@layer reset, base, components, modules, utilities;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { color-scheme: light; }
  body, h1, h2, h3, p { margin: 0; }
  img { display: block; max-width: 100%; }
  button, input, textarea { font: inherit; }
}

@layer base {
  :root {
    --ink: oklch(22% 0.035 258);
    --muted: oklch(52% 0.03 258);
    --line: oklch(89% 0.018 258);
    --surface: oklch(99% 0.006 255);
    --soft: oklch(96% 0.018 255);
    --primary: oklch(47% 0.17 262);
    --primary-dark: oklch(37% 0.15 262);
    --accent: oklch(91% 0.08 93);
    --danger: oklch(53% 0.2 27);
    --radius: 1.15rem;
    --shadow: 0 12px 38px oklch(24% 0.04 258 / 0.08);
  }

  body {
    min-height: 100vh;
    background:
      radial-gradient(circle at 15% 5%, oklch(93% 0.05 260 / .55), transparent 34rem),
      linear-gradient(180deg, var(--surface), oklch(97% 0.012 255));
    color: var(--ink);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.55;
  }

  a { color: inherit; text-decoration: none; }
  h1 { font-size: clamp(2.3rem, 6vw, 5.7rem); letter-spacing: -.065em; line-height: .98; }
  h2 { font-size: 1.25rem; letter-spacing: -.025em; line-height: 1.2; }
  h3 { font-size: 1rem; line-height: 1.3; }
  p { color: var(--muted); }
  input, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: .8rem;
    background: white;
    color: var(--ink);
    padding: .8rem .9rem;
    outline: none;
  }
  input:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px oklch(47% .17 262 / .12); }
}

@layer components {
  .container { width: min(1180px, calc(100% - 2rem)); margin-inline: auto; }
  .narrow { width: min(680px, calc(100% - 2rem)); }
  .page { min-height: calc(100vh - 12rem); padding-block: clamp(3rem, 7vw, 6rem); }
  .card { border: 1px solid var(--line); border-radius: var(--radius); background: oklch(100% 0 0 / .9); box-shadow: var(--shadow); }
  .button {
    display: inline-flex; min-height: 2.75rem; align-items: center; justify-content: center; border: 1px solid var(--primary);
    border-radius: .8rem; background: var(--primary); color: white; padding: .65rem 1rem; font-weight: 700; cursor: pointer;
  }
  .button:hover { background: var(--primary-dark); }
  .button.secondary { border-color: var(--line); background: white; color: var(--ink); }
  .button.secondary:hover { border-color: var(--primary); color: var(--primary); }
  .button.danger { border-color: var(--danger); background: var(--danger); }
  .button.small { min-height: 2.3rem; padding: .45rem .75rem; font-size: .88rem; }
  .button.full { width: 100%; }
  .link-button { border: 0; background: transparent; color: inherit; padding: 0; cursor: pointer; }
  .text-link { color: var(--primary); font-weight: 700; }
  .eyebrow { color: var(--primary); font-size: .76rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
  .badge { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; background: var(--soft); padding: .2rem .55rem; color: var(--muted); font-size: .72rem; font-weight: 700; }
  .badge.ready { color: oklch(44% .14 150); }
  .badge.error { color: var(--danger); }
  .stack { display: grid; gap: 1rem; }
  .actions { display: flex; flex-wrap: wrap; gap: .7rem; align-items: center; }
  .split { display: flex; justify-content: space-between; align-items: flex-start; gap: 1.5rem; }
  .field { display: grid; gap: .4rem; }
  .field label { font-weight: 700; font-size: .9rem; }
  .centered { text-align: center; }
}

@layer modules {
  .site-header {
    position: sticky; z-index: 20; top: 0; display: flex; align-items: center; justify-content: space-between;
    border-bottom: 1px solid oklch(89% .018 258 / .7); background: oklch(99% .006 255 / .82);
    padding: .8rem max(1rem, calc((100vw - 1180px) / 2)); backdrop-filter: blur(18px);
  }
  .brand { display: flex; align-items: center; gap: .6rem; font-weight: 800; letter-spacing: -.03em; }
  .brand img { border-radius: .65rem; }
  .site-header nav { display: flex; align-items: center; gap: 1rem; font-size: .9rem; font-weight: 650; }
  .site-header form { display: contents; }
  .site-footer { display: flex; justify-content: space-between; border-top: 1px solid var(--line); padding: 2rem max(1rem, calc((100vw - 1180px) / 2)); color: var(--muted); font-size: .8rem; }
  .flash { position: fixed; z-index: 30; top: 5rem; left: 50%; transform: translateX(-50%); border-radius: .8rem; padding: .7rem 1rem; box-shadow: var(--shadow); }
  .flash.notice { background: var(--ink); color: white; }
  .flash.alert { background: var(--danger); color: white; }

  .hero { position: relative; display: grid; min-height: min(730px, calc(100vh - 3.25rem)); overflow: hidden; align-items: center; isolation: isolate; }
  .hero-image, .hero-overlay { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; }
  .hero-image { object-fit: cover; object-position: center; }
  .hero-overlay { z-index: -1; background: linear-gradient(90deg, oklch(98% .012 255 / .95) 0%, oklch(98% .012 255 / .76) 49%, oklch(98% .012 255 / .15) 100%); }
  .hero-content { width: min(1180px, calc(100% - 2rem)); }
  .hero-copy { max-width: 700px; padding-block: clamp(5rem, 12vw, 9rem); }
  .hero h1 { max-width: 680px; margin-top: 1rem; font-size: clamp(3.1rem, 7vw, 6.3rem); }
  .hero-copy > p:not(.hero-note) { max-width: 610px; margin-top: 1.5rem; font-size: clamp(1.05rem, 2vw, 1.28rem); }
  .hero .actions { margin-top: 2rem; }
  .hero-link { padding: .65rem .25rem; }
  .hero-note { margin-top: .85rem; font-size: .82rem; }
  .intro { max-width: 780px; padding-top: clamp(4.5rem, 9vw, 8rem); }
  .section-kicker { color: var(--primary); font-size: .78rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
  .intro h2, .closing h2 { margin-top: .8rem; font-size: clamp(2rem, 4vw, 3.35rem); letter-spacing: -.055em; line-height: 1.04; }
  .features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 3rem; border-block: 1px solid var(--line); }
  .feature { padding: 2rem 2rem 2.4rem; }
  .feature + .feature { border-left: 1px solid var(--line); }
  .feature h2 { margin: 1.5rem 0 .65rem; }
  .step { color: var(--primary); font-family: ui-monospace, monospace; font-size: .75rem; font-weight: 700; }
  .closing { display: flex; align-items: end; justify-content: space-between; gap: 2rem; padding-block: clamp(4.5rem, 9vw, 7rem); }

  .page-heading { margin-bottom: 2rem; }
  .page-heading h1 { margin-top: .45rem; font-size: clamp(2.4rem, 6vw, 4rem); }
  .page-heading p { margin-top: .7rem; }
  .form-card, .auth-card { display: grid; gap: 1.25rem; padding: clamp(1.5rem, 5vw, 2.5rem); }
  .auth-card h1, .form-card h1 { font-size: clamp(2rem, 8vw, 3.2rem); }
  .pricing-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
  .price-card { display: grid; align-content: start; gap: 1rem; padding: 2rem; }
  .price-card.featured { border-color: var(--primary); }
  .price { min-height: 3.5rem; color: var(--ink); font-size: 2rem; font-weight: 800; letter-spacing: -.04em; }
  .course-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
  .course-card { display: grid; min-height: 230px; align-content: start; gap: .8rem; padding: 1.4rem; transition: transform .2s, border-color .2s; }
  .course-card:hover { transform: translateY(-3px); border-color: var(--primary); }
  .course-card .text-link { margin-top: auto; }
  .empty { padding: 3rem; text-align: center; }
  .empty p { margin: .6rem 0 1.4rem; }

  .chat { overflow: hidden; }
  .chat-header { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); padding: 1rem 1.25rem; }
  .chat-header p { font-size: .83rem; }
  .status-dot { color: var(--muted); font-size: .75rem; }
  .status-dot::before { content: ""; display: inline-block; width: .48rem; height: .48rem; margin-right: .35rem; border-radius: 50%; background: oklch(67% .18 150); }
  .messages { display: flex; min-height: 270px; max-height: 520px; flex-direction: column; gap: 1rem; overflow-y: auto; padding: 1.25rem; background: var(--soft); }
  .chat-empty { display: grid; flex: 1; place-content: center; gap: .25rem; color: var(--muted); text-align: center; }
  .message { display: grid; max-width: 82%; gap: .4rem; }
  .message.user { align-self: flex-end; }
  .message.assistant { align-self: flex-start; }
  .bubble { border: 1px solid var(--line); border-radius: 1rem; background: white; padding: .75rem 1rem; white-space: pre-wrap; }
  .message.user .bubble { border-color: var(--primary); background: var(--primary); color: white; }
  .citation-list { display: flex; flex-wrap: wrap; gap: .3rem; }
  .chat-form { display: flex; gap: .6rem; padding: .8rem; }
  .chat-form input { flex: 1; }
  .dashboard-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 1rem; margin-top: 1rem; }
  .readiness, .recommendation { padding: 1.3rem; }
  .readiness { background: var(--primary); color: white; }
  .readiness p { color: oklch(95% .02 255 / .8); }
  .score { margin: 1rem 0; font-size: 3rem; font-weight: 800; line-height: 1; }
  .score small { font-size: 1.2rem; }
  .progress { height: .45rem; overflow: hidden; border-radius: 99px; background: oklch(100% 0 0 / .2); }
  .progress span { display: block; height: 100%; border-radius: inherit; background: var(--accent); }
  .recommendation h2 { margin: .7rem 0 .4rem; }
  .recommendation form { margin-top: 1rem; }
  .section { margin-top: 3rem; }
  .section-heading { margin-bottom: 1rem; }
  .upload { display: flex; align-items: center; gap: .75rem; border: 1px dashed var(--line); border-radius: 1rem; background: white; padding: 1rem; }
  .upload input { border: 0; padding: 0; }
  .document-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin-top: 1rem; }
  .document-card { display: grid; overflow: hidden; gap: .8rem; padding: .8rem; }
  .document-cover { display: grid; aspect-ratio: 4 / 3; place-items: center; border-radius: .8rem; background: linear-gradient(145deg, var(--soft), oklch(90% .05 260)); color: var(--primary); font-weight: 900; }
  .document-card h3 { overflow: hidden; margin-top: .4rem; text-overflow: ellipsis; white-space: nowrap; }
  .document-card p { font-size: .78rem; }
  .danger-text, .error-text { color: var(--danger) !important; }
  .callout { border-radius: .8rem; background: var(--accent); padding: .8rem 1rem; }
  .practice-list { display: grid; gap: .6rem; }
  .practice-row { display: flex; align-items: center; justify-content: space-between; padding: 1rem; }
  .practice-form { gap: 1.25rem; }
  .question { margin: 0; padding: 1.3rem; }
  .question legend { display: flex; gap: .7rem; padding-inline: .3rem; font-weight: 750; }
  .question legend span { color: var(--primary); }
  .choice { display: flex; align-items: center; gap: .7rem; margin-top: .7rem; border: 1px solid var(--line); border-radius: .8rem; padding: .75rem; cursor: pointer; }
  .choice:has(input:checked) { border-color: var(--primary); background: var(--soft); }
  .choice input { width: auto; }
}

@layer utilities {
  @media (max-width: 800px) {
    .features, .pricing-grid, .course-grid, .dashboard-grid { grid-template-columns: 1fr; }
    .hero-overlay { background: linear-gradient(90deg, oklch(98% .012 255 / .92), oklch(98% .012 255 / .55)); }
    .feature + .feature { border-top: 1px solid var(--line); border-left: 0; }
    .closing { align-items: flex-start; flex-direction: column; }
    .document-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .site-header nav > a:not(.button), .site-header nav > form { display: none; }
    .split { align-items: stretch; flex-direction: column; }
    .site-footer { gap: .5rem; flex-direction: column; }
  }
  @media (max-width: 480px) {
    .document-grid { grid-template-columns: 1fr; }
    .chat-form { align-items: stretch; flex-direction: column; }
    .message { max-width: 95%; }
  }
}