@layer reset, tokens, base, layout, components, utilities, responsive;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { min-height: 100%; scroll-behavior: smooth; }
  body { min-height: 100vh; margin: 0; }
  button, input, select, textarea { font: inherit; }
  button { color: inherit; }
  img, svg { display: block; max-width: 100%; }
  h1, h2, h3, p, ol, ul, dl, dd { margin: 0; }
  ol, ul { padding: 0; }
  a { color: inherit; }
  table { border-collapse: collapse; }
}

@layer tokens {
  :root {
    color-scheme: dark;
    --font-ui: "Source Sans 3", "Segoe UI", sans-serif;
    --font-display: "Literata", Georgia, serif;
    --font-mono: "IBM Plex Mono", ui-monospace, monospace;
    --bg: #11130f;
    --bg-elevated: #171914;
    --surface: #1c1f19;
    --surface-2: #22261f;
    --surface-3: #292e25;
    --ink: #f2efe5;
    --ink-2: #c9c7bc;
    --muted: #92968a;
    --faint: #899084;
    --line: #32372e;
    --line-strong: #484f42;
    --accent: #d8ae5d;
    --accent-ink: #1c170d;
    --accent-soft: #3a3020;
    --green: #62ad7d;
    --green-soft: #1d3527;
    --rust: #db7d68;
    --rust-soft: #40251f;
    --blue: #6f9fc5;
    --blue-soft: #203343;
    --purple: #9e88bf;
    --purple-soft: #332a40;
    --cold: #758391;
    --shadow: 0 18px 45px rgba(0, 0, 0, .22);
    --sidebar: 248px;
    --topbar: 82px;
    --radius-sm: 7px;
    --radius: 12px;
    --radius-lg: 17px;
    --transition: 160ms ease;
  }

  html[data-theme="light"] {
    color-scheme: light;
    --bg: #eeede7;
    --bg-elevated: #f6f4ee;
    --surface: #fbfaf5;
    --surface-2: #f1efe7;
    --surface-3: #e8e6dd;
    --ink: #20231d;
    --ink-2: #4f544b;
    --muted: #666c62;
    --faint: #63695f;
    --line: #d6d5cc;
    --line-strong: #b8bbb0;
    --accent: #7f5818;
    --accent-ink: #fffaf0;
    --accent-soft: #f2e5c8;
    --green: #337f55;
    --green-soft: #dcefe3;
    --rust: #ad4e3b;
    --rust-soft: #f5dfd8;
    --blue: #3775a4;
    --blue-soft: #dce9f4;
    --purple: #735a9b;
    --purple-soft: #e9e1f2;
    --cold: #647584;
    --shadow: 0 18px 45px rgba(45, 44, 37, .09);
  }
}

@layer base {
  body {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-ui);
    font-size: 15px;
    line-height: 1.5;
    text-rendering: optimizeLegibility;
  }

  ::selection { color: var(--accent-ink); background: var(--accent); }

  :focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
  }
  #main-content:focus { outline: none; }

  h1, h2, h3 { line-height: 1.1; text-wrap: balance; }
  h1 { font-family: var(--font-display); font-size: 30px; font-weight: 650; letter-spacing: -.035em; }
  h2 { font-family: var(--font-display); font-size: clamp(27px, 3vw, 42px); font-weight: 650; letter-spacing: -.04em; }
  h3 { font-size: 20px; font-weight: 650; letter-spacing: -.018em; }
  p { color: var(--ink-2); text-wrap: pretty; }

  button, select, input, textarea { border-radius: var(--radius-sm); }
  button { cursor: pointer; }
  button:disabled { cursor: not-allowed; opacity: .5; }
  select, input, textarea {
    width: 100%;
    color: var(--ink);
    background: var(--bg-elevated);
    border: 1px solid var(--line);
  }
  select, input { min-height: 44px; padding: 9px 12px; }
  textarea { padding: 16px; resize: vertical; }
  option { background: var(--surface); }

  .skip-link {
    position: fixed;
    z-index: 999;
    top: 10px;
    left: 10px;
    transform: translateY(-200%);
    padding: 10px 14px;
    color: var(--accent-ink);
    background: var(--accent);
    border-radius: var(--radius-sm);
    text-decoration: none;
  }
  .skip-link:focus { transform: none; }
}

@layer layout {
  .app-shell { min-height: 100vh; }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 30;
    display: flex;
    width: var(--sidebar);
    flex-direction: column;
    gap: 28px;
    padding: 25px 17px 18px;
    overflow-y: auto;
    background: var(--bg-elevated);
    border-right: 1px solid var(--line);
  }

  .main-column { min-height: 100vh; margin-left: var(--sidebar); }

  .topbar {
    position: sticky;
    z-index: 20;
    top: 0;
    display: flex;
    min-height: var(--topbar);
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 14px clamp(20px, 3vw, 44px);
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
  }

  .topbar-title, .topbar-actions { display: flex; align-items: center; gap: 13px; }
  .topbar-actions { justify-content: flex-end; }
  .topbar-title h1 { margin-top: 2px; }

  main { max-width: 1600px; margin: 0 auto; padding: 32px clamp(20px, 3vw, 44px) 70px; }
  .view { display: none; animation: view-in 180ms ease both; }
  .view.is-active { display: block; }

  .today-layout { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(295px, .72fr); gap: 22px; margin-top: 28px; }
  .today-primary, .today-aside { min-width: 0; }
  .today-aside { display: flex; flex-direction: column; gap: 15px; }

  .page-intro {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 28px;
    margin-bottom: 27px;
  }
  .page-intro > div:first-child { max-width: 760px; }
  .page-intro p { max-width: 720px; margin-top: 9px; font-size: 16px; }

  .heat-layout { display: grid; grid-template-columns: minmax(600px, 1.2fr) minmax(330px, .8fr); gap: 18px; align-items: start; }
  .heat-detail { position: sticky; top: calc(var(--topbar) + 18px); }

  .mock-layout { display: grid; grid-template-columns: minmax(300px, .7fr) minmax(360px, 1fr) minmax(280px, .75fr); gap: 18px; align-items: stretch; }

  .flashcard-layout { display: grid; grid-template-columns: 230px minmax(360px, 760px); gap: 20px; justify-content: center; align-items: start; }
  .summary-layout { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 18px; align-items: start; }
  .summary-nav { position: sticky; top: calc(var(--topbar) + 18px); }
  .essay-layout { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(300px, .6fr); gap: 18px; align-items: start; }
  .taf-standards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-bottom: 18px; }
  .taf-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); gap: 18px; align-items: start; }
  .sources-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; margin-bottom: 18px; }
  .auth-screen { min-height: 100vh; display: grid; grid-template-columns: minmax(340px, 520px) minmax(340px, 660px); place-content: center; gap: clamp(35px, 7vw, 110px); padding: 32px; }
  .admin-layout { display: grid; grid-template-columns: minmax(280px, .55fr) minmax(520px, 1.45fr); gap: 18px; align-items: start; }
}

@layer components {
  @keyframes view-in { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }
  @keyframes spin { to { transform: rotate(360deg); } }

  .loading-screen {
    position: fixed;
    z-index: 200;
    inset: 0;
    display: grid;
    place-content: center;
    gap: 15px;
    text-align: center;
    background: var(--bg);
    transition: opacity 240ms ease, visibility 240ms ease;
  }
  .loading-screen::after {
    width: 24px;
    height: 24px;
    margin: 5px auto 0;
    border: 2px solid var(--line-strong);
    border-top-color: var(--accent);
    border-radius: 50%;
    content: "";
    animation: spin 800ms linear infinite;
  }
  .loading-screen.is-done { opacity: 0; visibility: hidden; }
  .loading-screen p { color: var(--muted); }
  .loading-mark { font: 700 66px/1 var(--font-display); letter-spacing: -.09em; }
  .loading-mark span, .brand-mark span { color: var(--accent); }

  .auth-card { padding: clamp(27px, 4vw, 46px); background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
  .auth-brand { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 24px; margin-bottom: 28px; border-bottom: 1px solid var(--line); }
  .auth-brand .loading-mark { font-size: 37px; }
  .auth-brand > span { color: var(--muted); font: 600 9px/1 var(--font-mono); letter-spacing: .12em; }
  .auth-card h1 { margin-top: 8px; font-size: clamp(32px, 4vw, 48px); }
  .auth-card > p { margin-top: 12px; }
  .auth-form { display: flex; flex-direction: column; gap: 15px; margin-top: 28px; }
  .auth-form label > span, .admin-create-form label > span { display: block; margin-bottom: 5px; color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .auth-footnote { padding-top: 18px; margin-top: 24px !important; color: var(--muted) !important; border-top: 1px solid var(--line); font-size: 12px; }
  .auth-context { align-self: center; }
  .auth-context h2 { max-width: 620px; margin-top: 14px; font-size: clamp(36px, 5vw, 66px); }
  .auth-context ul { display: flex; flex-direction: column; gap: 12px; margin-top: 34px; list-style: none; }
  .auth-context li { padding: 13px 0 13px 26px; color: var(--ink-2); border-top: 1px solid var(--line); }
  .auth-context li::before { margin-left: -24px; margin-right: 12px; color: var(--accent); content: "✓"; }
  .form-error { padding: 10px 12px; color: var(--rust); background: var(--rust-soft); border: 1px solid color-mix(in srgb, var(--rust) 55%, transparent); border-radius: var(--radius-sm); font-size: 13px; }

  .brand { display: flex; align-items: center; gap: 12px; padding: 0 8px; }
  .menu-close { display: none; width: 34px; height: 34px; margin-left: auto; padding: 0; color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: var(--radius-sm); font-size: 21px; }
  .brand-mark {
    display: grid;
    width: 46px;
    height: 46px;
    place-items: center;
    flex: 0 0 auto;
    font: 700 19px/1 var(--font-display);
    letter-spacing: -.08em;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
  }
  .brand strong, .brand span { display: block; }
  .brand strong { font-size: 14px; }
  .brand span { margin-top: 2px; color: var(--muted); font: 500 10px/1.2 var(--font-mono); letter-spacing: .05em; text-transform: uppercase; }

  .nav-list { display: flex; flex-direction: column; gap: 3px; }
  .nav-item {
    display: grid;
    min-height: 43px;
    grid-template-columns: 29px 1fr;
    align-items: center;
    gap: 9px;
    padding: 7px 11px;
    color: var(--muted);
    text-align: left;
    background: transparent;
    border: 1px solid transparent;
    transition: color var(--transition), background var(--transition), border var(--transition);
  }
  .nav-item:hover { color: var(--ink); background: var(--surface); }
  .nav-item.is-active { color: var(--ink); background: var(--surface-2); border-color: var(--line); }
  .nav-item.is-active .nav-code { color: var(--accent); }
  .nav-code { color: var(--faint); font: 500 10px/1 var(--font-mono); }

  .sidebar-status {
    display: grid;
    grid-template-columns: 10px 1fr;
    gap: 10px;
    align-items: start;
    margin-top: auto;
    padding: 14px 10px;
    border-top: 1px solid var(--line);
  }
  .status-dot { width: 7px; height: 7px; margin-top: 5px; background: var(--green); border-radius: 50%; box-shadow: 0 0 0 4px var(--green-soft); }
  .sidebar-status strong, .sidebar-status span { display: block; }
  .sidebar-status strong { font-size: 12px; }
  .sidebar-status span { margin-top: 3px; color: var(--muted); font-size: 11px; }
  .sidebar-account { padding: 14px 10px; border-top: 1px solid var(--line); }
  .sidebar-account > strong, .sidebar-account > span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .sidebar-account > strong { margin-top: 7px; font-size: 13px; }
  .sidebar-account > span:not(.eyebrow) { margin-top: 3px; color: var(--muted); font-size: 11px; }
  .account-actions { display: flex; gap: 14px; margin-top: 10px; font-size: 12px; }

  .eyebrow { color: var(--accent); font: 600 10px/1.2 var(--font-mono); letter-spacing: .11em; text-transform: uppercase; }

  .exam-chip { padding: 7px 11px; border-right: 1px solid var(--line); text-align: right; }
  .exam-chip span, .exam-chip strong { display: block; }
  .exam-chip span { color: var(--muted); font: 500 9px/1 var(--font-mono); letter-spacing: .1em; }
  .exam-chip strong { margin-top: 4px; font: 600 11px/1 var(--font-mono); }

  .button, .icon-button, .text-button, .star-button {
    border: 0;
    transition: transform var(--transition), color var(--transition), background var(--transition), border-color var(--transition);
  }
  .button {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    font-weight: 650;
    text-decoration: none;
    border: 1px solid transparent;
  }
  .button:hover:not(:disabled) { transform: translateY(-1px); }
  .button-primary { color: var(--accent-ink); background: var(--accent); }
  .button-primary:hover:not(:disabled) { background: color-mix(in srgb, var(--accent) 88%, white); }
  .button-secondary { color: var(--ink); background: var(--surface-2); border-color: var(--line); }
  .button-secondary:hover:not(:disabled) { border-color: var(--line-strong); }
  .button-danger { color: #fff; background: var(--rust); }
  .button-compact { min-height: 38px; padding: 8px 13px; font-size: 13px; }
  .button-wide { width: 100%; margin-top: 9px; }
  .icon-button {
    min-width: 42px;
    min-height: 42px;
    padding: 8px 10px;
    color: var(--ink-2);
    background: var(--surface);
    border: 1px solid var(--line);
    font: 500 10px/1 var(--font-mono);
    text-transform: uppercase;
  }
  .icon-button:hover { color: var(--ink); border-color: var(--line-strong); }
  .menu-toggle { display: none; }
  .text-button { padding: 0; color: var(--accent); background: transparent; font-weight: 650; }
  .text-button:hover { color: color-mix(in srgb, var(--accent) 75%, white); }
  .star-button { width: 42px; height: 42px; color: var(--muted); background: transparent; font-size: 27px; }
  .star-button.is-starred { color: var(--accent); }

  .panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 1px 0 rgba(255,255,255,.02); }
  .panel-heading { display: flex; align-items: start; justify-content: space-between; gap: 14px; }
  .panel-heading h3 { margin-top: 7px; }

  .metric-ribbon {
    display: grid;
    grid-template-columns: 1.05fr 1fr 1fr 1.1fr;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
  }
  .metric { min-width: 0; padding: 20px 22px; border-right: 1px solid var(--line); }
  .metric:last-child { border-right: 0; }
  .metric > span, .metric > strong, .metric > small { display: block; }
  .metric > span { color: var(--muted); font: 500 10px/1.3 var(--font-mono); letter-spacing: .07em; text-transform: uppercase; }
  .metric > strong { margin-top: 8px; font: 600 clamp(28px, 3vw, 43px)/1 var(--font-mono); letter-spacing: -.06em; }
  .metric > small { margin-top: 8px; color: var(--muted); font-size: 12px; }
  .metric-countdown > strong { color: var(--accent); }
  .metric-action { background: var(--surface-2); }
  .metric-action .text-button { margin-top: 7px; font-size: 12px; }

  .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
  .section-heading h2 { margin-top: 6px; font-size: 29px; }
  .study-rule { display: grid; grid-template-columns: repeat(3, auto); gap: 2px 8px; text-align: center; }
  .study-rule span { grid-row: 2; color: var(--muted); font: 500 8px/1 var(--font-mono); text-transform: uppercase; }
  .study-rule strong { font: 600 17px/1 var(--font-mono); }
  .study-rule strong::after { color: var(--muted); content: "%"; font-size: 9px; }

  .task-stack { display: flex; flex-direction: column; gap: 10px; }
  .task-card {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr) auto;
    gap: 17px;
    align-items: center;
    padding: 17px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transition: background var(--transition), border var(--transition);
  }
  .task-card:hover { background: var(--surface-2); border-color: var(--line-strong); }
  .task-card.is-complete { opacity: .64; }
  .task-card.is-complete .task-title { text-decoration: line-through; }
  .task-order {
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    color: var(--accent);
    font: 600 14px/1 var(--font-mono);
    border: 1px solid var(--line-strong);
    border-radius: 50%;
  }
  .task-body { min-width: 0; }
  .task-meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; color: var(--muted); font: 500 10px/1.2 var(--font-mono); text-transform: uppercase; }
  .task-title { margin-top: 6px; font-size: 18px; }
  .task-subtopics { margin-top: 5px; overflow: hidden; color: var(--muted); text-overflow: ellipsis; white-space: nowrap; }
  .task-actions { display: flex; gap: 8px; align-items: center; }
  .task-check {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    color: var(--muted);
    background: var(--bg-elevated);
    border: 1px solid var(--line);
  }
  .task-check:hover, .task-check.is-complete { color: var(--accent-ink); background: var(--green); border-color: var(--green); }

  .today-aside .panel { padding: 19px; }
  .readiness-panel { border-top-color: var(--accent); }
  .tag {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 4px 8px;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
    border-radius: 999px;
    font: 600 9px/1 var(--font-mono);
    letter-spacing: .05em;
    text-transform: uppercase;
  }
  .tag-neutral { color: var(--ink-2); background: var(--surface-2); border-color: var(--line); }
  .tag-hot { color: var(--rust); background: var(--rust-soft); border-color: color-mix(in srgb, var(--rust) 35%, transparent); }
  .tag-warm { color: var(--accent); background: var(--accent-soft); }
  .tag-cold { color: var(--cold); background: color-mix(in srgb, var(--cold) 15%, transparent); border-color: color-mix(in srgb, var(--cold) 35%, transparent); }
  .readiness-gauge { margin: 24px 0 14px; }
  .gauge-track { position: relative; height: 7px; background: var(--surface-3); border-radius: 99px; }
  .gauge-track span { display: block; width: 0; height: 100%; background: var(--accent); border-radius: inherit; transition: width 600ms ease; }
  .gauge-track i { position: absolute; top: -4px; left: var(--target-position, 90%); width: 2px; height: 15px; background: var(--ink); }
  .gauge-labels { display: flex; justify-content: space-between; margin-top: 8px; color: var(--faint); font: 500 8px/1 var(--font-mono); }
  .readiness-panel > p, .compact-panel > p { margin-top: 12px; font-size: 13px; }

  .milestone-list { position: relative; display: flex; flex-direction: column; gap: 0; margin-top: 17px; list-style: none; }
  .milestone-list::before { position: absolute; top: 12px; bottom: 12px; left: 26px; width: 1px; background: var(--line); content: ""; }
  .milestone-list li { position: relative; display: grid; min-height: 45px; grid-template-columns: 54px 1fr; gap: 12px; align-items: center; }
  .milestone-list time { z-index: 1; color: var(--muted); background: var(--surface); font: 500 9px/1 var(--font-mono); }
  .milestone-list li::after { position: absolute; left: 23px; width: 7px; height: 7px; background: var(--line-strong); border-radius: 50%; content: ""; }
  .milestone-list li span { color: var(--ink-2); font-size: 13px; }
  .milestone-list .is-final time, .milestone-list .is-final span { color: var(--accent); }
  .milestone-list .is-final::after { background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
  .source-link { display: inline-block; margin-top: 14px; color: var(--accent); font-size: 12px; text-underline-offset: 3px; }

  .inline-actions { display: flex; flex-wrap: wrap; gap: 8px; }
  .phase-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; margin-bottom: 22px; }
  .phase-item { position: relative; min-height: 64px; padding: 11px 12px; overflow: hidden; color: var(--muted); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); }
  .phase-item.is-current { color: var(--ink); border-color: var(--phase-color); }
  .phase-item::after { position: absolute; inset: auto 0 0; height: 3px; background: var(--phase-color); content: ""; }
  .phase-item strong, .phase-item span { display: block; }
  .phase-item strong { font-size: 12px; }
  .phase-item span { margin-top: 4px; font: 500 9px/1.2 var(--font-mono); }
  .schedule-range { margin-bottom: 10px; color: var(--muted); font: 500 11px/1 var(--font-mono); text-transform: uppercase; }
  .schedule-grid { display: flex; flex-direction: column; gap: 10px; }
  .schedule-day { display: grid; grid-template-columns: 118px minmax(0, 1fr); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
  .schedule-day.is-today { border-color: var(--accent); }
  .schedule-date { padding: 16px; background: var(--surface-2); border-right: 1px solid var(--line); }
  .schedule-date strong, .schedule-date span { display: block; }
  .schedule-date strong { font: 600 27px/1 var(--font-mono); }
  .schedule-date span { margin-top: 5px; color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .schedule-tasks { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
  .schedule-task { padding: 15px 17px; border-right: 1px solid var(--line); }
  .schedule-task:last-child { border-right: 0; }
  .schedule-task.is-complete { opacity: .58; }
  .schedule-task-top { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .schedule-task h3 { margin-top: 8px; font-size: 16px; }
  .schedule-task p { margin-top: 5px; font-size: 12px; }
  .schedule-task-footer { display: flex; align-items: center; justify-content: space-between; gap: 9px; margin-top: 12px; }
  .mix-mini { display: flex; height: 4px; flex: 1; overflow: hidden; background: var(--line); border-radius: 99px; }
  .mix-mini i:nth-child(1) { background: var(--blue); }
  .mix-mini i:nth-child(2) { background: var(--accent); }
  .mix-mini i:nth-child(3) { background: var(--green); }

  .legend { display: flex; gap: 16px; color: var(--muted); font: 500 10px/1 var(--font-mono); text-transform: uppercase; }
  .legend span { display: inline-flex; align-items: center; gap: 6px; }
  .heat-dot { width: 8px; height: 8px; border-radius: 50%; }
  .heat-dot.hot { background: var(--rust); }
  .heat-dot.warm { background: var(--accent); }
  .heat-dot.cold { background: var(--cold); }
  .heat-table-wrap { overflow: hidden; }
  .data-table { width: 100%; }
  .data-table th { padding: 13px 15px; color: var(--muted); font: 600 9px/1 var(--font-mono); text-align: left; letter-spacing: .08em; text-transform: uppercase; background: var(--surface-2); border-bottom: 1px solid var(--line); }
  .data-table td { padding: 14px 15px; border-bottom: 1px solid var(--line); vertical-align: middle; }
  .data-table tbody tr:last-child td { border-bottom: 0; }
  .heat-table tbody tr { cursor: pointer; transition: background var(--transition); }
  .heat-table tbody tr:hover, .heat-table tbody tr.is-active { background: var(--surface-2); }
  .heat-subject-name strong, .heat-subject-name span { display: block; }
  .heat-subject-name span { margin-top: 3px; color: var(--muted); font-size: 11px; }
  .heat-score { display: flex; align-items: center; gap: 9px; }
  .heat-bar { width: 74px; height: 5px; background: var(--surface-3); border-radius: 99px; }
  .heat-bar i { display: block; height: 100%; background: var(--rust); border-radius: inherit; }
  .heat-score strong, .time-share { font: 600 12px/1 var(--font-mono); }
  .heat-detail { padding: 20px; }
  .heat-detail-header { display: flex; align-items: start; justify-content: space-between; gap: 14px; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
  .heat-detail-header h3 { margin-top: 7px; }
  .heat-detail > p { margin-top: 15px; }
  .evidence-note { padding: 12px; margin-top: 15px; color: var(--ink-2); background: var(--surface-2); border-radius: var(--radius-sm); font-size: 12px; }
  .topic-list { display: flex; flex-direction: column; gap: 0; margin-top: 16px; }
  .topic-row { padding: 13px 0; border-top: 1px solid var(--line); }
  .topic-row-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
  .topic-row strong { font-size: 14px; }
  .topic-row p { margin-top: 5px; font-size: 12px; }

  .question-intro { align-items: center; }
  .quiz-score { min-width: 118px; padding: 12px 16px; text-align: right; border: 1px solid var(--line); border-radius: var(--radius); }
  .quiz-score span, .quiz-score strong { display: block; }
  .quiz-score span { color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .quiz-score strong { margin-top: 5px; font: 600 20px/1 var(--font-mono); }
  .daily-subject-panel { padding: 18px; margin-bottom: 17px; }
  .daily-subject-panel .panel-heading > small { color: var(--muted); }
  .daily-subject-progress { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 20px; margin-top: 14px; }
  .daily-subject-row { display: grid; grid-template-columns: minmax(145px, 1fr) 90px auto; gap: 12px; align-items: center; padding: 11px 0; border-top: 1px solid var(--line); }
  .daily-subject-row strong, .daily-subject-row span { display: block; }
  .daily-subject-row strong { font-size: 13px; }
  .daily-subject-row > div:first-child span { margin-top: 3px; color: var(--muted); font: 500 10px/1 var(--font-mono); }
  .daily-subject-row.is-complete strong { color: var(--green); }
  .daily-subject-bar { height: 5px; overflow: hidden; background: var(--surface-3); border-radius: 99px; }
  .daily-subject-bar span { height: 100%; background: var(--accent); border-radius: inherit; }
  .daily-subject-row.is-complete .daily-subject-bar span { background: var(--green); }
  .filter-bar { display: flex; align-items: end; gap: 10px; margin-bottom: 17px; padding: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
  .filter-bar label { min-width: 185px; }
  .filter-bar label > span, .field-label { display: block; margin-bottom: 5px; color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .filter-bar .check-filter { display: flex; min-width: auto; min-height: 44px; align-items: center; gap: 8px; padding: 0 8px; }
  .check-filter input { width: 17px; min-height: 17px; margin: 0; accent-color: var(--accent); }
  .check-filter > span { margin: 0 !important; color: var(--ink-2) !important; text-transform: none !important; }
  .empty-state { display: flex; min-height: 230px; align-items: center; justify-content: center; gap: 28px; padding: 35px; }
  .empty-index { color: var(--line-strong); font: 600 76px/1 var(--font-mono); letter-spacing: -.12em; }
  .empty-state p { max-width: 540px; margin: 8px 0 17px; }
  .quiz-workspace { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 15px; align-items: start; }
  .quiz-rail { position: sticky; top: calc(var(--topbar) + 17px); padding: 15px; }
  .quiz-progress-copy span, .quiz-progress-copy strong { display: block; }
  .quiz-progress-copy span { color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .quiz-progress-copy strong { margin-top: 6px; font-size: 13px; }
  .quiz-progress { height: 4px; margin: 13px 0; overflow: hidden; background: var(--surface-3); border-radius: 99px; }
  .quiz-progress span { display: block; width: 0; height: 100%; background: var(--accent); transition: width 220ms ease; }
  .quiz-index { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; }
  .quiz-index button { aspect-ratio: 1; padding: 0; color: var(--muted); background: var(--surface-2); border: 1px solid var(--line); font: 500 10px/1 var(--font-mono); }
  .quiz-index button.is-current { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
  .quiz-index button.is-correct { color: var(--green); border-color: var(--green); }
  .quiz-index button.is-wrong { color: var(--rust); border-color: var(--rust); }
  .question-card { padding: clamp(20px, 3vw, 36px); }
  .question-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
  .question-meta > div { display: flex; gap: 6px; }
  .question-topic { margin-top: 18px; color: var(--accent); font: 500 10px/1.4 var(--font-mono); text-transform: uppercase; }
  .question-card > h3 { max-width: 960px; margin-top: 11px; font-size: clamp(20px, 2.3vw, 27px); line-height: 1.3; }
  .question-options { display: flex; flex-direction: column; gap: 8px; margin-top: 25px; }
  .option-button {
    display: grid;
    width: 100%;
    min-height: 52px;
    grid-template-columns: 34px 1fr;
    gap: 11px;
    align-items: center;
    padding: 10px 14px;
    color: var(--ink-2);
    text-align: left;
    background: var(--bg-elevated);
    border: 1px solid var(--line);
    transition: background var(--transition), border var(--transition), color var(--transition);
  }
  .option-button:hover:not(:disabled) { color: var(--ink); background: var(--surface-2); border-color: var(--line-strong); }
  .option-button:disabled { cursor: default; opacity: 1; }
  .option-letter { display: grid; width: 30px; height: 30px; place-items: center; color: var(--muted); border: 1px solid var(--line-strong); border-radius: 50%; font: 600 11px/1 var(--font-mono); }
  .option-button.is-selected { color: var(--ink); border-color: var(--accent); background: var(--accent-soft); }
  .option-button.is-selected .option-letter { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
  .option-button.is-correct { border-color: var(--green); background: var(--green-soft); }
  .option-button.is-correct .option-letter { color: #fff; background: var(--green); border-color: var(--green); }
  .option-button.is-wrong { border-color: var(--rust); background: var(--rust-soft); }
  .option-button.is-wrong .option-letter { color: #fff; background: var(--rust); border-color: var(--rust); }
  .question-feedback { margin-top: 19px; padding: 17px; background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius-sm); }
  .question-feedback.is-correct { border-color: color-mix(in srgb, var(--green) 55%, var(--line)); }
  .question-feedback.is-wrong { border-color: color-mix(in srgb, var(--rust) 55%, var(--line)); }
  .question-feedback strong { display: block; color: var(--ink); }
  .question-feedback p { margin-top: 7px; }
  .question-feedback a { display: inline-block; margin-top: 9px; color: var(--accent); font-size: 12px; }
  .question-actions { display: flex; align-items: center; justify-content: flex-end; gap: 10px; margin-top: 20px; }
  .keyboard-hint { margin-right: auto; color: var(--faint); font: 500 9px/1 var(--font-mono); }

  .mock-start-panel { padding: 24px; border-top-color: var(--accent); }
  .mock-big-number { margin: 22px 0; font: 600 76px/.8 var(--font-mono); letter-spacing: -.1em; }
  .mock-big-number small { margin-left: 13px; color: var(--muted); font: 500 12px/1 var(--font-ui); letter-spacing: 0; }
  .mock-specs { display: grid; grid-template-columns: repeat(2, 1fr); margin-bottom: 14px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
  .mock-specs div { padding: 11px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .mock-specs dt { color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .mock-specs dd { margin-top: 5px; font: 600 13px/1 var(--font-mono); }
  .mock-layout > .panel:not(.mock-start-panel) { padding: 21px; }
  .blueprint-list { display: flex; flex-direction: column; gap: 8px; margin-top: 18px; }
  .blueprint-row { display: grid; grid-template-columns: minmax(130px, 1fr) 1fr 28px; gap: 9px; align-items: center; }
  .blueprint-row span { overflow: hidden; color: var(--ink-2); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
  .blueprint-track { height: 4px; background: var(--surface-3); border-radius: 99px; }
  .blueprint-track i { display: block; height: 100%; background: var(--accent); border-radius: inherit; }
  .blueprint-row strong { font: 600 11px/1 var(--font-mono); text-align: right; }
  .fine-print { margin-top: 15px; color: var(--muted); font-size: 11px; line-height: 1.45; }
  .history-list { display: flex; flex-direction: column; gap: 0; margin-top: 10px; }
  .history-empty { padding: 25px 0; color: var(--muted); text-align: center; }
  .history-item { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 11px 0; border-top: 1px solid var(--line); }
  .history-item strong, .history-item span { display: block; }
  .history-item span { margin-top: 3px; color: var(--muted); font-size: 11px; }
  .history-score { font: 600 15px/1 var(--font-mono); }
  .mock-workspace { max-width: 1050px; margin: 0 auto; }
  .mock-topline { position: sticky; z-index: 12; top: calc(var(--topbar) + 10px); display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 13px 16px; margin-bottom: 12px; }
  .mock-topline strong { display: block; margin-top: 4px; }
  .mock-topline time { color: var(--accent); font: 600 25px/1 var(--font-mono); }
  .mock-result-card { max-width: 760px; padding: 35px; margin: 0 auto; text-align: left; }
  .result-score { font: 600 74px/1 var(--font-mono); letter-spacing: -.1em; }
  .result-score small { color: var(--muted); font-size: 20px; letter-spacing: 0; }
  .mock-review { margin-top: 26px; border-top: 1px solid var(--line); }
  .mock-review summary { padding: 18px 0; color: var(--accent); font-weight: 700; cursor: pointer; }
  .mock-review-list { display: grid; gap: 10px; }
  .mock-review-item { padding: 16px; background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius-sm); }
  .mock-review-item > span { color: var(--muted); font: 500 10px/1.3 var(--font-mono); text-transform: uppercase; }
  .mock-review-item h3 { margin: 9px 0 12px; font-size: 16px; }
  .mock-review-item p { margin-top: 7px; color: var(--ink-2); font-size: 13px; }

  .flashcard-stats { padding: 20px; }
  .flashcard-stats > strong, .flashcard-stats > span { display: block; }
  .flashcard-stats > strong { margin-top: 20px; color: var(--accent); font: 600 56px/1 var(--font-mono); letter-spacing: -.08em; }
  .flashcard-stats > span { margin-top: 5px; color: var(--muted); }
  .review-scale-legend { margin-top: 24px; padding-top: 14px; border-top: 1px solid var(--line); }
  .review-scale-legend p { display: flex; justify-content: space-between; padding: 4px 0; font-size: 12px; }
  .flashcard { min-height: 470px; padding: 28px; }
  .flashcard-meta { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font: 500 10px/1 var(--font-mono); text-transform: uppercase; }
  .card-face { display: flex; min-height: 270px; flex-direction: column; justify-content: center; }
  .card-face h3 { max-width: 620px; margin-top: 14px; font-family: var(--font-display); font-size: clamp(26px, 3vw, 40px); line-height: 1.25; }
  .card-back { min-height: 270px; }
  .card-back p { margin-top: 14px; color: var(--ink); font-size: 21px; line-height: 1.45; }
  .card-back aside { margin-top: 20px; padding: 12px 14px; color: var(--rust); background: var(--rust-soft); border-radius: var(--radius-sm); font-size: 13px; }
  .quality-buttons { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
  .quality-buttons button { min-height: 46px; padding: 7px; color: var(--ink-2); background: var(--surface-2); border: 1px solid var(--line); font-size: 11px; }
  .quality-buttons button:hover { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }

  .summary-nav { padding: 8px; }
  .summary-nav button { width: 100%; min-height: 41px; padding: 8px 10px; color: var(--muted); text-align: left; background: transparent; border: 0; border-radius: var(--radius-sm); }
  .summary-nav button:hover { color: var(--ink); background: var(--surface-2); }
  .summary-nav button.is-active { color: var(--accent-ink); background: var(--accent); }
  .summary-detail { padding: clamp(22px, 3vw, 38px); }
  .summary-header { display: flex; align-items: start; justify-content: space-between; gap: 15px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
  .summary-header h3 { margin-top: 7px; font-family: var(--font-display); font-size: 30px; }
  .summary-lead { max-width: 850px; margin-top: 21px; color: var(--ink); font-size: 19px; line-height: 1.55; }
  .summary-topic-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 23px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
  .summary-topic { min-height: 165px; padding: 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .summary-topic h4 { margin: 8px 0 6px; font-size: 16px; }
  .summary-topic p { font-size: 13px; }
  .summary-trap { margin-top: 10px; color: var(--rust) !important; }
  .cut-rule { margin-top: 20px; padding: 16px; background: var(--surface-2); border-radius: var(--radius-sm); }
  .cut-rule strong { color: var(--accent); }
  .cut-rule p { margin-top: 5px; }

  .essay-editor-panel, .essay-rubric { padding: 21px; }
  .editor-toolbar { display: flex; align-items: center; gap: 15px; margin: 10px 0; color: var(--muted); font: 500 11px/1 var(--font-mono); }
  .editor-toolbar .is-over-limit { color: var(--rust); font-weight: 700; }
  .editor-toolbar .text-button { margin-left: auto; }
  #essay-content { min-height: 520px; line-height: 1.8; }
  .essay-rubric { position: sticky; top: calc(var(--topbar) + 18px); }
  .essay-rubric h3 { margin: 7px 0 17px; }
  .essay-rubric label { display: grid; grid-template-columns: 18px 1fr; gap: 9px; align-items: start; padding: 10px 0; color: var(--ink-2); border-top: 1px solid var(--line); }
  .essay-rubric input { width: 17px; min-height: 17px; margin: 2px 0 0; accent-color: var(--accent); }
  .essay-score { display: flex; align-items: end; justify-content: space-between; gap: 12px; padding-top: 16px; margin-top: 8px; border-top: 1px solid var(--line); }
  .essay-score span { color: var(--muted); font: 500 10px/1 var(--font-mono); text-transform: uppercase; }
  .essay-score strong { font: 600 23px/1 var(--font-mono); }

  .taf-standard { padding: 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
  .taf-standard-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
  .taf-standard-header h3 { font-size: 18px; }
  .taf-standard-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 16px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
  .taf-standard-grid div { padding: 13px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .taf-standard-grid span, .taf-standard-grid strong { display: block; }
  .taf-standard-grid span { color: var(--muted); font: 500 9px/1.25 var(--font-mono); text-transform: uppercase; }
  .taf-standard-grid strong { margin-top: 7px; font: 600 18px/1 var(--font-mono); }
  .taf-form, .taf-history-panel, .taf-safety { padding: 22px; }
  .taf-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; margin: 20px 0 14px; }
  .taf-form label > span { display: block; margin-bottom: 5px; color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .taf-note-field { grid-column: 1 / -1; }
  .taf-evaluation { padding: 13px 14px; margin-bottom: 14px; color: var(--ink-2); background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius-sm); }
  .taf-evaluation.is-ready { color: var(--green); background: var(--green-soft); border-color: var(--green); }
  .taf-evaluation.is-below { color: var(--rust); background: var(--rust-soft); border-color: var(--rust); }
  .taf-history { display: flex; flex-direction: column; margin-top: 16px; }
  .taf-history-row { padding: 13px 0; border-top: 1px solid var(--line); }
  .taf-history-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
  .taf-history-top strong { font-size: 14px; }
  .taf-history-marks { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 7px; color: var(--muted); font: 500 10px/1.4 var(--font-mono); }
  .taf-history-row p { margin-top: 6px; font-size: 12px; }
  .taf-safety { display: flex; align-items: center; gap: 18px; margin-top: 18px; border-left-color: var(--accent); }
  .taf-safety p { max-width: 900px; }

  .error-method { margin-bottom: 17px; padding: 17px; }
  .error-method ol { display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; counter-reset: method; }
  .error-method li { padding: 0 16px; border-right: 1px solid var(--line); counter-increment: method; }
  .error-method li:last-child { border: 0; }
  .error-method b, .error-method span { display: block; }
  .error-method b::before { margin-right: 7px; color: var(--accent); font: 500 10px/1 var(--font-mono); content: "0" counter(method); }
  .error-method span { margin-top: 5px; color: var(--muted); font-size: 12px; }
  .error-list { display: flex; flex-direction: column; gap: 8px; }
  .error-row { display: grid; grid-template-columns: minmax(0, 1.3fr) 160px 120px auto; gap: 14px; align-items: center; padding: 15px 17px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
  .error-row h3 { overflow: hidden; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
  .error-row p { margin-top: 4px; font-size: 11px; }
  .error-stat span, .error-stat strong { display: block; }
  .error-stat span { color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }
  .error-stat strong { margin-top: 5px; font: 600 13px/1 var(--font-mono); }

  .methodology-panel, .cut-panel, .board-alerts, .source-ledger { padding: 23px; }
  .methodology-panel h3, .cut-panel h3 { margin-top: 8px; }
  .methodology-layers { display: flex; flex-direction: column; margin-top: 18px; counter-reset: layer; }
  .methodology-layer { display: grid; grid-template-columns: 35px 1fr; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); counter-increment: layer; }
  .methodology-layer::before { color: var(--accent); font: 600 11px/1.5 var(--font-mono); content: "0" counter(layer); }
  .method-warning { padding: 14px; margin-top: 15px; background: var(--accent-soft); border-radius: var(--radius-sm); }
  .method-warning strong { color: var(--accent); }
  .method-warning p { margin-top: 4px; }
  .research-downloads { margin-top: 16px; }
  .cut-panel ul { margin: 18px 0 0 19px; color: var(--ink-2); }
  .cut-panel li { margin: 8px 0; padding-left: 4px; }
  .cut-panel > p { margin-top: 17px; padding-top: 15px; border-top: 1px solid var(--line); }
  .board-alerts { margin-bottom: 18px; }
  .alert-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 17px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
  .alert-grid article { min-height: 130px; padding: 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .alert-grid p { margin-top: 7px; font-size: 13px; }
  .source-list { margin-top: 17px; }
  .source-item { display: grid; grid-template-columns: 38px minmax(0, 1fr) auto; gap: 14px; align-items: start; padding: 14px 0; border-top: 1px solid var(--line); }
  .source-number { color: var(--accent); font: 600 12px/1.5 var(--font-mono); }
  .source-item strong, .source-item span { display: block; }
  .source-item span { margin-top: 4px; color: var(--muted); font-size: 12px; }
  .source-kind { min-width: 105px; color: var(--ink-2); font: 500 9px/1 var(--font-mono); text-align: right; text-transform: uppercase; }
  .source-item a { color: var(--ink); text-decoration-color: var(--line-strong); text-underline-offset: 3px; }
  .source-item a:hover { color: var(--accent); }

  .admin-create-form, .admin-users-panel { padding: 23px; }
  .admin-create-form { display: flex; flex-direction: column; gap: 15px; }
  .admin-create-form .panel-heading { margin-bottom: 5px; }
  .admin-user-list { display: flex; flex-direction: column; margin-top: 15px; }
  .admin-user-row { display: grid; grid-template-columns: minmax(180px, 1fr) minmax(155px, .7fr) auto; gap: 16px; align-items: center; padding: 15px 0; border-top: 1px solid var(--line); }
  .admin-user-row strong, .admin-user-row span { display: block; }
  .admin-user-row > div:first-child span { margin-top: 3px; color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
  .admin-user-meta small { display: block; margin-top: 6px; color: var(--muted); font-size: 10px; }
  .credential-box { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 14px; align-items: center; padding: 16px; margin-top: 18px; background: var(--accent-soft); border: 1px solid var(--accent); border-radius: var(--radius); }
  .credential-box .eyebrow, .credential-box strong { grid-column: 1 / -1; }
  .credential-box code { min-width: 0; padding: 11px; overflow-x: auto; color: var(--ink); background: var(--bg); border-radius: var(--radius-sm); font: 600 14px/1 var(--font-mono); user-select: all; }

  .settings-dialog {
    width: min(520px, calc(100vw - 28px));
    padding: 0;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
  }
  .settings-dialog::backdrop { background: rgba(0,0,0,.66); backdrop-filter: blur(5px); }
  .settings-dialog form { display: flex; flex-direction: column; gap: 14px; padding: 24px; }
  .dialog-heading { display: flex; align-items: start; justify-content: space-between; gap: 15px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
  .dialog-heading h2 { margin-top: 6px; font-size: 28px; }
  .settings-dialog label > span { display: block; margin-bottom: 5px; color: var(--muted); font: 500 9px/1 var(--font-mono); text-transform: uppercase; }

  .toast {
    position: fixed;
    z-index: 300;
    right: 22px;
    bottom: 22px;
    max-width: 380px;
    padding: 12px 16px;
    color: var(--ink);
    background: var(--surface-3);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition);
  }
  .toast.is-visible { opacity: 1; transform: none; }
  .toast.is-error { border-color: var(--rust); }
}

@layer utilities {
  .is-hidden { display: none !important; }
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}

@layer responsive {
  @media (max-width: 1230px) {
    :root { --sidebar: 218px; }
    .mock-layout { grid-template-columns: 1fr 1.3fr; }
    .mock-layout > section:last-child { grid-column: 1 / -1; }
    .metric-ribbon { grid-template-columns: repeat(2, 1fr); }
    .metric:nth-child(2) { border-right: 0; }
    .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .alert-grid { grid-template-columns: repeat(2, 1fr); }
  }

  @media (max-width: 1020px) {
    :root { --sidebar: 0px; }
    .sidebar { width: 260px; transform: translateX(-102%); box-shadow: var(--shadow); transition: transform 220ms ease; }
    body.menu-open .sidebar { transform: none; }
    body.menu-open::after { position: fixed; z-index: 25; inset: 0; background: rgba(0,0,0,.52); content: ""; }
    .main-column { margin-left: 0; }
    .menu-toggle { display: inline-grid; place-items: center; }
    .menu-close { display: grid; place-items: center; }
    .today-layout, .heat-layout, .essay-layout, .taf-layout, .sources-layout { grid-template-columns: 1fr; }
    .today-aside { display: grid; grid-template-columns: repeat(2, 1fr); }
    .today-aside .compact-panel { grid-column: 1 / -1; }
    .heat-detail, .summary-nav, .essay-rubric { position: static; }
    .heat-table-wrap { overflow-x: auto; }
    .summary-layout { grid-template-columns: 220px minmax(0, 1fr); }
    .auth-screen, .admin-layout { grid-template-columns: 1fr; }
    .auth-context { display: none; }
    .auth-card { width: min(520px, 100%); margin: auto; }
  }

  @media (max-width: 760px) {
    :root { --topbar: 68px; }
    body { font-size: 14px; }
    .topbar { padding: 10px 14px; }
    .topbar-title .eyebrow, .topbar-actions .exam-chip, #quick-practice { display: none; }
    .topbar-title h1 { font-size: 24px; }
    .topbar-actions { gap: 6px; }
    main { padding: 22px 14px 55px; }
    .page-intro { align-items: start; flex-direction: column; gap: 16px; }
    .page-intro h2 { font-size: 31px; }
    .metric-ribbon { grid-template-columns: 1fr 1fr; }
    .metric { padding: 16px; }
    .metric > strong { font-size: 30px; }
    .today-aside { grid-template-columns: 1fr; }
    .today-aside .compact-panel { grid-column: auto; }
    .section-heading { align-items: start; flex-direction: column; }
    .task-card { grid-template-columns: 42px minmax(0, 1fr); gap: 12px; }
    .task-order { width: 40px; height: 40px; }
    .task-actions { grid-column: 1 / -1; justify-content: flex-end; }
    .task-subtopics { white-space: normal; }
    .phase-strip { display: flex; overflow-x: auto; padding-bottom: 5px; }
    .phase-item { min-width: 180px; }
    .schedule-day { grid-template-columns: 76px minmax(0, 1fr); }
    .schedule-date { padding: 13px 10px; }
    .schedule-date strong { font-size: 22px; }
    .schedule-tasks { grid-template-columns: 1fr; }
    .schedule-task { border-right: 0; border-bottom: 1px solid var(--line); }
    .schedule-task:last-child { border-bottom: 0; }
    .legend { flex-wrap: wrap; }
    .heat-table { min-width: 650px; }
    .filter-bar { align-items: stretch; flex-direction: column; }
    .filter-bar label { min-width: 0; }
    .filter-bar .check-filter { min-height: 35px; }
    .quiz-workspace { grid-template-columns: 1fr; }
    .quiz-rail { position: static; }
    .quiz-index { grid-template-columns: repeat(10, 1fr); }
    .question-card { padding: 19px; }
    .question-actions { align-items: stretch; flex-direction: column; }
    .keyboard-hint { display: none; }
    .question-actions .button { width: 100%; }
    .mock-layout, .flashcard-layout, .summary-layout { grid-template-columns: 1fr; }
    .mock-layout > section:last-child { grid-column: auto; }
    .mock-topline { top: calc(var(--topbar) + 4px); flex-wrap: wrap; }
    .mock-topline time { font-size: 20px; }
    .flashcard { min-height: 430px; }
    .quality-buttons { grid-template-columns: repeat(5, minmax(48px, 1fr)); overflow-x: auto; }
    .quality-buttons button { font-size: 9px; }
    .summary-nav { display: flex; overflow-x: auto; }
    .summary-nav button { min-width: max-content; }
    .summary-topic-grid { grid-template-columns: 1fr; }
    #essay-content { min-height: 410px; }
    .taf-standards, .taf-form-grid { grid-template-columns: 1fr; }
    .admin-user-row { grid-template-columns: 1fr; }
    .admin-user-row .inline-actions { justify-content: flex-start; }
    .credential-box { grid-template-columns: 1fr; }
    .credential-box .button { width: 100%; }
    .daily-subject-progress { grid-template-columns: 1fr; }
    .daily-subject-row { grid-template-columns: minmax(140px, 1fr) 70px auto; }
    .taf-note-field { grid-column: auto; }
    .taf-standard-grid { grid-template-columns: 1fr; }
    .taf-safety { align-items: flex-start; flex-direction: column; }
    .error-method ol { grid-template-columns: repeat(2, 1fr); }
    .error-method li { padding: 12px; border-bottom: 1px solid var(--line); }
    .error-method li:nth-child(2) { border-right: 0; }
    .error-method li:nth-last-child(-n+2) { border-bottom: 0; }
    .error-row { grid-template-columns: 1fr 1fr; }
    .error-row > div:first-child { grid-column: 1 / -1; }
    .alert-grid { grid-template-columns: 1fr; }
    .source-item { grid-template-columns: 30px minmax(0, 1fr); }
    .source-kind { grid-column: 2; text-align: left; }
  }

  @media (max-width: 460px) {
    .metric-ribbon { grid-template-columns: 1fr; }
    .metric { border-right: 0; border-bottom: 1px solid var(--line); }
    .metric:last-child { border-bottom: 0; }
    .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .empty-state { align-items: flex-start; flex-direction: column; }
    .empty-index { font-size: 54px; }
    .quiz-index { grid-template-columns: repeat(5, 1fr); }
    .error-method ol { grid-template-columns: 1fr; }
    .error-method li { border-right: 0; border-bottom: 1px solid var(--line) !important; }
    .error-method li:last-child { border-bottom: 0 !important; }
  }

  @media print {
    :root { color-scheme: light; }
    body { background: #fff !important; color: #111 !important; }
    .sidebar, .topbar, .summary-nav, .page-intro .button, .toast { display: none !important; }
    .main-column { margin: 0 !important; }
    .content { width: 100% !important; max-width: none !important; padding: 0 !important; }
    .view:not(.is-active) { display: none !important; }
    .summary-layout { display: block !important; }
    .summary-detail, .summary-topic, .cut-rule {
      color: #111 !important;
      background: #fff !important;
      border-color: #bbb !important;
      box-shadow: none !important;
    }
    a { color: #111 !important; text-decoration: underline; }
  }

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