*,*::before,*::after { box-sizing: border-box; }
  html, body { margin: 0; padding: 0; scroll-behavior: smooth; }
  :root {
    --ink: #0a0a0a;
    --ink-2: #1a1a1a;
    --ink-3: #4a4a4a;
    --muted: #707070;
    --line: #e8e8e8;
    --line-2: #f0f0f0;
    --bg: #ffffff;
    --bg-2: #fafafa;
    --bg-3: #f5f1ea;
    --bronze: #a88420;
    --bronze-light: #c9a44a;
    --bronze-soft: #f7efd7;
    --copper: #8a6818;
    --gold-grad: linear-gradient(135deg, #a88420, #8a6818);
  }
  body {
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--ink); background: var(--bg-2);
    font-size: 16px; line-height: 1.55;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }

  /* Picker bar */
  .picker-bar {
    position: sticky; top: 0; z-index: 200;
    background: #050505; color: white;
    padding: 14px 0; border-bottom: 1px solid #1a1a1a;
  }
  .picker-inner {
    max-width: 1280px; margin: 0 auto; padding: 0 32px;
    display: flex; gap: 18px; align-items: center; flex-wrap: wrap;
  }
  .picker-title { font-weight: 700; font-size: 14px; }
  .picker-title span { color: var(--bronze); }
  .step-jump { display: flex; gap: 4px; flex-wrap: wrap; }
  .step-jump a {
    padding: 6px 10px; font-size: 11.5px;
    background: rgba(255,255,255,0.06);
    color: rgba(255,255,255,0.7);
    border-radius: 3px;
    border: 1px solid rgba(255,255,255,0.1);
    font-family: 'IBM Plex Mono', monospace;
    letter-spacing: 0.04em;
  }
  .step-jump a:hover { color: white; background: rgba(168, 132, 32, 0.2); border-color: var(--bronze); }
  .picker-source { margin-left: auto; font-size: 12px; color: rgba(255,255,255,0.5); font-family: 'IBM Plex Mono', monospace; }

  .step {
    padding: 80px 0 64px;
    border-bottom: 1px solid var(--line);
    background: white;
    scroll-margin-top: 80px;
  }
  .step.tinted { background: var(--bg-3); }
  .step.dark { background: var(--ink); color: white; border-bottom-color: #1f1f1f; }
  .step-container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
  .step-head {
    display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px;
    margin-bottom: 48px; align-items: end;
  }
  .step-head .num {
    font-family: 'Fraunces', serif;
    font-weight: 400; font-size: 16px;
    color: var(--bronze); letter-spacing: 0.16em;
    margin-bottom: 14px;
  }
  .step-head .num::before {
    content: 'STEP · ';
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px; color: var(--muted);
  }
  .step-head h2 {
    font-family: 'Fraunces', serif;
    font-weight: 500; font-size: 56px; line-height: 1.05;
    letter-spacing: -0.025em; margin: 0 0 12px;
  }
  .step-head h2 em { font-style: italic; font-weight: 400; color: var(--bronze); }
  .step.dark .step-head h2 { color: white; }
  .step-head .blurb {
    font-size: 16px; color: var(--ink-3);
    line-height: 1.6; margin: 0;
  }
  .step.dark .step-head .blurb { color: rgba(255,255,255,0.65); }
  .step-route {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11.5px; letter-spacing: 0.06em;
    color: var(--muted);
    background: var(--bg-2);
    padding: 8px 14px; border-radius: 4px;
    border-left: 3px solid var(--bronze);
    margin-top: 16px;
    display: inline-block;
  }
  .step-notes {
    margin-top: 24px;
    background: rgba(168, 132, 32, 0.06);
    border-left: 3px solid var(--bronze);
    padding: 16px 20px;
    border-radius: 0 6px 6px 0;
    font-size: 13.5px;
    color: var(--ink-3);
    line-height: 1.6;
  }
  .step-notes b { color: var(--bronze); }
  .step-notes code {
    background: var(--bg-3); color: var(--copper);
    padding: 1px 6px; border-radius: 3px; font-size: 12px;
    font-family: 'IBM Plex Mono', monospace;
  }
  .mockup {
    background: white; border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 30px 80px -40px rgba(0,0,0,0.15);
    overflow: hidden;
  }
  .mockup-frame {
    background: var(--bg-2);
    padding: 8px;
    display: flex; gap: 6px; align-items: center;
    border-bottom: 1px solid var(--line);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px; color: var(--muted);
  }
  .mockup-frame .dot { width: 10px; height: 10px; border-radius: 50%; }
  .mockup-frame .dot.r { background: #ff5f57; }
  .mockup-frame .dot.y { background: #febc2e; }
  .mockup-frame .dot.g { background: #28c840; }
  .mockup-frame .url {
    margin-left: 12px;
    background: white;
    padding: 5px 12px;
    border-radius: 4px;
    color: var(--ink-3);
    flex: 1; max-width: 600px;
  }

  .lab {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--bronze); font-weight: 700;
  }

  /* Step 1: Dashboard */
  .dash-hero {
    padding: 36px 32px;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, var(--bg-3), white);
    display: flex; justify-content: space-between; align-items: start; flex-wrap: wrap; gap: 20px;
  }
  .dash-hero h3 {
    font-family: 'Fraunces', serif; font-weight: 500;
    font-size: 36px; letter-spacing: -0.02em; margin: 4px 0 6px;
  }
  .dash-hero p { color: var(--ink-3); margin: 0; font-size: 14px; }
  .dash-actions { display: flex; gap: 8px; flex-wrap: wrap; }
  .dash-actions .btn-primary {
    background: var(--bronze); color: white;
    padding: 11px 20px; border-radius: 4px;
    font-size: 13.5px; font-weight: 600;
  }
  .dash-actions .btn-ghost {
    border: 1px solid var(--line); color: var(--ink);
    padding: 10px 20px; border-radius: 4px;
    font-size: 13.5px; font-weight: 500;
    background: white;
  }
  .dash-grid {
    display: grid; grid-template-columns: 2fr 1fr; gap: 32px;
    padding: 32px;
  }
  .dash-section h4 {
    font-family: 'Fraunces', serif; font-weight: 500; font-size: 20px;
    margin: 0 0 14px; letter-spacing: -0.01em;
  }
  .briefs-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
  }
  .brief-card {
    background: white; border: 1px solid var(--line);
    border-radius: 8px; padding: 18px;
    transition: border-color 0.15s, box-shadow 0.15s;
  }
  .brief-card:hover { border-color: var(--bronze); box-shadow: 0 4px 12px -4px rgba(0,0,0,0.1); }
  .brief-card .pill {
    font-size: 9.5px; font-family: 'IBM Plex Mono', monospace;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--bronze); margin-bottom: 6px; display: inline-block;
  }
  .brief-card h5 { font-family: 'Fraunces', serif; font-weight: 500; font-size: 15.5px; margin: 0 0 8px; line-height: 1.3; }
  .brief-card p { font-size: 12.5px; color: var(--ink-3); line-height: 1.5; margin: 0 0 12px; }
  .brief-card .meta { font-size: 11px; color: var(--muted); display: flex; gap: 8px; font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.04em; }
  .saved-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
    margin-top: 28px;
  }
  .saved-card {
    background: white; border: 1px solid var(--line);
    border-radius: 6px; padding: 12px; cursor: pointer;
  }
  .saved-card:hover { border-color: var(--bronze); }
  .saved-card .name { font-weight: 700; font-size: 13px; margin-bottom: 2px; }
  .saved-card .loc { font-size: 10.5px; color: var(--muted); font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.04em; }
  .searches-list {
    background: white; border: 1px solid var(--line);
    border-radius: 8px; padding: 4px;
  }
  .searches-list a {
    display: block; padding: 12px 14px;
    border-bottom: 1px solid var(--line-2);
  }
  .searches-list a:last-child { border-bottom: 0; }
  .searches-list a:hover { background: var(--bg-2); }
  .searches-list .q {
    font-size: 13.5px; line-height: 1.4;
    color: var(--ink); margin-bottom: 4px;
  }
  .searches-list .when {
    font-size: 10.5px; color: var(--muted);
    font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.06em;
  }
  .privacy-block {
    margin-top: 24px;
    background: var(--bg-3); border: 1px solid var(--line);
    border-radius: 8px; padding: 16px;
    font-size: 12.5px; color: var(--ink-3); line-height: 1.55;
  }
  .privacy-block strong { color: var(--ink); }

  /* Step 2: Brief detail with chat */
  .brief-detail-mock { padding: 24px 32px; }
  .brief-detail-mock .crumb {
    font-size: 12px; color: var(--muted); margin-bottom: 8px;
    font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.04em;
  }
  .brief-detail-mock h3 {
    font-family: 'Fraunces', serif; font-weight: 500;
    font-size: 32px; line-height: 1.1; letter-spacing: -0.02em;
    margin: 4px 0 14px;
  }
  .brief-detail-mock .meta-row {
    display: flex; gap: 18px; flex-wrap: wrap;
    font-size: 12.5px; color: var(--ink-3);
    padding: 12px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
    margin-bottom: 24px;
  }
  .brief-detail-mock .meta-row .k { color: var(--muted); margin-right: 6px; font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; }
  .cat-card {
    background: var(--bg-2); border: 1px solid var(--line-2);
    border-radius: 8px; padding: 18px;
    margin-bottom: 14px;
  }
  .cat-card .cat-title {
    font-family: 'Fraunces', serif; font-weight: 500; font-size: 17px;
    margin: 0 0 4px;
  }
  .cat-card .cat-spec {
    font-size: 12px; color: var(--muted); font-style: italic; margin: 0 0 10px;
  }
  .cat-card .shortlist {
    display: flex; flex-direction: column; gap: 8px;
  }
  .cat-card .sl-item {
    display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center;
    background: white; padding: 10px 14px; border-radius: 4px;
    font-size: 13px; border: 1px solid var(--line);
  }
  .cat-card .sl-rank {
    font-family: 'Fraunces', serif; font-size: 18px; color: var(--bronze); font-weight: 500; min-width: 24px;
  }
  .cat-card .sl-name { font-weight: 600; }
  .cat-card .sl-rationale { font-size: 11.5px; color: var(--muted); margin-top: 1px; }
  .cat-card .sl-cta { font-size: 11px; color: var(--bronze); font-weight: 600; }

  /* Step 3: Refinement chat */
  .chat-block {
    background: white; border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
    box-shadow: 0 30px 80px -40px rgba(0,0,0,0.1);
  }
  .chat-head {
    padding: 16px 22px; background: var(--bg-2); border-bottom: 1px solid var(--line);
  }
  .chat-head .lab { display: block; margin-bottom: 4px; }
  .chat-head .ttl {
    font-family: 'Fraunces', serif; font-weight: 500; font-size: 16px;
  }
  .chat-thread {
    padding: 24px 22px;
    display: flex; flex-direction: column; gap: 20px;
  }
  .chat-msg { display: flex; gap: 12px; align-items: flex-start; }
  .chat-msg .av {
    width: 32px; height: 32px; border-radius: 50%;
    flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px; font-weight: 700;
    color: white;
  }
  .chat-msg.buyer .av { background: var(--ink); }
  .chat-msg.souk .av { background: var(--gold-grad); }
  .chat-msg .body { flex: 1; min-width: 0; }
  .chat-msg .lab-mini {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px; letter-spacing: 0.12em;
    color: var(--muted); text-transform: uppercase;
    margin-bottom: 5px;
  }
  .chat-msg .bubble {
    font-size: 14px; line-height: 1.55;
    border-radius: 8px; padding: 12px 16px;
  }
  .chat-msg.buyer .bubble { background: var(--bg-2); color: var(--ink); }
  .chat-msg.souk .bubble {
    background: white; color: var(--ink);
    border: 1px solid rgba(168, 132, 32, 0.25);
  }
  .chat-input-row {
    border-top: 1px solid var(--line);
    padding: 16px 22px;
  }
  .chat-input-row .ti {
    background: var(--bg-2);
    border: 1px solid var(--line); border-radius: 4px;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--muted); min-height: 60px;
    margin-bottom: 8px;
  }
  .chat-input-row .ti b { color: var(--ink); display: block; margin-bottom: 6px; font-style: normal; font-weight: normal; }
  .chat-input-row .actions { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
  .chat-input-row .send {
    background: var(--bronze); color: white;
    padding: 10px 24px; border-radius: 4px;
    font-size: 13px; font-weight: 600;
    border: 0; cursor: pointer;
  }
  .chat-input-row .privacy-note {
    font-size: 10.5px; color: var(--muted);
    font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.04em;
  }

  /* Step 4: settings */
  .settings-form { padding: 32px; max-width: 640px; margin: 0 auto; }
  .settings-form .field { margin-bottom: 20px; }
  .settings-form label {
    display: block; font-size: 11px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.12em;
    color: var(--muted); margin-bottom: 6px;
    font-family: 'IBM Plex Mono', monospace;
  }
  .settings-form input, .settings-form select {
    width: 100%; padding: 11px 14px;
    background: var(--bg-2); border: 1px solid var(--line);
    border-radius: 4px; outline: none;
    font-family: inherit; font-size: 14px;
  }
  .settings-form .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .settings-form .checkbox-row {
    display: flex; align-items: flex-start; gap: 10px;
    padding-top: 12px; border-top: 1px solid var(--line);
    font-size: 13px;
    color: var(--ink-3);
  }
  .settings-form .row-actions {
    display: flex; gap: 10px; padding-top: 16px;
    border-top: 1px solid var(--line); align-items: center;
  }
  .settings-form .save-btn {
    background: var(--bronze); color: white; padding: 11px 22px;
    border-radius: 4px; font-weight: 600; font-size: 13.5px;
    border: 0;
  }
  .settings-form .ghost {
    border: 1px solid var(--line); padding: 10px 22px;
    border-radius: 4px; font-size: 13.5px; font-weight: 500;
    background: white;
  }

  /* Step 5: save button on supplier page */
  .supplier-mock {
    padding: 24px 32px;
    background: linear-gradient(180deg, var(--bg-3), white);
  }
  .supplier-mock h3 {
    font-family: 'Fraunces', serif; font-weight: 500;
    font-size: 38px; letter-spacing: -0.02em;
    margin: 0 0 8px;
  }
  .supplier-mock .sub {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px; color: var(--muted); letter-spacing: 0.04em;
    margin-bottom: 20px;
  }
  .supplier-mock .ctas {
    display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
  }
  .supplier-mock .ep-btn-primary {
    background: var(--ink); color: white; padding: 10px 18px;
    border-radius: 4px; font-size: 13px; font-weight: 600;
  }
  .supplier-mock .ep-btn-accent {
    background: var(--bronze); color: white; padding: 10px 18px;
    border-radius: 4px; font-size: 13px; font-weight: 600;
  }
  .supplier-mock .save-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 14px; border-radius: 4px;
    font-size: 12.5px; font-weight: 600;
    background: white; border: 1px solid var(--line);
    color: var(--ink);
  }
  .supplier-mock .save-btn.saved {
    background: var(--bronze); color: white; border-color: var(--bronze);
  }
  .supplier-mock .save-btn svg { width: 14px; height: 14px; }

  @media (max-width: 1024px) {
    .step-head { grid-template-columns: 1fr; gap: 24px; }
    .step-head h2 { font-size: 40px; }
    .dash-grid { grid-template-columns: 1fr; }
    .briefs-grid, .saved-grid, .settings-form .grid-2 { grid-template-columns: 1fr; }
  }