:root {
    /* Backgrounds */
    --bg: #FFFFFF;
    --bg-2: #F7F7F8;
    --bg-3: #EEEEF0;
    --bg-card: #FFFFFF;

    /* Ink */
    --ink: #0B0B0C;
    --ink-2: #36363A;
    --ink-3: #70707A;
    --ink-4: #A3A3A8;

    /* Lines */
    --line: #E5E5E7;
    --line-2: #F0F0F2;
    --line-3: #F6F6F8;

    /* Single accent — deep confident blue */
    /* Brand identity: Deep Indigo anchor + Electric Cyan pop */
    --accent: #1E2A5E;
    --accent-2: #0A0E27;
    --accent-bg: rgba(30,42,94,0.06);
    --accent-line: rgba(30,42,94,0.18);
    --accent-bright: #00D4E8;

    /* System colors */
    --ok: #15803D;
    --ok-bg: rgba(21,128,61,0.08);
    --warn: #B91C1C;
    --warn-bg: rgba(185,28,28,0.06);

    /* Dashboard neutrals */
    --dash-bg: #FFFFFF;
    --dash-side: #F9F9FA;
    --dash-bar: #FBFBFC;
    --dash-border: #ECECEE;
    --dash-card: #FAFAFB;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.03);
    --shadow-md: 0 4px 12px rgba(10,10,20,0.04), 0 1px 3px rgba(10,10,20,0.04);
    --shadow-lg: 0 12px 32px -4px rgba(10,10,20,0.06), 0 4px 8px rgba(10,10,20,0.03);
    --shadow-xl: 0 32px 64px -16px rgba(10,10,20,0.1), 0 8px 16px rgba(10,10,20,0.04);

    /* Fonts */
    --sans: "Inter", "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    font-family: var(--sans);
    background: var(--bg);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "ss01", "ss02", "cv01", "cv02";
    line-height: 1.55;
    word-break: keep-all;
    overflow-wrap: break-word;
    overflow-x: hidden;
    font-size: 15px;
  }
  .mono, code { word-break: normal; font-family: var(--mono); }

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

  /* ─── NAV ─────────────────────────────── */
  nav.top {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--bg) 80%, transparent);
    backdrop-filter: blur(16px) saturate(1.4);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    border-bottom: 1px solid var(--line-2);
  }
  nav.top .row {
    max-width: 1320px;
    margin: 0 auto;
    padding: 16px 40px;
    display: flex; align-items: center; justify-content: space-between;
  }
  .logo {
    display: inline-flex;
    align-items: center;
    font-family: "Satoshi", var(--sans);
    font-weight: 900;
    font-size: 24px;
    letter-spacing: -0.04em;
    line-height: 1;
    text-decoration: none;
    color: var(--ink);
  }
  .logo-mark {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    margin-right: 8px;
    border-radius: 5px;
  }
  .logo-wize { color: var(--ink); }
  .logo-plug { color: #00D4E8; }
  /* On dark backgrounds */
  footer .logo-wize { color: var(--bg); }
  nav.top ul {
    list-style: none;
    display: flex; gap: 36px;
    margin: 0; padding: 0;
    font-size: 15px;
    font-weight: 500;
  }
  nav.top ul a {
    color: var(--ink-2);
    text-decoration: none;
    transition: color 0.15s;
  }
  nav.top ul a:hover { color: var(--ink); }
  nav.top ul a.active { color: var(--ink); font-weight: 600; }
  nav.top .cta {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 18px;
    background: var(--ink);
    color: var(--bg);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    transition: background 0.15s;
  }
  nav.top .cta:hover { background: var(--accent-2); }
  nav.top .cta svg { width: 12px; height: 12px; }

  @media (max-width: 860px) {
    nav.top ul { display: none; }
    nav.top .row { padding: 14px 22px; }
  }

  /* ─── HERO ─────────────────────────────── */
  section.hero {
    max-width: 1280px;
    margin: 0 auto;
    padding: 120px 40px 96px;
  }
  .hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 80px;
    align-items: center;
    margin-bottom: 112px;
  }
  .hero-content { min-width: 0; }
  .hero-eyebrow {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 6px 12px;
    background: var(--accent-bg);
    border-radius: 999px;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.12em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 36px;
    font-weight: 500;
  }
  .hero-eyebrow::before {
    content: ""; width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent);
  }
  h1.hero-title {
    font-weight: 700;
    font-size: clamp(44px, 5.2vw, 76px);
    line-height: 1.04;
    letter-spacing: -0.04em;
    color: var(--ink);
    margin: 0 0 28px;
  }
  .hero-sub {
    font-size: 19px;
    line-height: 1.6;
    color: var(--ink-3);
    margin: 0 0 40px;
    letter-spacing: -0.01em;
  }
  .hero-sub b {
    font-weight: 600;
    color: var(--ink-2);
  }
  .hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }
  .btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 22px;
    background: var(--ink);
    color: var(--bg);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: 10px;
    transition: background 0.15s, transform 0.15s;
  }
  .btn-primary:hover { background: var(--accent-2); transform: translateY(-1px); }
  .btn-ghost {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 22px;
    border: 1px solid var(--line);
    color: var(--ink);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: 10px;
    background: var(--bg-card);
    transition: border-color 0.15s, background 0.15s;
  }
  .btn-ghost:hover { border-color: var(--ink-3); background: var(--bg); }

  /* ─── HERO MOTION DEMO ───────────────── */
  .hero-viz {
    position: relative;
    perspective: 1200px;
  }
  .demo-frame {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    font-size: 13px;
    line-height: 1.55;
    transform: translateZ(0);
  }
  .demo-frame::before {
    content: "";
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 0%, var(--accent-bg) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.6;
  }

  .demo-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--line-2);
    background: color-mix(in srgb, var(--bg-card) 85%, var(--bg-2));
    position: relative; z-index: 1;
  }
  .demo-brand {
    display: flex; align-items: center; gap: 9px;
    font-weight: 700;
    font-size: 13.5px;
    letter-spacing: -0.015em;
  }
  .live-dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--ok);
    position: relative;
  }
  .live-dot::before {
    content: ""; position: absolute; inset: -4px;
    border-radius: 50%;
    background: var(--ok);
    opacity: 0.3;
    animation: live-ping 2s ease-out infinite;
  }
  @keyframes live-ping {
    0% { transform: scale(0.5); opacity: 0.5; }
    100% { transform: scale(1.6); opacity: 0; }
  }
  .demo-sep {
    width: 1px; height: 12px;
    background: var(--line);
    margin: 0 2px;
  }
  .demo-mono {
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.08em;
    color: var(--ink-3);
    text-transform: uppercase;
  }
  .demo-net { font-weight: 500; }
  .demo-net .demo-mono { color: var(--ok); }

  /* Scenario indicator bar */
  .demo-scenario-bar {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 16px;
    background: var(--bg);
    border-bottom: 1px solid var(--line-2);
    position: relative; z-index: 1;
  }
  .demo-scenario-dots {
    display: inline-flex; gap: 5px;
  }
  .sdot {
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--ink-4);
    opacity: 0.35;
    transition: opacity 0.3s, background 0.3s, transform 0.3s;
  }
  .sdot.on {
    opacity: 1;
    background: var(--accent);
    transform: scale(1.2);
  }
  [data-slot="scenario-label"] {
    color: var(--ink-3) !important;
    font-size: 10px;
    transition: opacity 0.3s;
  }

  .demo-body {
    padding: 20px 18px 16px;
    min-height: 320px;
    position: relative;
    z-index: 1;
  }
  .demo-msg {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.5s cubic-bezier(0.2, 0.6, 0.2, 1),
                transform 0.5s cubic-bezier(0.2, 0.6, 0.2, 1);
    margin-bottom: 18px;
  }
  .demo-msg.visible {
    opacity: 1;
    transform: translateY(0);
  }
  .demo-role {
    display: flex; align-items: center; gap: 8px;
    font-family: var(--mono);
    font-size: 9.5px;
    letter-spacing: 0.14em;
    color: var(--ink-4);
    text-transform: uppercase;
    margin-bottom: 8px;
  }
  .demo-av {
    width: 20px; height: 20px;
    border-radius: 4px;
    display: grid; place-items: center;
    font-family: var(--sans);
    font-size: 9.5px;
    font-weight: 600;
    letter-spacing: 0;
  }
  .demo-av-user { background: var(--ink); color: var(--bg); }
  .demo-av-ai { background: var(--accent); color: #fff; }
  .demo-time {
    margin-left: auto;
    font-family: var(--mono);
    color: var(--ink-4);
    letter-spacing: 0.08em;
  }

  .demo-q .demo-text {
    color: var(--ink-2);
    font-size: 13px;
    letter-spacing: -0.005em;
    padding-left: 28px;
  }
  .demo-caret {
    display: inline-block;
    color: var(--accent);
    margin-left: 2px;
    animation: caret-blink 0.9s steps(2) infinite;
  }
  @keyframes caret-blink {
    0%, 50% { opacity: 1; }
    50.01%, 100% { opacity: 0; }
  }
  .demo-msg.visible .demo-caret { display: none; }
  .demo-msg.active-typing .demo-caret { display: inline-block; }

  .demo-thinking {
    display: flex; align-items: center; gap: 10px;
  }
  .demo-thinking .demo-role { margin-bottom: 0; }
  .demo-dots {
    display: flex; gap: 4px;
    padding-left: 8px;
  }
  .demo-dots span {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--ink-4);
    animation: think-dot 1.2s ease-in-out infinite;
  }
  .demo-dots span:nth-child(2) { animation-delay: 0.15s; }
  .demo-dots span:nth-child(3) { animation-delay: 0.3s; }
  @keyframes think-dot {
    0%, 70%, 100% { opacity: 0.25; transform: scale(0.9); }
    35% { opacity: 1; transform: scale(1.1); background: var(--accent); }
  }

  .demo-a .demo-text {
    color: var(--ink);
    font-size: 13px;
    line-height: 1.6;
    letter-spacing: -0.005em;
    padding-left: 28px;
  }
  .demo-a .demo-text b { font-weight: 600; color: var(--ink); }
  .demo-line {
    display: block;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.5s, transform 0.5s;
    margin-bottom: 8px;
  }
  .demo-a.visible .demo-line-1 {
    transition-delay: 0.2s;
    opacity: 1; transform: translateY(0);
  }
  .demo-a.visible .demo-line-2 {
    transition-delay: 0.7s;
    opacity: 1; transform: translateY(0);
  }

  .demo-cite {
    display: inline-flex;
    align-items: center; justify-content: center;
    min-width: 16px; height: 16px;
    padding: 0 4px;
    background: var(--accent-bg);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 9.5px;
    font-weight: 600;
    border-radius: 3px;
    vertical-align: super;
    margin: 0 1px;
    line-height: 1;
    opacity: 0;
    transform: scale(0.4);
    transition: opacity 0.3s, transform 0.3s cubic-bezier(0.3, 1.5, 0.5, 1);
  }
  .demo-a.visible .demo-cite-1 { transition-delay: 1.3s; opacity: 1; transform: scale(1); }
  .demo-a.visible .demo-cite-2 { transition-delay: 1.5s; opacity: 1; transform: scale(1); }
  .demo-a.visible .demo-cite-3 { transition-delay: 1.7s; opacity: 1; transform: scale(1); }

  .demo-sources {
    margin-top: 14px;
    padding-left: 28px;
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .demo-src {
    display: flex; align-items: center; gap: 8px;
    padding: 6px 10px;
    background: var(--dash-card);
    border: 1px solid var(--dash-border);
    border-radius: 6px;
    font-size: 11.5px;
    color: var(--ink-2);
    letter-spacing: -0.005em;
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity 0.4s, transform 0.4s;
  }
  .demo-src-n {
    display: grid; place-items: center;
    width: 16px; height: 16px;
    background: var(--accent-bg);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 9.5px;
    font-weight: 600;
    border-radius: 3px;
  }
  .demo-src-ext {
    color: var(--ink-4);
    font-family: var(--mono);
    font-size: 10px;
    margin-left: auto;
  }
  .demo-a.visible .demo-src-1 { transition-delay: 2.0s; opacity: 1; transform: translateX(0); }
  .demo-a.visible .demo-src-2 { transition-delay: 2.15s; opacity: 1; transform: translateX(0); }
  .demo-a.visible .demo-src-3 { transition-delay: 2.3s; opacity: 1; transform: translateX(0); }

  /* No-data variant (scenario 2: unique knowledge accumulation flow) */
  .demo-nodata {
    margin-top: 14px;
    padding-left: 28px;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.5s, transform 0.5s;
  }
  .demo-a.visible .demo-nodata {
    transition-delay: 2.0s;
    opacity: 1;
    transform: translateY(0);
  }
  .demo-nodata-alert {
    display: flex; align-items: flex-start; gap: 10px;
    padding: 11px 13px;
    background: var(--warn-bg);
    border: 1px solid color-mix(in srgb, var(--warn) 20%, transparent);
    border-radius: 7px;
    font-size: 11.5px;
    line-height: 1.55;
    color: var(--warn);
    margin-bottom: 6px;
    letter-spacing: -0.005em;
    font-weight: 500;
  }
  .demo-nodata-alert svg {
    width: 13px; height: 13px;
    flex-shrink: 0;
    margin-top: 1px;
  }
  .demo-nodata-cta {
    display: flex; align-items: center; justify-content: space-between;
    gap: 10px;
    padding: 10px 13px;
    background: var(--accent-bg);
    border: 1px solid var(--accent-line);
    border-radius: 7px;
    font-size: 11.5px;
    letter-spacing: -0.005em;
  }
  .demo-nodata-assignee {
    color: var(--ink-2);
    display: flex; align-items: center; gap: 8px;
  }
  .demo-nodata-assignee b {
    color: var(--ink); font-weight: 600;
  }
  .demo-nodata-assignee::before {
    content: ""; width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent);
  }
  .demo-nodata-btn {
    padding: 5px 10px;
    background: var(--ink);
    color: #fff;
    border-radius: 5px;
    font-weight: 500;
    font-size: 11px;
    white-space: nowrap;
  }

  .demo-foot {
    display: flex; align-items: center; gap: 16px;
    padding: 10px 16px;
    border-top: 1px solid var(--line-2);
    background: color-mix(in srgb, var(--bg-card) 85%, var(--bg-2));
    position: relative; z-index: 1;
  }
  .demo-foot .demo-mono { color: var(--ink-3); }
  .demo-foot .foot-tick { color: var(--ok); margin-right: 2px; }

  /* hero stats */
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    padding-top: 32px;
    border-top: 1px solid var(--line);
  }
  .stat { padding-right: 24px; }
  .stat:not(:last-child) { border-right: 1px solid var(--line-2); }
  .stat + .stat { padding-left: 24px; }
  .stat .num {
    font-size: 36px;
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1;
    color: var(--ink);
    margin-bottom: 8px;
    font-variant-numeric: tabular-nums;
  }
  .stat .num .unit {
    font-size: 18px;
    font-weight: 400;
    color: var(--ink-3);
    margin-left: 2px;
    letter-spacing: -0.01em;
  }
  .stat .label {
    font-size: 13px;
    color: var(--ink-3);
    letter-spacing: -0.005em;
    line-height: 1.4;
  }

  @media (max-width: 1000px) {
    .hero-grid { grid-template-columns: 1fr; gap: 48px; }
    .hero-viz { max-width: 560px; margin: 0 auto; width: 100%; }
  }
  @media (max-width: 860px) {
    section.hero { padding: 48px 22px 40px; }
    .hero-grid { margin-bottom: 56px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 28px; padding-top: 24px; }
    .stat:not(:last-child) { border-right: none; }
    .stat + .stat { padding-left: 0; }
    .stat { padding: 16px 0; border-bottom: 1px solid var(--line-2); }
    .demo-body { padding: 16px; min-height: 280px; }
    .demo-sources { padding-left: 0; }
    .demo-q .demo-text, .demo-a .demo-text { padding-left: 0; }
  }

  /* ─── SECTION PRIMITIVES ─────────── */
  section { position: relative; }
  .section-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 144px 40px;
  }
  .section-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--ink-3);
    text-transform: uppercase;
    margin-bottom: 24px;
    display: flex; align-items: center; gap: 10px;
    font-weight: 500;
  }
  .section-label::before {
    content: ""; width: 18px; height: 1px;
    background: var(--ink-3);
  }
  .section-title {
    font-size: clamp(36px, 4.2vw, 64px);
    line-height: 1.08;
    letter-spacing: -0.035em;
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 24px;
    max-width: 920px;
  }
  .section-lede {
    font-size: 19px;
    line-height: 1.6;
    color: var(--ink-3);
    max-width: 680px;
    margin: 0;
    letter-spacing: -0.005em;
  }
  .section-head { margin-bottom: 80px; }

  @media (max-width: 860px) {
    .section-inner { padding: 88px 22px; }
    .section-head { margin-bottom: 48px; }
    .section-title { font-size: clamp(30px, 7vw, 40px); }
    .section-lede { font-size: 17px; }
  }

  /* ─── PROBLEMS ─────────── */
  section.problems { background: var(--bg-2); border-top: 1px solid var(--line); }
  .problem-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
  }
  .problem {
    padding: 44px 36px 48px;
    background: var(--bg-card);
    transition: background 0.15s;
  }
  .problem:hover { background: var(--bg); }
  .problem .num {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.14em;
    color: var(--accent);
    display: block;
    margin-bottom: 20px;
  }
  .problem h3 {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0 0 14px;
    color: var(--ink);
    line-height: 1.3;
  }
  .problem p {
    font-size: 15px;
    line-height: 1.65;
    color: var(--ink-3);
    margin: 0;
    letter-spacing: -0.005em;
  }

  .problem-bridge {
    background: var(--ink);
    color: var(--bg);
    text-decoration: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    transition: background 0.15s;
  }
  .problem-bridge:hover { background: var(--accent-2); }
  .problem-bridge .num { color: #A0B3FF; }
  .problem-bridge h3 { color: var(--bg); }
  .problem-bridge p {
    color: color-mix(in srgb, var(--bg) 60%, transparent);
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
  }
  .problem-bridge .arrow {
    font-size: 18px;
    line-height: 1;
    color: var(--bg);
    opacity: 0.8;
  }

  .problems-summary {
    margin-top: 48px;
    padding: 28px 32px;
    border-left: 2px solid var(--accent);
    background: var(--bg-card);
    border-radius: 4px;
    font-size: 15px;
    line-height: 1.6;
    color: var(--ink-2);
    max-width: 880px;
    letter-spacing: -0.005em;
  }
  .problems-summary b { color: var(--ink); font-weight: 600; }

  @media (max-width: 860px) {
    .problem-list { grid-template-columns: 1fr; }
  }
  @media (min-width: 861px) and (max-width: 1100px) {
    .problem-list { grid-template-columns: repeat(2, 1fr); }
  }

  /* ─── DASHBOARD MOCKUP ─────────── */
  section.product { background: var(--bg); }
  .product-wrap {
    max-width: 1400px;
    margin: 0 auto;
    padding: 120px 40px;
  }
  .product-head {
    max-width: 780px;
    margin: 0 0 56px;
  }
  .product-head .section-label { margin-bottom: 20px; }

  .mockup-frame {
    background: var(--bg-2);
    padding: 20px;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--line);
    position: relative;
  }
  .mockup-caption {
    display: flex; align-items: center; justify-content: space-between;
    padding: 4px 8px 14px;
  }
  .mockup-caption .cap-label {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--ink-4);
    text-transform: uppercase;
  }
  .mockup-caption .cap-title {
    font-size: 13px;
    color: var(--ink-3);
    letter-spacing: -0.005em;
  }

  /* ──── Chat dashboard ──── */
  .app {
    background: var(--dash-bg);
    border-radius: 12px;
    overflow: hidden;
    display: grid;
    grid-template-rows: 52px 1fr 32px;
    min-height: 640px;
    border: 1px solid var(--dash-border);
    font-family: var(--sans);
    font-size: 13px;
    color: var(--ink);
  }
  .app-titlebar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 18px;
    border-bottom: 1px solid var(--dash-border);
    background: var(--dash-bar);
  }
  .app-titlebar .brand {
    display: flex; align-items: center; gap: 8px;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: -0.02em;
  }
  .app-titlebar .brand::before {
    content: ""; width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent);
  }
  .app-titlebar .center {
    display: flex; align-items: center; gap: 8px;
    padding: 5px 12px;
    background: var(--ok-bg);
    color: var(--ok);
    font-size: 11px;
    font-weight: 500;
    border-radius: 999px;
  }
  .app-titlebar .center .pulse {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--ok);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 18%, transparent);
    animation: pulse 2s ease-in-out infinite;
  }
  @keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.25); opacity: 0.7; }
  }
  .app-titlebar .right {
    display: flex; align-items: center; gap: 12px;
    font-size: 12px;
    color: var(--ink-3);
  }
  .app-titlebar .avatar {
    width: 26px; height: 26px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--bg);
    font-size: 10px;
    font-weight: 600;
    display: grid; place-items: center;
    letter-spacing: 0.02em;
  }

  .app-body {
    display: grid;
    grid-template-columns: 236px 1fr;
    overflow: hidden;
  }
  .app-side {
    background: var(--dash-side);
    border-right: 1px solid var(--dash-border);
    padding: 14px 10px;
    display: flex; flex-direction: column; gap: 2px;
    overflow-y: auto;
  }
  .side-new {
    display: flex; align-items: center; gap: 8px;
    padding: 9px 12px;
    background: var(--ink);
    color: var(--bg);
    border-radius: 8px;
    font-size: 12.5px;
    font-weight: 500;
    margin-bottom: 14px;
    cursor: pointer;
  }
  .side-new svg { width: 11px; height: 11px; }
  .side-group {
    font-family: var(--mono);
    font-size: 9.5px;
    letter-spacing: 0.16em;
    color: var(--ink-4);
    text-transform: uppercase;
    padding: 12px 12px 6px;
  }
  .side-item {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 12px;
    border-radius: 7px;
    color: var(--ink-2);
    font-size: 12.5px;
    cursor: pointer;
    letter-spacing: -0.005em;
    line-height: 1.4;
  }
  .side-item:hover { background: color-mix(in srgb, var(--ink) 4%, transparent); }
  .side-item.active {
    background: var(--accent-bg);
    color: var(--accent-2);
    font-weight: 500;
  }
  .side-item .bullet { color: var(--ink-4); width: 10px; flex-shrink: 0; font-size: 8px; }
  .side-item.active .bullet { color: var(--accent); }
  .side-item .t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .side-divider { height: 1px; background: var(--dash-border); margin: 10px 4px; }
  .side-foot-item {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 12px;
    font-size: 12.5px;
    color: var(--ink-2);
    border-radius: 7px;
    cursor: pointer;
  }
  .side-foot-item:hover { background: color-mix(in srgb, var(--ink) 4%, transparent); }
  .side-foot-item svg { width: 13px; height: 13px; opacity: 0.5; }
  .admin-badge {
    font-size: 9px;
    padding: 2px 6px;
    background: color-mix(in srgb, var(--ink) 8%, transparent);
    color: var(--ink-2);
    border-radius: 3px;
    margin-left: auto;
    letter-spacing: 0.04em;
    font-weight: 500;
    font-family: var(--mono);
  }

  .app-main {
    display: grid;
    grid-template-rows: 1fr auto;
    overflow: hidden;
  }
  .chat-scroll {
    overflow-y: auto;
    padding: 32px 40px 20px;
  }
  .msg { margin-bottom: 28px; }
  .msg-role {
    display: flex; align-items: center; gap: 10px;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--ink-4);
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  .msg-role .glyph {
    width: 22px; height: 22px;
    border-radius: 5px;
    display: grid; place-items: center;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0;
    font-family: var(--sans);
  }
  .msg-role .glyph.user { background: var(--ink); color: var(--bg); }
  .msg-role .glyph.ai { background: var(--accent); color: #fff; }
  .msg-role .timestamp { margin-left: auto; color: var(--ink-4); letter-spacing: 0.06em; }
  .msg-body {
    font-size: 14px;
    line-height: 1.68;
    color: var(--ink);
    letter-spacing: -0.005em;
  }
  .msg-body.user { color: var(--ink-2); }
  .msg-body .cite {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 18px; height: 18px;
    padding: 0 5px;
    background: var(--accent-bg);
    color: var(--accent);
    font-size: 10px;
    font-family: var(--mono);
    font-weight: 600;
    border-radius: 3px;
    vertical-align: super;
    margin: 0 1px;
    line-height: 1.7;
    cursor: pointer;
  }
  .msg-body ol { padding-left: 20px; margin: 10px 0; }
  .msg-body ol li { margin: 6px 0; line-height: 1.65; }
  .msg-body .hl { color: var(--ink); font-weight: 500; }

  .sources {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px dashed var(--dash-border);
  }
  .sources-label {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--ink-4);
    text-transform: uppercase;
    margin-bottom: 10px;
    display: flex; align-items: center; gap: 8px;
  }
  .source-card {
    display: grid;
    grid-template-columns: 22px 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: var(--dash-card);
    border: 1px solid var(--dash-border);
    border-radius: 8px;
    margin-bottom: 6px;
    transition: border-color 0.15s;
  }
  .source-card:hover { border-color: var(--ink-4); }
  .source-card .cite-sq {
    display: grid; place-items: center;
    width: 22px; height: 22px;
    background: var(--accent-bg);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 600;
    border-radius: 4px;
  }
  .source-card .meta .fn {
    font-size: 13px;
    font-weight: 500;
    color: var(--ink);
    letter-spacing: -0.01em;
    margin-bottom: 2px;
  }
  .source-card .meta .sub {
    font-size: 11px;
    color: var(--ink-3);
    letter-spacing: -0.005em;
  }
  .source-card .meta .sub .dot { margin: 0 6px; opacity: 0.4; }
  .source-card .ext {
    font-family: var(--mono);
    font-size: 9px;
    padding: 3px 7px;
    border-radius: 3px;
    letter-spacing: 0.06em;
    font-weight: 500;
    background: color-mix(in srgb, var(--ink) 6%, transparent);
    color: var(--ink-2);
  }

  .chat-input {
    border-top: 1px solid var(--dash-border);
    padding: 14px 40px 18px;
    background: var(--dash-bar);
  }
  .chat-input-box {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--dash-border);
    border-radius: 10px;
  }
  .chat-input-box input {
    flex: 1;
    border: none; outline: none;
    background: transparent;
    font-size: 13px;
    color: var(--ink);
    font-family: var(--sans);
    letter-spacing: -0.005em;
  }
  .chat-input-box input::placeholder { color: var(--ink-4); }
  .chat-input-box .ctrl {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--ink-4);
    padding: 2px 5px;
    background: color-mix(in srgb, var(--ink) 5%, transparent);
    border-radius: 3px;
  }
  .send-btn {
    width: 28px; height: 28px;
    border-radius: 7px;
    background: var(--ink);
    color: var(--bg);
    display: grid; place-items: center;
    cursor: pointer;
  }
  .send-btn svg { width: 12px; height: 12px; }

  .app-statusbar {
    background: var(--dash-bar);
    border-top: 1px solid var(--dash-border);
    display: flex; align-items: center; gap: 20px;
    padding: 0 18px;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.08em;
    color: var(--ink-4);
    text-transform: uppercase;
  }
  .app-statusbar .item { display: flex; align-items: center; gap: 6px; }
  .app-statusbar .item .tick { color: var(--ok); }
  .app-statusbar .spacer { flex: 1; }

  .mockup-notes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 48px;
  }
  .note {
    font-size: 14px;
    line-height: 1.6;
    color: var(--ink-3);
    letter-spacing: -0.005em;
  }
  .note h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 8px;
    letter-spacing: -0.015em;
  }
  .note b { color: var(--ink-2); font-weight: 600; }

  @media (max-width: 960px) {
    .app-body { grid-template-columns: 1fr; }
    .app-side { display: none; }
    .chat-scroll, .chat-input { padding-left: 20px; padding-right: 20px; }
    .mockup-notes { grid-template-columns: 1fr; gap: 24px; }
    .product-wrap { padding: 72px 22px; }
    .app-titlebar .center { display: none; }
  }

  /* ─── KNOWLEDGE CYCLE ─────────── */
  section.cycle { background: var(--bg-2); border-top: 1px solid var(--line); }
  .cycle-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .cycle-step {
    position: relative;
    padding: 28px 26px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 12px;
  }
  .cycle-step .step-tag {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.12em;
    color: var(--ink-3);
    text-transform: uppercase;
    margin-bottom: 16px;
  }
  .cycle-step .step-tag .n {
    display: grid; place-items: center;
    width: 20px; height: 20px;
    background: var(--ink);
    color: var(--bg);
    font-size: 10px;
    border-radius: 5px;
    font-family: var(--sans);
    font-weight: 600;
  }
  .cycle-step h4 {
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -0.015em;
    margin: 0 0 10px;
    line-height: 1.35;
    color: var(--ink);
  }
  .cycle-step > p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--ink-3);
    margin: 0 0 20px;
    letter-spacing: -0.005em;
  }

  .mini-ui {
    background: var(--dash-card);
    border: 1px solid var(--dash-border);
    border-radius: 10px;
    padding: 12px;
    font-size: 12px;
  }
  .mini-ui .mini-head {
    display: flex; align-items: center; gap: 8px;
    font-family: var(--mono);
    font-size: 9.5px;
    letter-spacing: 0.12em;
    color: var(--ink-4);
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  .mini-ui .mini-head .orb {
    width: 6px; height: 6px; border-radius: 50%;
  }
  .mini-ui .mini-q {
    font-size: 12px;
    line-height: 1.5;
    color: var(--ink);
    padding: 9px 11px;
    background: var(--bg-2);
    border-radius: 6px;
    margin-bottom: 8px;
    font-weight: 500;
    letter-spacing: -0.005em;
  }
  .mini-ui .alert {
    display: flex; gap: 8px;
    padding: 10px;
    background: var(--warn-bg);
    border: 1px solid color-mix(in srgb, var(--warn) 14%, transparent);
    border-radius: 6px;
    font-size: 11.5px;
    line-height: 1.5;
    color: var(--warn);
    letter-spacing: -0.005em;
  }
  .mini-ui .alert .icon {
    width: 14px; height: 14px; flex-shrink: 0;
    color: var(--warn);
  }
  .mini-ui .btn-row {
    display: flex; gap: 6px; margin-top: 8px;
  }
  .mini-ui .btn-sm {
    font-size: 10.5px;
    padding: 6px 10px;
    border-radius: 5px;
    font-weight: 500;
    letter-spacing: -0.005em;
  }
  .btn-sm.primary { background: var(--ink); color: var(--bg); }
  .btn-sm.ghost { border: 1px solid var(--line); color: var(--ink-3); background: var(--bg-card); }

  .mini-ui .expert {
    display: flex; gap: 10px;
    padding: 10px;
    background: var(--bg-card);
    border: 1px solid var(--dash-border);
    border-radius: 6px;
    margin-bottom: 8px;
    align-items: center;
  }
  .mini-ui .expert .av {
    width: 26px; height: 26px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--bg);
    font-size: 10px;
    font-weight: 600;
    display: grid; place-items: center;
    letter-spacing: 0.02em;
  }
  .mini-ui .expert .info { flex: 1; }
  .mini-ui .expert .info .name { font-size: 11.5px; font-weight: 600; color: var(--ink); letter-spacing: -0.005em; }
  .mini-ui .expert .info .role { font-size: 10px; color: var(--ink-3); letter-spacing: -0.005em; }
  .mini-ui .expert .status {
    font-size: 9.5px; color: var(--accent);
    font-family: var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
    font-weight: 500;
  }
  .mini-ui .answer-draft {
    font-size: 11.5px;
    line-height: 1.55;
    color: var(--ink-2);
    padding: 9px 11px;
    border-left: 2px solid var(--accent);
    background: var(--accent-bg);
    border-radius: 0 4px 4px 0;
    letter-spacing: -0.005em;
  }
  .mini-ui .kb-entry {
    padding: 10px;
    background: var(--ok-bg);
    border: 1px solid color-mix(in srgb, var(--ok) 15%, transparent);
    border-radius: 6px;
  }
  .mini-ui .kb-entry .kb-head {
    display: flex; align-items: center; gap: 6px;
    font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.1em;
    color: var(--ok); text-transform: uppercase; margin-bottom: 6px;
    font-weight: 500;
  }
  .mini-ui .kb-entry .kb-q { font-size: 11.5px; font-weight: 600; color: var(--ink); margin-bottom: 4px; line-height: 1.45; letter-spacing: -0.005em; }
  .mini-ui .kb-entry .kb-meta { font-size: 10px; color: var(--ink-3); letter-spacing: -0.005em; }
  .mini-ui .kb-entry .kb-meta .re { color: var(--ok); font-weight: 500; }

  .cycle-arrow {
    position: absolute;
    right: -22px;
    top: 46%;
    width: 20px;
    color: var(--ink-4);
    z-index: 2;
    background: var(--bg-2);
    padding: 6px 2px;
  }
  .cycle-arrow svg { width: 100%; display: block; }

  @media (max-width: 960px) {
    .cycle-grid { grid-template-columns: 1fr; gap: 16px; }
    .cycle-arrow { display: none; }
  }

  /* ─── ADMIN DASHBOARD (light) ─────── */
  section.admin { background: var(--bg); border-top: 1px solid var(--line); }
  .admin-mockup {
    background: var(--bg-card);
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    font-size: 13px;
  }
  .admin-mockup .am-titlebar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--line-2);
  }
  .am-titlebar .tabs {
    display: flex; gap: 2px;
    font-size: 12px;
    letter-spacing: -0.005em;
  }
  .am-titlebar .tabs .tab {
    padding: 6px 13px;
    color: var(--ink-3);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
  }
  .am-titlebar .tabs .tab.active {
    background: var(--ink);
    color: var(--bg);
  }
  .am-titlebar .period {
    font-family: var(--mono);
    font-size: 10.5px;
    color: var(--ink-3);
    letter-spacing: 0.06em;
  }

  .am-body {
    padding: 24px 22px;
    display: grid;
    gap: 20px;
  }
  .am-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }
  .stat-card {
    background: var(--bg);
    border: 1px solid var(--line-2);
    border-radius: 10px;
    padding: 18px 20px;
  }
  .stat-card .sc-label {
    font-size: 12px;
    color: var(--ink-3);
    margin-bottom: 10px;
    letter-spacing: -0.005em;
  }
  .stat-card .sc-value {
    font-size: 30px;
    font-weight: 600;
    letter-spacing: -0.028em;
    line-height: 1;
    color: var(--ink);
    font-variant-numeric: tabular-nums;
  }
  .stat-card .sc-value .unit {
    font-size: 16px;
    font-weight: 400;
    color: var(--ink-3);
    margin-left: 2px;
  }
  .stat-card .sc-trend {
    font-family: var(--mono);
    font-size: 10px;
    margin-top: 10px;
    letter-spacing: 0.04em;
  }
  .sc-trend.up { color: var(--ok); }
  .sc-trend.down { color: var(--warn); }

  .stat-card .sc-sub {
    font-size: 11.5px;
    color: var(--ink-3);
    margin-top: 10px;
    letter-spacing: -0.005em;
    line-height: 1.4;
  }
  .sc-sub--ok { color: var(--ok); }
  .stat-card--action {
    background: var(--accent-bg);
    border-color: var(--accent-line);
  }
  .stat-card--action .sc-value { color: var(--accent-2); }
  .stat-card--action .sc-label { color: var(--ink); font-weight: 500; }
  .sc-pill {
    display: inline-block;
    font-family: var(--mono);
    font-size: 8.5px;
    padding: 2px 5px;
    margin-left: 6px;
    border-radius: 3px;
    background: var(--accent);
    color: #fff;
    letter-spacing: 0.08em;
    font-weight: 500;
    vertical-align: middle;
  }

  .am-split {
    display: grid;
    grid-template-columns: 1.35fr 1fr;
    gap: 14px;
  }
  .panel {
    background: var(--bg);
    border: 1px solid var(--line-2);
    border-radius: 10px;
    overflow: hidden;
  }
  .panel-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--line-2);
  }
  .panel-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.005em;
  }
  .panel-sub {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.08em;
    color: var(--ink-3);
    text-transform: uppercase;
  }
  .panel-foot {
    padding: 10px 18px;
    border-top: 1px solid var(--line-2);
    font-size: 11.5px;
    color: var(--ink-3);
    letter-spacing: -0.005em;
  }
  .panel-foot .mono {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--ink-4);
  }

  /* Permission matrix table */
  .perm-table {
    font-size: 12.5px;
  }
  .perm-row {
    display: grid;
    grid-template-columns: 1.4fr 1fr 0.9fr 50px 0.8fr;
    gap: 10px;
    padding: 10px 18px;
    align-items: center;
    border-bottom: 1px solid var(--line-2);
    letter-spacing: -0.005em;
  }
  .perm-row:last-child { border-bottom: none; }
  .perm-row.perm-head {
    background: var(--bg-2);
    font-family: var(--mono);
    font-size: 9.5px;
    letter-spacing: 0.12em;
    color: var(--ink-3);
    text-transform: uppercase;
    font-weight: 500;
    padding: 10px 18px;
  }
  .perm-row--ext { background: color-mix(in srgb, var(--bg-3) 40%, transparent); }
  .pu {
    display: flex; align-items: center; gap: 9px;
    color: var(--ink);
    font-weight: 500;
  }
  .pu-av {
    width: 24px; height: 24px;
    border-radius: 5px;
    background: var(--accent);
    color: #fff;
    font-family: var(--sans);
    font-size: 9.5px;
    font-weight: 600;
    display: grid; place-items: center;
    letter-spacing: 0;
  }
  .pu-av-dark { background: var(--ink); }
  .pu-av-ext { background: var(--ink-4); }
  .pu-num {
    font-family: var(--mono);
    font-weight: 600;
    color: var(--ink-2);
  }
  .pu-time {
    color: var(--ink-3);
    font-size: 11.5px;
  }
  .role {
    display: inline-block;
    padding: 3px 8px;
    font-size: 10.5px;
    border-radius: 4px;
    font-weight: 500;
    letter-spacing: -0.005em;
  }
  .role-admin { background: var(--ink); color: var(--bg); }
  .role-editor { background: var(--accent-bg); color: var(--accent); }
  .role-viewer { background: color-mix(in srgb, var(--ink) 6%, transparent); color: var(--ink-2); }
  .role-ext { background: var(--warn-bg); color: var(--warn); }

  /* Verification queue panel */
  .panel-queue { display: flex; flex-direction: column; }
  .queue-section { border-bottom: 1px solid var(--line-2); }
  .queue-section:last-child { border-bottom: none; }
  .queue-section-head {
    padding: 12px 18px 8px;
  }
  .qs-label {
    display: flex; align-items: center; gap: 8px;
    font-family: var(--mono);
    font-size: 9.5px;
    letter-spacing: 0.12em;
    color: var(--ink-3);
    text-transform: uppercase;
    font-weight: 500;
  }
  .qs-dot {
    width: 7px; height: 7px; border-radius: 50%;
  }
  .queue-item {
    padding: 10px 18px;
    border-top: 1px solid var(--line-3);
  }
  .qi-q {
    font-size: 12.5px;
    font-weight: 500;
    color: var(--ink);
    line-height: 1.45;
    letter-spacing: -0.005em;
    margin-bottom: 4px;
  }
  .qi-meta {
    font-size: 11px;
    color: var(--ink-3);
    letter-spacing: -0.005em;
  }
  .qi-approver {
    font-family: var(--mono);
    font-size: 10px;
    padding: 2px 5px;
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    color: var(--accent);
    border-radius: 3px;
    font-weight: 500;
    margin-left: 4px;
    letter-spacing: 0.02em;
  }
  .qi-meta--warn { color: var(--warn); }
  .queue-item--pending {
    background: color-mix(in srgb, var(--warn-bg) 40%, transparent);
  }

  @media (max-width: 1100px) {
    .am-stats { grid-template-columns: repeat(2, 1fr); }
    .am-split { grid-template-columns: 1fr; }
    .perm-row {
      grid-template-columns: 1.4fr 1fr 0.8fr;
    }
    .perm-row > :nth-child(4), .perm-row > :nth-child(5),
    .perm-row.perm-head > :nth-child(4), .perm-row.perm-head > :nth-child(5) {
      display: none;
    }
  }

  /* ─── ROLLOUT 3-STAGE ─────────── */
  section.rollout { background: var(--bg); }
  .stage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .stage {
    padding: 36px 32px 32px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 14px;
  }
  .stage-header {
    display: flex; justify-content: space-between; align-items: baseline;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line-2);
  }
  .stage-n {
    font-size: 48px;
    font-weight: 300;
    color: var(--ink);
    line-height: 1;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
  }
  .stage-label {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--ink-3);
    text-transform: uppercase;
    text-align: right;
    line-height: 1.5;
  }
  .stage h3 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.018em;
    margin: 0 0 10px;
    color: var(--ink);
  }
  .stage > p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--ink-3);
    margin: 0 0 24px;
    letter-spacing: -0.005em;
    min-height: 48px;
  }
  .stage-specs {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 8px 16px;
    font-size: 13px;
    padding-top: 18px;
    border-top: 1px dashed var(--line);
  }
  .stage-specs dt {
    font-size: 12px;
    color: var(--ink-4);
    letter-spacing: -0.005em;
    line-height: 1.6;
  }
  .stage-specs dd {
    margin: 0;
    color: var(--ink);
    line-height: 1.5;
    letter-spacing: -0.005em;
    font-weight: 500;
  }

  @media (max-width: 960px) {
    .stage-grid { grid-template-columns: 1fr; }
  }

  /* ─── PRICING CARDS ─────────────── */
  section.pricing { background: var(--bg); border-top: 1px solid var(--line); }
  section.pricing.pricing-page { border-top: none; }
  .pricing-page-intro { max-width: 720px; margin-top: 16px; }
  .pricing-page-intro p {
    font-size: 14px;
    color: var(--ink-3);
    line-height: 1.7;
    margin: 0;
  }
  .pricing-page-intro p + p { margin-top: 12px; }

  /* ─── CONTACT PAGE ─────────── */
  section.contact { background: var(--bg); }
  .contact-cta-row { margin-top: 32px; }
  .contact-cta-big {
    font-size: 17px;
    padding: 16px 28px;
    font-family: var(--mono);
    letter-spacing: -0.01em;
  }
  .price-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: stretch;
  }
  .price-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 40px 32px 32px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 16px;
    transition: transform .2s, box-shadow .2s, border-color .2s;
  }
  .price-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(11,11,12,0.06);
  }
  .price-card.popular {
    border-color: var(--accent);
    border-width: 2px;
    box-shadow: 0 12px 32px rgba(30,42,94,0.08);
  }
  .price-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 5px 14px;
    background: var(--accent);
    color: white;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: 999px;
    white-space: nowrap;
  }
  .price-tier-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.01em;
    margin-bottom: 4px;
  }
  .price-tier-tagline {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink-3);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 24px;
  }
  .price-amount-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 6px;
    flex-wrap: wrap;
  }
  .price-amount {
    font-size: 38px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--ink);
    line-height: 1;
  }
  .price-period {
    font-size: 14px;
    color: var(--ink-3);
    font-weight: 500;
  }
  .price-original {
    font-size: 14px;
    color: var(--ink-4);
    text-decoration: line-through;
  }
  .price-yearly {
    font-size: 12px;
    color: var(--ink-3);
    margin-bottom: 10px;
  }
  .price-discount {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--ok);
    background: var(--ok-bg);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 28px;
  }
  .price-discount.placeholder { visibility: hidden; }
  .price-features {
    list-style: none;
    padding: 0;
    margin: 0 0 32px;
    flex: 1;
  }
  .price-features li {
    position: relative;
    padding: 10px 0 10px 24px;
    font-size: 13px;
    color: var(--ink-2);
    line-height: 1.5;
    border-bottom: 1px dashed var(--line-2);
  }
  .price-features li:last-child { border-bottom: none; }
  .price-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 10px;
    font-weight: 600;
    color: var(--ok);
    font-size: 13px;
  }
  .price-cta {
    display: block;
    width: 100%;
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: background .2s, transform .15s, border-color .2s;
    font-family: inherit;
    letter-spacing: -0.005em;
  }
  .price-cta.primary {
    background: var(--accent);
    color: white;
  }
  .price-cta.primary:hover { background: var(--accent-2); transform: translateY(-1px); }
  .price-cta.secondary {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line);
  }
  .price-cta.secondary:hover { background: var(--bg-2); border-color: var(--ink-3); }
  .enterprise-notice {
    margin-top: 56px;
    padding: 28px 32px;
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.7;
    color: var(--ink-2);
  }
  .enterprise-notice strong { color: var(--ink); font-weight: 600; }
  .enterprise-notice a {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid currentColor;
    margin-left: 4px;
  }

  @media (max-width: 960px) {
    .price-grid { grid-template-columns: 1fr; gap: 32px; }
  }

  /* ─── FAQ ───────────────────────── */
  section.faq { background: var(--bg); border-top: 1px solid var(--line); }
  .faq-list {
    display: grid;
    gap: 12px;
    max-width: 820px;
    margin: 0 auto;
  }
  .faq-item {
    background: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color .15s;
  }
  .faq-item[open] { border-color: var(--ink-3); }
  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    cursor: pointer;
    list-style: none;
    letter-spacing: -0.01em;
    line-height: 1.5;
    gap: 16px;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::after {
    content: '+';
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 50%;
    color: var(--ink-3);
    font-size: 16px;
    font-weight: 400;
    transition: transform .2s, border-color .2s, color .2s;
  }
  .faq-item[open] summary::after {
    content: '−';
    transform: rotate(0deg);
    border-color: var(--ink);
    color: var(--ink);
  }
  .faq-item summary:hover { background: var(--bg-2); }
  .faq-body {
    padding: 0 24px 22px;
    font-size: 14px;
    line-height: 1.7;
    color: var(--ink-2);
    letter-spacing: -0.005em;
  }
  .faq-body p { margin: 0 0 12px; }
  .faq-body p:last-child { margin-bottom: 0; }
  .faq-body b { color: var(--ink); font-weight: 600; }
  .faq-body a { color: var(--accent); }

  /* ─── BUY MODAL ─────────────────── */
  .modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(11, 11, 12, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: backdropIn .2s ease-out;
  }
  .modal-backdrop[hidden] { display: none; }
  @keyframes backdropIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }
  .modal-content {
    position: relative;
    background: var(--bg-card);
    border-radius: 16px;
    padding: 44px 40px 36px;
    max-width: 540px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 24px 64px rgba(0,0,0,0.2);
    animation: modalIn .25s ease-out;
  }
  @keyframes modalIn {
    from { opacity: 0; transform: translateY(12px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
  }
  .modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    font-size: 22px;
    line-height: 1;
    color: var(--ink-3);
    cursor: pointer;
    border-radius: 6px;
    transition: background .15s, color .15s;
  }
  .modal-close:hover { background: var(--bg-2); color: var(--ink); }
  .modal-title {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 6px;
    color: var(--ink);
  }
  .modal-price {
    font-size: 14px;
    color: var(--ink-3);
    margin-bottom: 28px;
    font-weight: 500;
  }
  .modal-section {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line-2);
  }
  .modal-section:last-of-type { border-bottom: none; padding-bottom: 0; }
  .modal-section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 10px;
    letter-spacing: -0.005em;
  }
  .modal-section-text {
    font-size: 13px;
    color: var(--ink-3);
    line-height: 1.6;
    margin: 0;
  }
  .modal-steps {
    margin: 0;
    padding-left: 22px;
    font-size: 13px;
    line-height: 1.7;
    color: var(--ink-2);
  }
  .modal-steps li { margin-bottom: 8px; }
  .modal-steps li:last-child { margin-bottom: 0; }
  .modal-steps b { color: var(--ink); font-weight: 600; }
  .modal-cta-row {
    display: flex;
    gap: 10px;
    margin-top: 28px;
  }
  .modal-cta-row .btn-primary,
  .modal-cta-row .btn-ghost {
    flex: 1;
    justify-content: center;
  }
  .bank-info {
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .bank-row {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 12px;
    font-size: 13px;
    align-items: baseline;
  }
  .bank-k {
    color: var(--ink-3);
    letter-spacing: -0.005em;
  }
  .bank-v {
    color: var(--ink);
    font-weight: 500;
    letter-spacing: -0.005em;
  }
  .bank-v.bank-account {
    font-family: var(--mono);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
    user-select: all;
  }
  .bank-v.bank-amount {
    font-weight: 600;
    color: var(--accent);
  }
  .bank-meta {
    font-weight: 400;
    color: var(--ink-3);
    font-size: 12px;
  }
  .bank-row:has(.bank-copy) {
    grid-template-columns: 70px 1fr auto;
  }
  .bank-copy {
    border: 1px solid var(--line);
    background: var(--bg-card);
    color: var(--ink-2);
    font-size: 11px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
    font-family: inherit;
  }
  .bank-copy:hover { background: var(--ink); color: white; border-color: var(--ink); }
  .bank-copy.copied { background: var(--ok); color: white; border-color: var(--ok); }

  /* 결제 주기 탭 */
  .period-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .period-tab {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1.5px solid var(--line);
    border-radius: 10px;
    cursor: pointer;
    transition: border-color .15s, background .15s;
    font-family: inherit;
    text-align: left;
  }
  .period-tab:hover { border-color: var(--ink-3); }
  .period-tab.active {
    border-color: var(--accent);
    background: var(--accent-bg);
  }
  .period-tab-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.005em;
  }
  .period-tab-amount {
    font-size: 16px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -0.02em;
  }
  .period-tab.active .period-tab-amount { color: var(--accent); }
  .period-tab-note {
    font-size: 11px;
    color: var(--ink-3);
  }

  /* Callout 박스 */
  .modal-section.trial-callout {
    background: var(--ok-bg);
    border: 1px solid rgba(21,128,61,0.18);
    border-radius: 10px;
    padding: 14px 16px;
    font-size: 13px;
    color: var(--ink-2);
    line-height: 1.6;
    border-bottom: 1px solid rgba(21,128,61,0.18);
    margin-bottom: 24px;
  }
  .modal-section.trial-callout strong {
    display: block;
    color: var(--ok);
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 13px;
  }
  .modal-section.guarantee {
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 14px 16px;
    font-size: 12px;
    color: var(--ink-3);
    line-height: 1.6;
    border-bottom: none;
    padding-bottom: 14px;
  }
  .modal-section.guarantee strong {
    display: block;
    color: var(--ink);
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 12px;
  }
  .modal-section.guarantee b { color: var(--ink-2); font-weight: 500; }

  /* ─── DIFFERENTIATION TABLE ─────── */
  section.diff { background: var(--bg-2); border-top: 1px solid var(--line); }
  .compare-wrap {
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-card);
  }
  .compare {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
  }
  .compare thead th {
    font-size: 12px;
    letter-spacing: -0.005em;
    color: var(--ink-3);
    font-weight: 500;
    text-align: left;
    padding: 18px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    vertical-align: top;
    line-height: 1.4;
  }
  .compare thead th.us {
    color: var(--accent);
    font-weight: 600;
    background: var(--accent-bg);
  }
  .compare tbody tr { border-bottom: 1px solid var(--line-2); }
  .compare tbody tr:last-child { border-bottom: none; }
  .compare td {
    padding: 16px 20px;
    vertical-align: top;
    line-height: 1.5;
    color: var(--ink-2);
    letter-spacing: -0.005em;
  }
  .compare td:first-child {
    font-weight: 500;
    color: var(--ink);
    width: 20%;
  }
  .compare td.us {
    background: var(--accent-bg);
    color: var(--ink);
    font-weight: 500;
    width: 26%;
  }
  .mark {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 13px;
  }
  .mark::before {
    content: ""; width: 6px; height: 6px; border-radius: 50%;
  }
  .mark-ok::before { background: var(--ok); }
  .mark-no::before { background: var(--warn); }
  .mark-mid::before { background: var(--ink-4); }
  .mark-ok { color: var(--ok); }
  .mark-no { color: var(--warn); }

  @media (max-width: 860px) {
    .compare, .compare tbody, .compare thead, .compare tr, .compare td, .compare th { display: block; }
    .compare thead { display: none; }
    .compare tr { padding: 14px 18px; border-bottom: 1px solid var(--line); }
    .compare td { padding: 6px 0; border: none; }
    .compare td:first-child {
      font-family: var(--mono);
      font-size: 10px;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--ink-3);
      margin-bottom: 6px;
    }
    .compare td.us {
      background: transparent;
      padding-bottom: 10px;
      border-top: 1px solid var(--accent-line);
      padding-top: 10px;
    }
  }

  /* ─── LLM STACK ─────────── */
  section.stack { background: var(--bg); }
  .stack-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .llm-card {
    padding: 32px 28px 28px;
    border: 1px solid var(--line);
    background: var(--bg-card);
    border-radius: 14px;
    transition: border-color 0.15s, transform 0.2s;
  }
  .llm-card:hover { border-color: var(--ink-4); transform: translateY(-2px); }
  .llm-card .model-org {
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.1em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 10px;
    font-weight: 500;
  }
  .llm-card .model-name {
    font-weight: 700;
    font-size: 24px;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 24px;
  }
  .llm-card .spec-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-top: 1px solid var(--line-2);
    font-size: 13px;
    letter-spacing: -0.005em;
  }
  .llm-card .spec-row:first-of-type { border-top: none; padding-top: 0; }
  .llm-card .spec-row .k { color: var(--ink-3); }
  .llm-card .spec-row .v {
    color: var(--ink);
    font-weight: 500;
    font-family: var(--mono);
    font-size: 12px;
  }
  .llm-card .note {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px dashed var(--line);
    font-size: 13px;
    line-height: 1.55;
    color: var(--ink-3);
    letter-spacing: -0.005em;
  }

  @media (max-width: 860px) {
    .stack-grid { grid-template-columns: 1fr; }
  }

  /* ─── FINAL CTA ─────────── */
  section.final { background: var(--bg-2); border-top: 1px solid var(--line); }
  section.final .section-inner { padding: 168px 40px; text-align: center; }
  .final-title {
    font-size: clamp(40px, 5vw, 80px);
    line-height: 1.04;
    font-weight: 600;
    letter-spacing: -0.035em;
    margin: 0 0 28px;
    max-width: 880px;
    margin-inline: auto;
  }
  .final-sub {
    font-size: 19px;
    color: var(--ink-3);
    max-width: 620px;
    margin: 0 auto 44px;
    line-height: 1.6;
    letter-spacing: -0.005em;
  }
  .final-ctas { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

  /* ─── FOOTER ─────────── */
  footer {
    background: var(--ink);
    color: var(--bg);
    padding: 64px 40px 36px;
  }
  footer .inner {
    max-width: 1320px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 36px;
    border-bottom: 1px solid color-mix(in srgb, var(--bg) 14%, transparent);
  }
  @media (max-width: 1100px) {
    footer .inner { grid-template-columns: 2fr 1fr 1fr; }
    footer .brand-block { grid-column: span 3; }
  }
  footer .brand-block .logo {
    color: var(--bg);
    margin-bottom: 16px;
  }
  footer .brand-block .logo .label {
    color: color-mix(in srgb, var(--bg) 45%, transparent);
    border-left-color: color-mix(in srgb, var(--bg) 18%, transparent);
  }
  footer .brand-tagline-en {
    font-family: "Inter", var(--sans);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--accent-bright);
    margin: 14px 0 12px;
    line-height: 1.5;
  }
  footer .brand-block p {
    font-size: 13.5px;
    line-height: 1.65;
    color: color-mix(in srgb, var(--bg) 60%, transparent);
    max-width: 380px;
    margin: 0;
    letter-spacing: -0.005em;
  }
  footer .col h5 {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: color-mix(in srgb, var(--bg) 45%, transparent);
    text-transform: uppercase;
    margin: 0 0 16px;
    font-weight: 500;
  }
  footer .col ul { list-style: none; padding: 0; margin: 0; font-size: 13.5px; }
  footer .col ul li { margin-bottom: 10px; color: color-mix(in srgb, var(--bg) 70%, transparent); letter-spacing: -0.005em; }
  footer .col ul a { color: inherit; text-decoration: none; transition: color 0.15s; }
  footer .col ul a:hover { color: var(--bg); }
  footer .bottom {
    max-width: 1320px;
    margin: 0 auto;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.1em;
    color: color-mix(in srgb, var(--bg) 40%, transparent);
    text-transform: uppercase;
  }
  @media (max-width: 860px) {
    footer .inner { grid-template-columns: 1fr 1fr; gap: 32px; }
    footer .brand-block { grid-column: span 2; }
  }

  /* ─── SCROLL REVEAL ─────────── */
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s cubic-bezier(0.2, 0.6, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.6, 0.2, 1);
  }
  .reveal.in { opacity: 1; transform: translateY(0); }