.lesson-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.lesson-layout { width: min(calc(100% - 36px), var(--max)); margin: 0 auto; display: grid; grid-template-columns: 190px minmax(0, var(--reading)); gap: clamp(40px, 8vw, 100px); align-items: start; }
.lesson-toc { position: sticky; top: calc(var(--header-height) + var(--safe-top) + 30px); padding-top: 55px; }
.lesson-toc > strong { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; }
.lesson-toc nav { display: grid; margin: 12px 0 25px; border-left: 1px solid var(--line); }
.lesson-toc a { padding: .36rem .75rem; color: var(--muted); font-size: .78rem; text-decoration: none; }
.lesson-toc a:hover { color: var(--ink); border-left: 2px solid var(--coral); margin-left: -1px; }
.lesson-progress-copy { display: flex; justify-content: space-between; color: var(--muted); font-size: .76rem; }
.lesson-content { min-width: 0; }
.lesson-section { padding: clamp(42px, 7vw, 78px) 0; border-bottom: 1px solid var(--line); }
.lesson-section h2 { margin-bottom: 25px; }
.eli5-section { margin-top: 40px; padding: clamp(25px, 5vw, 45px); border: 1px solid color-mix(in srgb, var(--teal) 35%, var(--line)); border-radius: var(--radius); background: var(--teal-soft); }
.prose { color: var(--ink-2); font-family: var(--font-serif); font-size: 1.08rem; line-height: 1.76; }
.prose h2, .prose h3, .prose h4 { margin: 2em 0 .65em; color: var(--ink); font-family: var(--font-sans); }
.prose h2 { font-size: 1.6rem; }
.prose h3 { font-size: 1.2rem; }
.prose p { margin-bottom: 1.3em; }
.prose strong { color: var(--ink); }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin-bottom: .55em; }
.prose blockquote { margin-inline: 0; padding: .8rem 1.2rem; border-left: 3px solid var(--coral); background: var(--surface-2); }
.prose pre, .code-card pre, .diagram-card pre { max-width: 100%; overflow: auto; padding: 18px; border-radius: 9px; background: #102128; color: #eaf2ef; line-height: 1.5; font-size: .78rem; }
.prose pre code, .code-card pre code, .diagram-card pre code { padding: 0; background: transparent; }
.prose table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; font-family: var(--font-sans); font-size: .86rem; }
.prose th, .prose td { min-width: 150px; padding: .65rem; border: 1px solid var(--line); text-align: left; }
.prose th { background: var(--surface-2); }
.diagram-grid { display: grid; gap: 15px; }
.diagram-card { margin: 0; padding: clamp(18px, 4vw, 30px); border: 1px solid var(--line); border-radius: 13px; background: var(--surface); }
.diagram-card figcaption { margin-bottom: 22px; font-weight: 750; }
.lesson-diagram { display: block; width: 100%; height: auto; background: #fff; border-radius: 8px; }
.diagram-flow { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 7px; padding: 12px 0; }
.diagram-node { max-width: 190px; padding: .55rem .75rem; border: 1px solid var(--teal); border-radius: 8px; background: var(--teal-soft); color: var(--ink); text-align: center; font-size: .76rem; }
.diagram-arrow { color: var(--coral); font-weight: 900; }
.diagram-card details { margin-top: 18px; color: var(--muted); font-size: .78rem; }
.definition-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.definition-grid > div { padding: 16px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); }
.definition-grid dt { margin-bottom: 7px; font-weight: 800; }
.definition-grid dd { margin: 0; color: var(--ink-2); font-size: .88rem; }
.portal-stack { display: grid; gap: 12px; }
.portal-path { padding: 18px; border-left: 4px solid var(--teal); background: var(--surface); }
.portal-path ol { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; counter-reset: portal; list-style: none; }
.portal-path li { display: inline-flex; align-items: center; gap: 6px; padding: .3rem .55rem; border-radius: 6px; background: var(--surface-2); font-size: .8rem; }
.portal-path li:not(:last-child)::after { content: "›"; color: var(--coral); }
.portal-path p { margin: 10px 0 0; color: var(--muted); font-size: .78rem; }
.code-grid { display: grid; gap: 12px; margin-top: 30px; }
.code-card { min-width: 0; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); overflow: hidden; }
.code-card header { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; padding: 11px 14px; }
.code-card header > span { color: var(--teal-dark); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.code-card header strong { font-size: .82rem; }
.code-card header button { border: 0; background: transparent; color: var(--teal-dark); cursor: pointer; }
.code-card pre { margin: 0; border-radius: 0; }
.code-card > p { margin: 0; padding: 13px; color: var(--muted); font-size: .8rem; }
.licence-card { margin: 55px 0 0; padding: 28px; border: 1px solid color-mix(in srgb, var(--gold) 50%, var(--line)); border-radius: 13px; background: var(--gold-soft); }
.licence-card h2 { margin-bottom: 10px; }
.licence-card p { margin-bottom: 0; }
.comparison-stack { display: grid; gap: 14px; }
.comparison-stack article { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); overflow: hidden; }
.comparison-stack article > p { padding: 0 20px; }
.versus { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 10px; padding: 18px 20px; background: var(--surface-2); }
.versus strong:last-child { text-align: right; }
.versus span { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--coral-dark); color: var(--on-accent); font-size: .65rem; font-weight: 850; text-transform: uppercase; }
.exam-tell { display: grid; gap: 4px; padding: 14px 20px; border-top: 1px solid var(--line); color: var(--ink-2); }
.exam-tell span { color: var(--coral-dark); font-size: .68rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.traps-section ol { display: grid; gap: 12px; padding: 0; list-style: none; }
.traps-section li { display: grid; grid-template-columns: 42px 1fr; gap: 15px; padding: 17px; border-left: 3px solid var(--coral); background: var(--coral-soft); }
.traps-section li > span { color: var(--coral-dark); font-family: var(--font-mono); }
.traps-section li p { margin: 0; }
.wording-grid { display: grid; gap: 8px; }
.wording-grid > div { display: grid; grid-template-columns: 1fr 30px 1fr; align-items: center; gap: 10px; padding: 12px; border-bottom: 1px solid var(--line); }
.wording-grid > div > span:first-child { color: var(--muted); }
.wording-grid > div > span:nth-child(2) { color: var(--coral); text-align: center; }
.recall-stack { display: grid; gap: 10px; }
.recall-stack details, .troubleshoot-stack details { border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.recall-stack summary, .troubleshoot-stack summary { padding: 16px; font-weight: 720; cursor: pointer; }
.recall-stack summary span { display: inline-grid; place-items: center; width: 27px; height: 27px; margin-right: 8px; border-radius: 50%; background: var(--teal-soft); color: var(--teal-dark); }
.recall-stack details > div, .troubleshoot-stack details > div { padding: 0 16px 16px; color: var(--ink-2); }
.linked-work { padding: 45px 0; }
.further-reading ul { padding-left: 1.2rem; }
.lesson-finish { display: flex; justify-content: space-between; align-items: center; gap: 25px; padding: 35px 0; }
.lesson-finish p { max-width: 390px; margin: 0; font-family: var(--font-serif); font-size: 1.45rem; }
.lesson-finish > div { display: flex; gap: 9px; }
.selection-tutor { position: fixed; z-index: 90; right: max(18px, env(safe-area-inset-right)); bottom: max(18px, env(safe-area-inset-bottom)); padding: .5rem .75rem; border: 0; border-radius: 8px; background: var(--ink); color: var(--surface); box-shadow: var(--shadow); cursor: pointer; }

/* Labs */
.lab-safety-banner { position: sticky; top: calc(var(--header-height) + var(--safe-top)); z-index: 60; display: flex; justify-content: center; gap: 15px; padding: 7px 18px; background: var(--danger); color: var(--on-accent); font-size: .78rem; text-align: center; }
.lab-safety-banner code { background: rgba(255,255,255,.16); }
.lab-count { display: flex; align-items: baseline; gap: 8px; }
.lab-count strong { font-family: var(--font-serif); font-size: 4rem; }
.callout { display: flex; justify-content: space-between; gap: 25px; margin-bottom: 25px; padding: 20px; border-radius: 12px; }
.callout-warning { border: 1px solid color-mix(in srgb, var(--gold) 55%, var(--line)); background: var(--gold-soft); }
.callout h2 { margin-bottom: 6px; font-size: 1.45rem; }
.callout p { margin: 0; }
.teardown-warning ul { display: flex; flex-wrap: wrap; gap: 6px; align-content: start; margin: 0; padding: 0; list-style: none; }
.teardown-warning li a { display: inline-flex; padding: .3rem .5rem; border: 1px solid var(--gold); border-radius: 5px; }
.safety-gate { display: grid; grid-template-columns: 70px 1fr; gap: 22px; margin-bottom: 28px; padding: clamp(22px, 4vw, 36px); border-color: var(--danger); }
.safety-symbol { display: grid; place-items: center; width: 62px; height: 62px; border-radius: 50%; background: var(--danger-soft); color: var(--danger); font-family: var(--font-serif); font-size: 2.5rem; }
.safety-gate h2 { margin-bottom: 9px; }
.safety-gate .check-row { margin: 20px 0 14px; }
.lab-catalogue { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.lab-card { min-width: 0; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); transition: transform .16s ease, box-shadow .16s ease; }
.lab-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-small); }
.lab-card > a { height: 100%; display: flex; flex-direction: column; padding: 19px; color: var(--ink); text-decoration: none; }
.lab-card-top { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.lab-card h2 { margin: 18px 0 12px; font-family: var(--font-sans); font-size: 1.05rem; line-height: 1.35; }
.lab-card-meta { display: grid; gap: 2px; margin-top: 18px; color: var(--muted); font-size: .72rem; }
.cost-flag { margin: 13px 0 0; padding: 6px; border-left: 3px solid var(--gold); background: var(--gold-soft); color: var(--ink-2); font-size: .72rem; }
.card-arrow { margin-top: auto; padding-top: 20px; color: var(--teal-dark); font-weight: 750; }
.lab-detail { padding-top: 32px; }
.lab-hero { max-width: 980px; margin-bottom: 45px; }
.lab-hero h1 { margin-bottom: 27px; }
.lab-facts { display: flex; flex-wrap: wrap; gap: 1px; padding: 1px; border: 1px solid var(--line); border-radius: 10px; background: var(--line); overflow: hidden; }
.lab-facts > div { min-width: 135px; flex: 1; padding: 12px 15px; background: var(--surface); }
.lab-facts dt { color: var(--muted); font-size: .65rem; text-transform: uppercase; letter-spacing: .08em; }
.lab-facts dd { margin: 2px 0 0; font-weight: 750; }
.lab-layout { display: grid; grid-template-columns: 190px minmax(0, 820px); gap: clamp(40px, 7vw, 90px); align-items: start; }
.lab-sidebar { position: sticky; top: calc(var(--header-height) + var(--safe-top) + 65px); }
.lab-sidebar nav { display: grid; border-left: 1px solid var(--line); }
.lab-sidebar nav a { padding: .4rem .75rem; color: var(--muted); font-size: .78rem; text-decoration: none; }
.lab-progress-panel { display: grid; margin-top: 24px; color: var(--muted); font-size: .74rem; }
.lab-progress-panel strong { color: var(--ink); font-size: 1.2rem; }
.lab-prereqs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.lab-prereqs article { padding: 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.lab-prereqs article:last-child { grid-column: 1 / -1; }
.lab-prereqs ul { margin-bottom: 0; padding-left: 1.1rem; }
.cost-warning { background: var(--gold-soft) !important; border-color: var(--gold) !important; }
.safety-copy { border-color: var(--danger) !important; }
.lab-section { padding: 52px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 125px; }
.check-list, .verification-list { display: grid; gap: 9px; padding-left: 1.4rem; }
.lab-steps { display: grid; gap: 16px; padding: 0; list-style: none; }
.lab-step { display: grid; grid-template-columns: 50px 1fr; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); overflow: hidden; }
.lab-step.is-complete { border-color: var(--green); }
.step-check { position: relative; display: flex; align-items: flex-start; justify-content: center; padding-top: 17px; background: var(--surface-2); cursor: pointer; }
.step-check input { position: absolute; top: 10px; left: 0; width: 100%; height: 44px; margin: 0; opacity: 0; z-index: 1; cursor: pointer; }
.step-check > span:not(.sr-only) { display: grid; place-items: center; width: 30px; height: 30px; border: 2px solid var(--line-strong); border-radius: 50%; background: var(--surface); color: var(--muted); font-family: var(--font-mono); font-size: .75rem; }
.step-check input:checked + span { border-color: var(--green); background: var(--green); color: var(--on-accent); }
.step-check input:focus-visible + span { outline: 3px solid var(--coral-dark); outline-offset: 3px; }
.step-content { min-width: 0; padding: 18px; }
.step-content h3 { font-size: 1.05rem; line-height: 1.45; }
.portal-route { display: grid; padding: 11px; border-left: 3px solid var(--teal); background: var(--teal-soft); }
.portal-route span { color: var(--teal-dark); font-size: .64rem; font-weight: 800; text-transform: uppercase; letter-spacing: .09em; }
.portal-route small { margin-top: 5px; color: var(--ink-2); }
.lab-visual { margin: 20px 0; padding: 13px; border: 1px solid var(--line); border-radius: 9px; background: #fff; }
.lab-visual img { display: block; width: 100%; max-height: 480px; object-fit: contain; }
.lab-visual figcaption { color: #52656c; font-size: .72rem; text-align: center; }
#portal-screens .lab-visual figcaption { font-size: 1rem; line-height: 1.6; text-align: left; }
#portal-screens .lab-visual figcaption a { overflow-wrap: anywhere; }
#portal-screens .license-notice { white-space: pre-wrap; overflow-wrap: anywhere; font: inherit; }
.step-evidence { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 14px; }
.step-evidence > div { padding: 11px; border: 1px solid var(--line); border-radius: 8px; }
.step-evidence span { color: var(--coral-dark); font-size: .63rem; font-weight: 800; text-transform: uppercase; letter-spacing: .07em; }
.step-evidence p { margin: 5px 0 0; color: var(--ink-2); font-size: .79rem; }
.save-row { display: flex; gap: 13px; align-items: center; margin-top: 10px; }
.troubleshoot-stack { display: grid; gap: 9px; }
.troubleshoot-stack p { display: grid; }
.troubleshoot-stack p strong { color: var(--ink); }
.teardown-section { padding: 30px; border: 1px solid var(--danger); border-radius: 14px; background: var(--danger-soft); }
.teardown-confirm { margin: 25px 0 15px; }
.lab-debrief { margin-top: 45px; padding: 30px; }

/* Readiness */
.readiness-score { min-width: 210px; display: grid; grid-template-columns: 1fr auto; align-items: end; padding: 18px; border-left: 4px solid var(--coral); background: var(--surface); }
.readiness-score span { grid-column: 1 / -1; color: var(--muted); font-size: .72rem; text-transform: uppercase; }
.readiness-score strong { font-family: var(--font-serif); font-size: 4rem; line-height: 1; }
.readiness-score small { color: var(--muted); }
.readiness-score.is-ready { border-color: var(--green); }
.readiness-verdict { padding: clamp(22px, 4vw, 38px); }
.readiness-verdict > div { display: flex; gap: 20px; }
.verdict-icon { display: grid; place-items: center; flex: 0 0 auto; width: 58px; height: 58px; border-radius: 50%; background: var(--teal-soft); color: var(--teal-dark); font-size: 1.8rem; }
.readiness-verdict h2 { margin-bottom: 10px; }
.readiness-verdict dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 25px 0 0; padding: 1px; background: var(--line); }
.readiness-verdict dl div { display: grid; padding: 13px; background: var(--surface); }
.readiness-verdict dt { color: var(--muted); font-size: .7rem; }
.readiness-verdict dd { margin: 0; font-weight: 750; }
.component-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 11px; margin: 50px 0; }
.component-card { padding: 20px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); }
.component-card > span { color: var(--muted); font-size: .68rem; text-transform: uppercase; }
.component-card h3 { min-height: 2.3em; margin: 10px 0; }
.component-card > strong { display: block; margin-bottom: 12px; font-family: var(--font-serif); font-size: 2.2rem; }
.domain-breakdown { padding: clamp(20px, 4vw, 34px); }
.readiness-table-wrap { overflow-x: auto; }
.domain-breakdown table { width: 100%; border-collapse: collapse; font-size: .78rem; }
.domain-breakdown th, .domain-breakdown td { padding: 10px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
.domain-breakdown th:first-child { text-align: left; }
.readiness-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 18px; }
.readiness-grid > article { padding: 28px; }
.formula { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.formula span, .formula strong { padding: .4rem .6rem; border: 1px solid var(--line); border-radius: 6px; }
.formula strong { color: var(--teal-dark); }
.next-points { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-top: 45px; padding: 35px 0; border-top: 1px solid var(--line); }

/* Quiz */
.exam-clock { display: grid; padding: 12px 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.exam-clock span { color: var(--muted); font-size: .68rem; text-transform: uppercase; }
.exam-clock strong { font-family: var(--font-mono); font-size: 1.7rem; }
.exam-clock.is-urgent { border-color: var(--danger); color: var(--danger); }
.practice-modes { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-bottom: 16px; }
.practice-mode { min-height: 115px; display: flex; flex-direction: column; align-items: flex-start; padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); cursor: pointer; text-align: left; }
.practice-mode > span { color: var(--coral); font-family: var(--font-mono); font-size: .68rem; }
.practice-mode strong { margin-top: auto; }
.practice-mode small { color: var(--muted); }
.practice-mode.is-active { border-color: var(--teal); background: var(--teal-soft); }
.quiz-config { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; padding: clamp(24px, 4vw, 42px); }
.exam-rules { display: grid; padding: 13px; border-left: 4px solid var(--coral); background: var(--coral-soft); }
.attempt-stage { max-width: 980px; margin: auto; }
.attempt-topbar { position: sticky; top: calc(var(--header-height) + var(--safe-top) + 10px); z-index: 30; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 15px; margin-bottom: 18px; padding: 10px; border: 1px solid var(--line); border-radius: 11px; background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(12px); }
.attempt-progress { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; color: var(--muted); font-size: .75rem; }
.case-panel { margin-bottom: 15px; padding: 25px; border: 1px solid var(--blue); border-radius: 12px; background: var(--blue-soft); }
.case-panel h2 { font-size: 1.7rem; }
.case-panel .prose { font-family: var(--font-sans); font-size: .9rem; }
.case-panel details { margin-top: 10px; }
.case-panel summary { font-weight: 750; cursor: pointer; }
.case-exhibit { margin-top: 12px; padding: 13px; border: 1px solid color-mix(in srgb, var(--blue) 50%, var(--line)); border-radius: 8px; background: var(--surface); }
.question-card { padding: clamp(22px, 5vw, 46px); border: 1px solid var(--line); border-radius: 17px; background: var(--surface); box-shadow: var(--shadow); }
.question-card > header { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 26px; }
.question-meta { display: flex; flex-wrap: wrap; gap: 5px; }
.question-meta span { padding: .25rem .45rem; border-radius: 5px; background: var(--surface-2); color: var(--muted); font-size: .67rem; text-transform: uppercase; }
.flag-button { border: 0; background: transparent; color: var(--muted); cursor: pointer; }
.flag-button[aria-pressed="true"] { color: var(--coral-dark); font-weight: 750; }
.scenario { margin-bottom: 25px; padding: 18px; border-left: 4px solid var(--blue); background: var(--blue-soft); color: var(--ink-2); }
.question-card h2 { margin-bottom: 30px; font-family: var(--font-sans); font-size: clamp(1.25rem, 3vw, 1.65rem); line-height: 1.42; }
.answer-options { display: grid; gap: 9px; }
.answer-option { display: flex; gap: 12px; align-items: flex-start; padding: 14px; border: 1px solid var(--line); border-radius: 9px; cursor: pointer; }
.answer-option:hover { border-color: var(--teal); background: var(--teal-soft); }
.answer-option input { flex: 0 0 auto; width: 20px; min-height: 20px; margin-top: 2px; accent-color: var(--teal); }
.answer-option span:first-of-type { display: grid; place-items: center; flex: 0 0 auto; width: 25px; height: 25px; border-radius: 50%; background: var(--surface-2); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.match-grid { display: grid; gap: 9px; }
.match-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: center; padding: 12px; border: 1px solid var(--line); border-radius: 9px; }
.order-list { display: grid; gap: 8px; padding: 0; list-style: none; }
.order-item { display: grid; grid-template-columns: 30px 1fr auto; align-items: center; gap: 8px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; }
.order-item .order-position { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--surface-2); font-family: var(--font-mono); font-size: .7rem; }
.order-controls { display: flex; }
.order-controls button { width: 34px; height: 34px; border: 0; background: transparent; cursor: pointer; }
.build-toggle { width: 20px; min-height: 20px; accent-color: var(--teal); }
.question-card > footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--line); }
.question-card > footer > span { color: var(--muted); font-size: .74rem; }
.question-map { margin-top: 15px; padding: 18px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); }
.question-map > div { display: flex; flex-wrap: wrap; gap: 5px; margin: 10px 0; }
.question-map button { width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 6px; background: transparent; font-size: .72rem; cursor: pointer; }
.question-map button.is-current { border-color: var(--teal); box-shadow: inset 0 0 0 1px var(--teal); }
.question-map button.is-answered { background: var(--teal-soft); }
.question-map button.is-flagged { border-bottom: 3px solid var(--coral); }
.question-map > span { display: flex; gap: 7px; align-items: center; color: var(--muted); font-size: .68rem; }
.map-dot { display: inline-block; width: 9px; height: 9px; margin-left: 8px; border-radius: 2px; }
.map-dot.answered { background: var(--teal); }
.map-dot.flagged { background: var(--coral); }
.result-hero { max-width: 680px; margin: auto; padding: 60px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); text-align: center; box-shadow: var(--shadow); }
.result-hero > strong { display: block; margin-bottom: 12px; font-family: var(--font-serif); font-size: clamp(4rem, 12vw, 7rem); line-height: 1; }
.result-hero .button-row { justify-content: center; margin-top: 25px; }
.review-stage { max-width: 900px; margin: auto; }
.review-list { display: grid; gap: 18px; }
.review-item { padding: 25px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); }
.review-item.is-correct { border-left: 5px solid var(--green); }
.review-item.is-partial { border-left: 5px solid var(--gold); }
.review-item.is-wrong { border-left: 5px solid var(--danger); }
.review-item h3 { line-height: 1.4; }
.review-answer { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin: 15px 0; }
.review-answer > div { padding: 12px; border: 1px solid var(--line); border-radius: 8px; }
.review-explanation { padding: 16px; background: var(--teal-soft); }
.wrong-explanations { display: grid; gap: 7px; }
.wrong-explanations details { border-bottom: 1px solid var(--line); }
.wrong-explanations summary { padding: 9px 0; cursor: pointer; }
.confirm-dialog { max-width: 480px; }

/* SRS */
.due-counter { display: grid; min-width: 130px; padding: 13px 20px; border-left: 3px solid var(--coral); }
.due-counter strong { font-family: var(--font-serif); font-size: 3.8rem; line-height: 1; }
.due-counter span { color: var(--muted); }
.srs-summary { display: grid; grid-template-columns: repeat(4, 1fr) 2fr; gap: 1px; margin-bottom: 22px; padding: 1px; border: 1px solid var(--line); border-radius: 11px; background: var(--line); overflow: hidden; }
.srs-summary > div { display: grid; padding: 12px; background: var(--surface); }
.srs-summary span { color: var(--muted); font-size: .68rem; text-transform: uppercase; }
.srs-summary strong { font-family: var(--font-serif); font-size: 1.65rem; }
.srs-filters { display: flex; gap: 6px; align-items: center; padding: 9px; background: var(--surface); }
.srs-filters input, .srs-filters select { min-height: 36px; padding: .45rem; }
.srs-session { max-width: 790px; margin: auto; }
.srs-progress { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: center; margin-bottom: 10px; color: var(--muted); font-size: .76rem; }
.flashcard { min-height: 460px; display: flex; align-items: stretch; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); }
.card-face { width: 100%; min-height: 100%; display: flex; flex-direction: column; padding: clamp(27px, 7vw, 60px); }
.card-meta { display: flex; flex-wrap: wrap; gap: 6px; color: var(--muted); font-size: .68rem; text-transform: uppercase; }
.card-front h2 { margin: auto 0; font-family: var(--font-serif); font-size: clamp(1.7rem, 5vw, 2.8rem); line-height: 1.35; }
.card-front > .button { align-self: center; }
.hint { margin: 20px 0; padding: 12px; border-top: 1px solid var(--line); }
.hint summary { color: var(--teal-dark); cursor: pointer; }
.card-back .prose { margin: auto 0; }
.card-back [data-card-back] { white-space: pre-line; }
.leech-warning { margin: 15px 0; padding: 12px; border-left: 4px solid var(--gold); background: var(--gold-soft); }
.rating-prompt { margin-top: 28px; color: var(--muted); font-size: .8rem; text-align: center; }
.rating-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; }
.rating-grid button { min-height: 78px; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 9px; background: transparent; cursor: pointer; }
.rating-grid button:hover { border-color: var(--teal); background: var(--teal-soft); }
.rating-grid small { color: var(--muted); font-size: .64rem; }
.rating-grid kbd { position: absolute; opacity: 0; }
.srs-complete { max-width: 600px; margin: auto; padding: 55px; text-align: center; }
.srs-complete .button-row { justify-content: center; }
.offline-card-note { max-width: 790px; margin-inline: auto; }

/* Tutor */
.usage-chip { min-width: 240px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 5px 15px; padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.usage-chip span { color: var(--muted); font-size: .68rem; text-transform: uppercase; }
.usage-chip strong { text-align: right; }
.usage-chip meter { grid-column: 1 / -1; }
.tutor-layout { display: grid; grid-template-columns: 250px 1fr; gap: 17px; align-items: start; }
.tutor-modes { position: sticky; top: calc(var(--header-height) + var(--safe-top) + 20px); display: grid; gap: 6px; }
.tutor-modes button { display: grid; padding: 13px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); cursor: pointer; text-align: left; }
.tutor-modes button span { font-weight: 750; }
.tutor-modes button small { color: var(--muted); }
.tutor-modes button.is-active { border-color: var(--teal); background: var(--teal-soft); }
.tutor-workbench { min-height: 610px; padding: clamp(22px, 4vw, 42px); }
.tutor-workbench > header { max-width: 650px; margin-bottom: 28px; }
.tutor-workbench > header h2 { margin-bottom: 8px; }
.tutor-form > div { display: grid; gap: 17px; }
.tutor-response { margin-top: 35px; padding-top: 30px; border-top: 1px solid var(--line); }
.response-heading { display: flex; justify-content: space-between; }
.tutor-collection { display: grid; gap: 11px; margin-top: 25px; }
.history-item, .generated-review { padding: 16px; border: 1px solid var(--line); border-radius: 9px; }
.history-item header, .generated-review header { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 9px; }
.history-item header span, .generated-review header span { color: var(--muted); font-size: .72rem; }
.history-item .prose { font-size: .94rem; }
.generated-review .scenario { font-size: .82rem; }
.generated-review li.is-correct { color: var(--green); font-weight: 800; }
.generated-review .review-controls { display: flex; gap: 8px; margin-top: 12px; }

/* Search/settings/errors */
.big-search { display: grid; grid-template-columns: 35px 1fr auto; align-items: center; margin-bottom: 25px; padding: 8px; border: 1px solid var(--line-strong); border-radius: 13px; background: var(--surface); box-shadow: var(--shadow-small); }
.big-search label { display: grid; place-items: center; font-size: 1.4rem; }
.big-search input { border: 0; background: transparent; font-size: 1.1rem; }
.big-search input:focus { outline: none; }
.search-status { margin-bottom: 12px; color: var(--muted); font-size: .84rem; }
.search-results { display: grid; gap: 9px; padding: 0; list-style: none; }
.search-result a { display: grid; gap: 7px; padding: 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink); text-decoration: none; }
.search-result a:hover { border-color: var(--teal); }
.search-result header { display: flex; align-items: center; gap: 8px; }
.search-result h2 { margin: 0; font-family: var(--font-sans); font-size: 1.05rem; }
.search-result p { margin: 0; color: var(--ink-2); font-size: .84rem; }
.settings-shell { display: grid; gap: 15px; }
.settings-shell .page-heading { margin-bottom: 20px; }
.settings-card, .security-card, .install-settings, .offline-settings { display: grid; grid-template-columns: 1fr 1fr; gap: 45px; padding: clamp(22px, 4vw, 35px); }
.install-state { color: var(--ink-2); }
.install-guides { display: grid; gap: 10px; }
.install-guides details { border-bottom: 1px solid var(--line); }
.install-guides summary { color: var(--teal-dark); font-weight: 750; cursor: pointer; }
.install-guides ol { margin: 8px 0 16px; padding-left: 1.3rem; }
.empty-state { padding: 60px 25px; text-align: center; }
.empty-mark { display: grid; place-items: center; width: 75px; height: 75px; margin: 0 auto 20px; border-radius: 50%; background: var(--teal-soft); color: var(--teal-dark); font-family: var(--font-serif); font-size: 2.2rem; }
.error-state { margin-top: 10vh; }
.dialog { width: min(calc(100% - 30px), 600px); padding: 25px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
.dialog::backdrop { background: rgba(3, 14, 18, .65); backdrop-filter: blur(4px); }
.dialog-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.dialog-heading h2 { margin: 0; }
.shortcut-list { display: grid; gap: 1px; background: var(--line); }
.shortcut-list div { display: grid; grid-template-columns: 100px 1fr; padding: 10px; background: var(--surface); }
.shortcut-list dt, .shortcut-list dd { margin: 0; }
.toast-region { position: fixed; z-index: 500; right: max(16px, env(safe-area-inset-right)); bottom: max(16px, env(safe-area-inset-bottom)); display: grid; gap: 7px; max-width: 360px; }
.toast { padding: 12px 15px; border: 1px solid var(--line); border-left: 4px solid var(--teal); border-radius: 8px; background: var(--surface); box-shadow: var(--shadow); }
.toast.is-error { border-left-color: var(--danger); }
.flash-stack { width: min(calc(100% - 36px), var(--max)); margin: 15px auto 0; }
.flash { padding: 11px 15px; border-left: 4px solid var(--teal); background: var(--teal-soft); }
.site-footer { width: min(calc(100% - 36px), var(--max)); display: flex; align-items: center; justify-content: space-between; gap: 25px; margin: 0 auto; padding: 28px 0 max(28px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); color: var(--muted); font-size: .76rem; }
.site-footer p { margin: 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 17px; }
.site-footer form { display: inline; }
.offline-shell { display: grid; place-items: center; min-height: 100vh; }
.offline-shell main { width: min(calc(100% - 36px), 620px); }
.offline-card { padding: clamp(30px, 8vw, 65px); border: 1px solid var(--line); border-radius: 20px; background: var(--surface); box-shadow: var(--shadow); }
.offline-library { margin-top: 30px; padding-top: 25px; border-top: 1px solid var(--line); }
.offline-library h2 { font-size: 1.45rem; }
.offline-links { display: grid; gap: 8px; margin: 15px 0 0; padding: 0; list-style: none; }
.offline-links .button { width: 100%; justify-content: flex-start; text-align: left; }

@media (max-width: 1050px) {
  .primary-nav { position: absolute; top: calc(var(--header-height) + var(--safe-top)); left: 16px; right: 16px; display: none; grid-template-columns: repeat(2, 1fr); padding: 10px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); box-shadow: var(--shadow); }
  .primary-nav.is-open { display: grid; }
  .nav-toggle { display: inline-grid; }
  .header-actions { margin-left: 0; }
  .task-list { grid-template-columns: repeat(2, 1fr); }
  .lab-catalogue { grid-template-columns: repeat(2, 1fr); }
  .practice-modes { grid-template-columns: repeat(3, 1fr); }
  .component-grid { grid-template-columns: repeat(2, 1fr); }
  .srs-summary { grid-template-columns: repeat(4, 1fr); }
  .srs-filters { grid-column: 1 / -1; }
  .lesson-hero h1 { font-size: clamp(2rem, 4vw, 2.25rem); }
}

@media (max-width: 760px) {
  :root { --header-height: 64px; }
  .page-shell { width: min(calc(100% - 24px), var(--max)); padding-top: 32px; }
  .header-inner { width: calc(100% - 20px); min-height: var(--header-height); gap: 8px; }
  .header-actions { padding-left: 5px; }
  .header-actions .theme-toggle { display: none; }
  .split-heading, .section-heading, .lesson-finish, .next-points, .reschedule-strip, .privacy-strip, .offline-card-note, .site-footer { align-items: flex-start; flex-direction: column; }
  .auth-layout { width: min(calc(100% - 28px), 520px); min-height: auto; grid-template-columns: 1fr; gap: 32px; padding: 28px 0; }
  .brand-large { margin-bottom: 28px; }
  .auth-intro h1 { font-size: 3.2rem; }
  .auth-principles { margin-top: 25px; }
  .hero-grid { grid-template-columns: 1fr; padding: 28px 20px; }
  .hero-grid::after { display: none; }
  .readiness-orbit { width: 190px; height: 190px; justify-self: center; }
  .readiness-orbit strong { font-size: 3.5rem; }
  .setup-panel, .dashboard-grid, .quiz-config, .reschedule-card, .readiness-grid, .settings-card, .security-card, .install-settings, .offline-settings { grid-template-columns: 1fr; gap: 22px; }
  .today-card { grid-template-columns: 1fr; }
  .today-index { min-height: 70px; flex-direction: row; gap: 8px; }
  .today-index strong { font-size: 2.7rem; }
  .task-list { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr 1fr; }
  .domain-bars a { grid-template-columns: 34px 112px 1fr; }
  .plan-days, .lesson-list { grid-template-columns: 1fr; }
  .plan-toolbar { top: calc(var(--header-height) + 7px); align-items: stretch; flex-direction: column; }
  .plan-toolbar .segmented { width: 100%; }
  .plan-toolbar .segmented button { flex: 1; }
  .lesson-layout, .lab-layout { display: block; width: min(calc(100% - 24px), var(--reading)); }
  .lesson-toc, .lab-sidebar { position: static; padding-top: 22px; }
  .lesson-toc nav, .lab-sidebar nav { display: flex; overflow-x: auto; border-left: 0; border-bottom: 1px solid var(--line); }
  .lesson-toc a, .lab-sidebar nav a { flex: 0 0 auto; }
  .lesson-progress-copy, .lab-progress-panel { display: none; }
  .lesson-content { width: 100%; }
  .eli5-section { margin-top: 20px; }
  .definition-grid { grid-template-columns: 1fr; }
  .portal-path ol { display: grid; }
  .portal-path li { justify-content: space-between; }
  .code-card header { grid-template-columns: 1fr auto; }
  .code-card header span { grid-column: 1 / -1; }
  .wording-grid > div { grid-template-columns: 1fr; }
  .wording-grid > div > span:nth-child(2) { transform: rotate(90deg); }
  .lesson-finish > div { display: grid; width: 100%; }
  .lab-safety-banner { top: calc(var(--header-height) + var(--safe-top)); gap: 3px; flex-direction: column; line-height: 1.2; }
  .lab-safety-banner span { display: none; }
  .lab-catalogue { grid-template-columns: 1fr; }
  .lab-prereqs { grid-template-columns: 1fr; }
  .lab-prereqs article:last-child { grid-column: auto; }
  .step-evidence { grid-template-columns: 1fr; }
  .readiness-verdict dl { grid-template-columns: 1fr; }
  .component-grid { grid-template-columns: 1fr 1fr; }
  .practice-modes { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; }
  .practice-mode { flex: 0 0 175px; scroll-snap-align: start; }
  .attempt-topbar { grid-template-columns: auto 1fr; }
  .attempt-topbar > .button:last-child { grid-column: 1 / -1; width: 100%; }
  .attempt-progress { grid-template-columns: auto 1fr; }
  .attempt-progress small { display: none; }
  .match-row { grid-template-columns: 1fr; }
  .question-card > footer { display: grid; grid-template-columns: 1fr 1fr; }
  .question-card > footer > span { grid-column: 1 / -1; grid-row: 1; text-align: center; }
  .review-answer { grid-template-columns: 1fr; }
  .srs-summary { grid-template-columns: repeat(2, 1fr); }
  .srs-filters { display: grid; grid-template-columns: 1fr 1fr; }
  .srs-filters button { grid-column: 1 / -1; }
  .flashcard { min-height: 510px; }
  .rating-grid { grid-template-columns: 1fr 1fr; }
  .tutor-layout { grid-template-columns: 1fr; }
  .tutor-modes { position: static; display: flex; overflow-x: auto; padding-bottom: 5px; }
  .tutor-modes button { flex: 0 0 180px; }
  .big-search { grid-template-columns: 30px 1fr; }
  .big-search .button { grid-column: 1 / -1; }
  .filter-bar { align-items: stretch; flex-direction: column; }
  .result-count { text-align: left; }
  .site-footer { width: calc(100% - 24px); }
}

@media (max-width: 430px) {
  body { font-size: 15px; }
  input, select, textarea { font-size: 16px; }
  h1 { font-size: 2.55rem; }
  .brand span { display: none; }
  .primary-nav { grid-template-columns: 1fr; max-height: calc(100vh - 85px); overflow-y: auto; }
  .hero-facts { display: grid; }
  .task-list { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .domain-bars a { grid-template-columns: 34px 1fr; }
  .domain-bars meter { grid-column: 1 / -1; }
  .lesson-list a { grid-template-columns: 30px 1fr; }
  .lesson-time { grid-column: 2; }
  .safety-gate { grid-template-columns: 1fr; }
  .lab-step { grid-template-columns: 44px 1fr; }
  .step-content { padding: 14px; }
  .component-grid { grid-template-columns: 1fr; }
  .attempt-progress { gap: 6px; }
  .question-card { padding: 20px 15px; }
  .question-card > header { flex-direction: column; }
  .card-face { padding: 28px 20px; }
  .usage-chip { min-width: 100%; }
  .auth-principles { gap: 18px; }
}

@media (display-mode: standalone) {
  :root { --safe-top: env(safe-area-inset-top); }
  body { padding-right: env(safe-area-inset-right); padding-left: env(safe-area-inset-left); }
  .site-header { margin-right: calc(-1 * env(safe-area-inset-right)); margin-left: calc(-1 * env(safe-area-inset-left)); padding-right: env(safe-area-inset-right); padding-left: env(safe-area-inset-left); }
  .auth-shell, .offline-shell { padding-top: env(safe-area-inset-top); padding-bottom: env(safe-area-inset-bottom); }
}

@media (hover: none), (pointer: coarse) {
  button, input:not([type="hidden"]), select, textarea, summary { min-height: 44px; }
  a[href] { min-width: 44px; min-height: 44px; }
  .brand, .icon-button, .avatar-link, .button-small, .segmented button, .order-controls button, .question-map button { min-width: 44px; min-height: 44px; }
  .avatar-link, .order-controls button, .question-map button { width: 44px; height: 44px; }
  .primary-nav a, .breadcrumbs a, .lesson-toc a, .lab-sidebar nav a, .link-button { display: inline-flex; align-items: center; }
  .reveal-password { top: 0; right: 0; min-width: 44px; height: 44px; }
  .check-row, .answer-option, .step-check { min-height: 44px; }
  .build-toggle { width: 44px; min-height: 44px; }
  .srs-filters input, .srs-filters select { min-height: 44px; }
  summary { padding-block: .55rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media print {
  .site-header, .site-footer, .lesson-toc, .lesson-actions, .selection-tutor, .lab-safety-banner, .lab-sidebar, button { display: none !important; }
  body { background: #fff; color: #111; }
  .lesson-layout, .lab-layout { display: block; width: 100%; }
  .lesson-hero { padding: 20px 0; }
  .lesson-section, .lab-section { break-inside: avoid; }
  a { color: #111; }
}