:root {
    --ink: #191D24;
    --ink-soft: #565E6C;
    --bg: #EFF1EF;
    --surface: #FFFFFF;
    --pine: #1F5C4B;
    --pine-deep: #123D31;
    --ochre: #9C6817;
    --indigo: #303B6B;
    --line: #DCDEDA;
  }

  /* Reset */
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; }

  /* Layout helper */
  .wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
  .center { text-align: center; }

  /* Type helpers */
  .eyebrow {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12.5px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--pine);
    font-weight: 500;
    margin-bottom: 16px;
  }
  h1, h2, h3 { font-family: 'Fraunces', serif; font-weight: 500; color: var(--ink); }

  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 26px;
    border-radius: 5px;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 15px;
    text-decoration: none;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
  }
  .btn:active { transform: scale(0.98); }
  .btn:focus-visible { outline: 2px solid var(--pine); outline-offset: 3px; }
  .btn-primary { background: var(--pine); color: #fff; }
  .btn-primary:hover { background: var(--pine-deep); }
  .btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink-soft); }
  .btn-ghost:hover { border-color: var(--ink); background: rgba(25,29,36,0.04); }
  .btn-sm { padding: 9px 20px; font-size: 14px; }
  .btn-lg { padding: 17px 34px; font-size: 16px; }

  /* Nav */
  .nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(239,241,239,0.9);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
  }
  .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; position: relative; }
  .logo { display: flex; align-items: center; gap: 10px; font-family: 'Fraunces', serif; font-weight: 600; font-size: 19px; text-decoration: none; }
  .logo-tag {
    width: 16px; height: 16px; background: var(--pine);
    clip-path: polygon(4px 0%, 100% 0%, 100% 100%, 4px 100%, 0% 50%);
    display: inline-block;
  }
  .nav-links { display: flex; align-items: center; gap: 32px; }
  .nav-links a:not(.btn) { text-decoration: none; font-size: 15px; font-weight: 500; color: var(--ink-soft); }
  .nav-links a:not(.btn):hover { color: var(--ink); }
  .nav-toggle-input { display: none; }
  .nav-toggle-btn { display: none; width: 24px; height: 18px; position: relative; cursor: pointer; }
  .nav-toggle-btn span, .nav-toggle-btn span::before, .nav-toggle-btn span::after {
    content: ""; position: absolute; left: 0; right: 0; height: 2px; background: var(--ink); border-radius: 2px;
  }
  .nav-toggle-btn span { top: 8px; }
  .nav-toggle-btn span::before { top: -7px; }
  .nav-toggle-btn span::after { top: 7px; }

  /* Hero */
  .hero { padding: 96px 0 88px; }
  .hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
  .hero h1 { font-size: clamp(2.3rem, 4.2vw, 3.3rem); line-height: 1.14; letter-spacing: -0.01em; margin-bottom: 22px; }
  .hero-sub { font-size: 17px; color: var(--ink-soft); max-width: 460px; margin-bottom: 32px; }
  .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

  .hero-visual { position: relative; height: 300px; }
  .tag {
    position: absolute;
    display: flex; align-items: center;
    width: 190px; height: 62px;
    padding-left: 30px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px; letter-spacing: 0.1em; font-weight: 500;
    color: #fff;
    clip-path: polygon(24px 0%, 100% 0%, 100% 100%, 24px 100%, 0% 50%);
    box-shadow: 0 10px 24px rgba(25,29,36,0.14);
    transition: transform 0.2s ease;
  }
  .tag::before {
    content: ""; position: absolute; left: 11px; top: 50%; transform: translateY(-50%);
    width: 8px; height: 8px; border-radius: 50%; background: var(--bg);
  }
  .tag-brand { background: var(--pine); top: 8px; left: 24px; transform: rotate(-7deg); z-index: 3; }
  .tag-model { background: var(--ochre); top: 96px; left: 62px; transform: rotate(5deg); z-index: 2; }
  .tag-item { background: var(--indigo); top: 184px; left: 16px; transform: rotate(-4deg); z-index: 1; }
  .tag-brand:hover { transform: rotate(-7deg) translateY(-4px); }
  .tag-model:hover { transform: rotate(5deg) translateY(-4px); }
  .tag-item:hover { transform: rotate(-4deg) translateY(-4px); }

  /* Structure */
  .structure { padding: 88px 0; }
  .structure h2 { font-size: clamp(1.6rem, 2.8vw, 2rem); line-height: 1.32; max-width: 600px; margin: 0 auto 48px; }
  .structure-grid { display: flex; align-items: stretch; gap: 18px; }
  .s-card { flex: 1; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 28px 24px; }
  .s-tag { display: inline-block; width: 42px; height: 16px; margin-bottom: 16px; clip-path: polygon(5px 0%, 100% 0%, 100% 100%, 5px 100%, 0% 50%); }
  .s-tag--brand { background: var(--pine); }
  .s-tag--model { background: var(--ochre); }
  .s-tag--item { background: var(--indigo); }
  .s-card h3 { font-size: 20px; margin-bottom: 10px; }
  .s-card p { font-size: 15px; color: var(--ink-soft); }
  .s-arrow { display: flex; align-items: center; justify-content: center; font-size: 20px; color: #B7BAB3; padding: 0 2px; }

  /* Behavior */
  .behavior { padding: 0 0 96px; }
  .behavior h2 { font-size: clamp(1.6rem, 2.8vw, 2rem); max-width: 560px; margin: 0 auto 48px; }
  .behavior-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px 48px; }
  .b-item { padding-top: 20px; border-top: 1px solid var(--line); }
  .b-mark { display: inline-block; width: 30px; height: 12px; margin-bottom: 16px; clip-path: polygon(4px 0%, 100% 0%, 100% 100%, 4px 100%, 0% 50%); }
  .b-item h4 { font-family: 'Fraunces', serif; font-weight: 500; font-size: 17px; margin-bottom: 8px; color: var(--ink); }
  .b-item p { font-size: 15px; color: var(--ink-soft); }

  /* CTA */
  .cta { background: var(--pine); color: #fff; text-align: center; padding: 80px 24px; }
  .cta h2 { color: #fff; font-size: clamp(1.7rem, 3vw, 2.2rem); margin-bottom: 12px; }
  .cta p { color: rgba(255,255,255,0.78); margin-bottom: 28px; }
  .cta .btn-primary { background: #fff; color: var(--pine); }
  .cta .btn-primary:hover { background: var(--bg); }

  /* Footer */
  .footer { background: var(--ink); padding: 48px 24px 32px; }
  .footer-inner { display: flex; flex-direction: column; align-items: center; gap: 20px; text-align: center; }
  .footer .logo { color: #fff; }
  .footer-links { display: flex; gap: 24px; }
  .footer-links a { color: rgba(255,255,255,0.68); text-decoration: none; font-size: 14px; }
  .footer-links a:hover { color: #fff; }
  .fine-print { font-size: 13px; color: rgba(255,255,255,0.42); }

  /* Responsive */
  @media (max-width: 760px) {
    .nav-toggle-btn { display: block; }
    .nav-links {
      display: none;
      position: absolute; top: 72px; left: 0; right: 0;
      background: var(--surface);
      flex-direction: column; align-items: flex-start;
      padding: 20px 24px; gap: 18px;
      border-bottom: 1px solid var(--line);
    }
    .nav-toggle-input:checked ~ .nav-links { display: flex; }
    .hero { padding: 56px 0 64px; }
    .hero-inner { grid-template-columns: 1fr; gap: 56px; }
    .hero-visual { height: 260px; }
    .tag { width: 160px; }
    .structure-grid { flex-direction: column; }
    .s-arrow { transform: rotate(90deg); padding: 6px 0; }
    .behavior-grid { grid-template-columns: 1fr; gap: 32px; }
  }

  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
    html { scroll-behavior: auto; }
  }

.s-tag--pine { background: var(--pine); }