/* ---------- Variants: deep-plum ---------- */
:root {
  --bg: #140f1f;
  --bg-soft: #1c1530;
  --surface: #241b3c;
  --ink: #f2ecff;
  --ink-dim: #9d95bf;
  --line: rgba(242, 236, 255, 0.12);
  --line-strong: rgba(242, 236, 255, 0.26);
  --accent: #d4b8ff;
  --accent-ink: #140f1f;
  --pill: rgba(212, 184, 255, 0.12);
  --display-font: "Fraunces", "Times New Roman", serif;
  --display-weight: 300;
  --display-tracking: -0.035em;
  --display-ital: 1;
}

/* ---------- Base ---------- */
.bt-home * { box-sizing: border-box; margin: 0; padding: 0; }
.bt-home { background: var(--bg); color: var(--ink); font-family: "Inter", system-ui, sans-serif; font-size: 16px; line-height: 1.55; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden; }
.bt-home ::selection { background: var(--accent); color: var(--accent-ink); }
.bt-home a { color: inherit; text-decoration: none; }
.bt-home img, .bt-home svg { display: block; max-width: 100%; }

.bt-home .display {
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  line-height: 0.95;
}

/* ---------- Layout ---------- */
.bt-home .wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 36px; }
@media (max-width: 720px) { .bt-home .wrap { padding: 0 22px; } }
.bt-home section { position: relative; padding: 120px 0; }
@media (max-width: 720px) { .bt-home section { padding: 80px 0; } }
.bt-home .eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* ---------- Nav ---------- */
.bt-home .nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 22px 36px;
  display: flex; align-items: center; justify-content: space-between;
  backdrop-filter: blur(18px);
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--line);
}
.bt-home .nav-logo { display: flex; align-items: center; gap: 10px; }
.bt-home .nav-logo img { height: 36px; width: auto; filter: brightness(1.8); }
.bt-home .nav-links { display: flex; gap: 28px; font-family: "JetBrains Mono", monospace; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-dim); }
.bt-home .nav-links a { transition: color 0.2s; }
.bt-home .nav-links a:hover { color: var(--ink); }
@media (max-width: 720px) { .bt-home .nav-links { display: none; } }

/* ---------- Hero ---------- */
.bt-home .hero {
  padding: 180px 0 120px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.bt-home .hero-inner { position: relative; z-index: 2; }
.bt-home .hero h1.eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 400;
  line-height: 1.5;
}
.bt-home .hero h2.display {
  font-size: clamp(52px, 9vw, 128px);
  font-style: italic;
  font-variation-settings: "ital" var(--display-ital);
  max-width: 13ch;
  margin: 28px auto 30px;
}
.bt-home .hero h2 em {
  font-style: normal;
  color: var(--accent);
  font-variation-settings: "ital" 0;
}
.bt-home .hero-sub {
  max-width: 540px;
  margin: 0 auto 44px;
  color: var(--ink-dim);
  font-size: 17px;
  line-height: 1.6;
}
.bt-home .hero-cta { display: inline-flex; align-items: center; gap: 10px; }
.bt-home .hero-scribble { position: absolute; opacity: 0.55; }
.bt-home .hero-scribble.left { top: 22%; left: -40px; width: 180px; }
.bt-home .hero-scribble.right { top: 12%; right: -30px; width: 160px; }
@media (max-width: 900px) { .bt-home .hero-scribble { display: none; } }

/* ---------- Buttons ---------- */
.bt-home .btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 28px;
  border-radius: 100px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: transform 0.2s, background 0.2s, color 0.2s;
  border: none; cursor: pointer;
}
.bt-home .btn-primary { background: var(--accent); color: var(--accent-ink); }
.bt-home .btn-primary:hover { transform: translateY(-2px); }
.bt-home .btn-ghost { border: 1px solid var(--line-strong); color: var(--ink); background: transparent; }
.bt-home .btn-ghost:hover { background: var(--surface); }

/* ---------- Marquee ---------- */
.bt-home .marquee {
  padding: 36px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.bt-home .marquee-track {
  display: flex;
  gap: 64px;
  animation: bt-scroll 40s linear infinite;
  width: max-content;
}
.bt-home .marquee-item {
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  font-style: italic;
  font-variation-settings: "ital" var(--display-ital);
  font-size: 36px;
  color: var(--ink-dim);
  letter-spacing: -0.02em;
  white-space: nowrap;
  display: flex; align-items: center; gap: 64px;
}
.bt-home .marquee-item::after {
  content: "\2726";
  font-style: normal;
  color: var(--accent);
  font-size: 14px;
}
@keyframes bt-scroll { to { transform: translateX(-50%); } }

/* ---------- Section heading ---------- */
.bt-home .section-head { margin-bottom: 72px; }
.bt-home .section-head h2 {
  font-size: clamp(42px, 6.5vw, 88px);
  font-style: italic;
  font-variation-settings: "ital" var(--display-ital);
  max-width: 16ch;
  line-height: 0.98;
}
.bt-home .section-head h2 em { font-style: normal; color: var(--accent); font-variation-settings: "ital" 0; }
.bt-home .section-head .lead { max-width: 540px; color: var(--ink-dim); margin-top: 18px; font-size: 16px; line-height: 1.6; }

/* ---------- Services ---------- */
.bt-home .services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 56px 48px; }
@media (max-width: 880px) { .bt-home .services-grid { grid-template-columns: 1fr; gap: 48px; } }
.bt-home .service { text-align: left; }
.bt-home .service .illus { height: 140px; display: flex; align-items: center; justify-content: flex-start; margin-bottom: 24px; color: var(--ink); }
.bt-home .service h3 {
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  font-size: 28px;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: 12px;
}
.bt-home .service p { color: var(--ink-dim); font-size: 15px; line-height: 1.6; }
.bt-home .service .tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.bt-home .service .tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 100px;
}

/* ---------- Portfolio ---------- */
.bt-home .portfolio { background: var(--bg-soft); }
.bt-home .portfolio-list { display: flex; flex-direction: column; gap: 24px; }
.bt-home .project {
  display: grid;
  grid-template-columns: 0.9fr 1.2fr;
  gap: 48px;
  align-items: center;
  padding: 48px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 20px;
  transition: transform 0.4s cubic-bezier(0.2, 0.7, 0.2, 1), border-color 0.3s;
}
.bt-home .project:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.bt-home .project:nth-child(even) { grid-template-columns: 1.2fr 0.9fr; }
.bt-home .project:nth-child(even) .project-visual { order: 2; }
@media (max-width: 880px) {
  .bt-home .project, .bt-home .project:nth-child(even) { grid-template-columns: 1fr; gap: 28px; padding: 28px; }
  .bt-home .project .project-visual,
  .bt-home .project:nth-child(even) .project-visual { order: -1; }
}
.bt-home .project-meta { display: flex; gap: 14px; align-items: center; font-family: "JetBrains Mono", monospace; font-size: 11px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 20px; }
.bt-home .project-meta .num { color: var(--accent); }
.bt-home .project h3 {
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  font-size: clamp(32px, 4vw, 48px);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 18px;
}
.bt-home .project h3 em { font-style: italic; font-variation-settings: "ital" var(--display-ital); color: var(--accent); }
.bt-home .project p { color: var(--ink-dim); font-size: 15px; line-height: 1.65; margin-bottom: 24px; }
.bt-home .project-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.bt-home .project-stats .stat-label { font-family: "JetBrains Mono", monospace; font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 6px; }
.bt-home .project-stats .stat-value { font-family: var(--display-font); font-weight: var(--display-weight); font-size: 22px; letter-spacing: -0.02em; color: var(--ink); }
.bt-home .project-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.bt-home .project-link:hover { border-bottom-color: var(--accent); }
.bt-home .project-visual {
  aspect-ratio: 4/3;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 14px;
  position: relative;
  overflow: hidden;
}

/* ---------- Process ---------- */
.bt-home .process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
@media (max-width: 880px) { .bt-home .process-grid { grid-template-columns: 1fr; } }
.bt-home .step { padding: 40px 28px; border-right: 1px solid var(--line); }
.bt-home .step:last-child { border-right: none; }
@media (max-width: 880px) { .bt-home .step { border-right: none; border-bottom: 1px solid var(--line); } .bt-home .step:last-child { border-bottom: none; } }
.bt-home .step-num { font-family: "JetBrains Mono", monospace; font-size: 11px; letter-spacing: 0.2em; color: var(--accent); margin-bottom: 28px; }
.bt-home .step h4 {
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  font-size: 26px;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 14px;
}
.bt-home .step p { color: var(--ink-dim); font-size: 14px; line-height: 1.6; }

/* ---------- About ---------- */
.bt-home .about-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 72px; align-items: start; }
@media (max-width: 880px) { .bt-home .about-grid { grid-template-columns: 1fr; gap: 40px; } }
.bt-home .about-photo {
  aspect-ratio: 4/5;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}
.bt-home .about-body p {
  font-family: var(--display-font);
  font-weight: var(--display-weight);
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
  color: var(--ink);
}
.bt-home .about-body p em { font-style: italic; font-variation-settings: "ital" var(--display-ital); color: var(--accent); }
.bt-home .about-meta { margin-top: 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding-top: 28px; border-top: 1px solid var(--line); }
.bt-home .about-meta .label { font-family: "JetBrains Mono", monospace; font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-dim); margin-bottom: 6px; }
.bt-home .about-meta .value { font-size: 14px; color: var(--ink); }

/* ---------- Contact ---------- */
.bt-home .contact { text-align: center; padding: 160px 0; }
.bt-home .contact h2 {
  font-size: clamp(56px, 9vw, 140px);
  font-style: italic;
  font-variation-settings: "ital" var(--display-ital);
  line-height: 0.95;
  margin-bottom: 36px;
}
.bt-home .contact h2 em { font-style: normal; color: var(--accent); font-variation-settings: "ital" 0; }
.bt-home .contact p { color: var(--ink-dim); max-width: 480px; margin: 0 auto 40px; font-size: 16px; line-height: 1.6; }
.bt-home .contact-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.bt-home .bt-footer { border-top: 1px solid var(--line); padding: 40px 0; }
.bt-home .footer-inner { display: flex; justify-content: space-between; align-items: center; font-family: "JetBrains Mono", monospace; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-dim); }
.bt-home .footer-links { display: flex; gap: 24px; }
.bt-home .footer-links a:hover { color: var(--ink); }
@media (max-width: 600px) { .bt-home .footer-inner { flex-direction: column; gap: 16px; text-align: center; } }

/* ---------- Mobile refinements ---------- */
@media (max-width: 720px) {
  .bt-home .hero { padding: 120px 0 80px; }
  .bt-home .hero h2.display { font-size: clamp(36px, 10vw, 52px); margin: 20px auto 22px; }
  .bt-home .hero-sub { font-size: 15px; margin-bottom: 32px; }
  .bt-home .hero-cta { flex-wrap: wrap; justify-content: center; gap: 10px; }
  .bt-home .btn { padding: 14px 22px; font-size: 11px; }
  .bt-home .marquee-item { font-size: 24px; gap: 32px; }
  .bt-home .marquee-track { gap: 32px; }
  .bt-home .section-head h2 { font-size: clamp(32px, 8vw, 42px); }
  .bt-home .section-head { margin-bottom: 48px; }
  .bt-home .project h3 { font-size: clamp(26px, 6vw, 32px); }
  .bt-home .project-visual { aspect-ratio: 16/10; }
  .bt-home .project-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .bt-home .project-stats .stat-value { font-size: 18px; }
  .bt-home .contact { padding: 80px 0; }
  .bt-home .contact h2 { font-size: clamp(36px, 10vw, 56px); margin-bottom: 24px; }
  .bt-home .about-body p { font-size: clamp(20px, 4vw, 24px); }
  .bt-home .about-meta { grid-template-columns: 1fr 1fr; gap: 16px; }
  .bt-home .step h4 { font-size: 22px; }
  .bt-home .nav { padding: 16px 22px; }
}

/* Hamburger menu for mobile */
.bt-home .nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--ink); }
.bt-home .nav-toggle svg { width: 22px; height: 22px; }
@media (max-width: 720px) {
  .bt-home .nav-toggle { display: block; }
  .bt-home .nav-links {
    display: none;
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    height: 100dvh;
    background: color-mix(in oklab, var(--bg) 52%, transparent);
    backdrop-filter: blur(36px) saturate(150%);
    -webkit-backdrop-filter: blur(36px) saturate(150%);
    border-left: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    justify-content: space-evenly;
    gap: 0;
    padding: 78px 28px 28px;
    font-family: "JetBrains Mono", monospace;
    font-size: 15px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink);
    z-index: 100;
    overflow: hidden;
  }
  .bt-home .nav-links.open { display: flex; }
  .bt-home .nav-links a {
    color: var(--ink);
    flex: 1 1 0;
    min-height: 0;
    padding: 0 4px;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: color 0.2s, padding-left 0.2s;
  }
  .bt-home .nav-links a:last-child { border-bottom: none; }
  .bt-home .nav-links a::after {
    content: "→";
    font-size: 14px;
    color: var(--accent);
    opacity: 0.55;
    transition: transform 0.2s, opacity 0.2s;
  }
  .bt-home .nav-links a:hover,
  .bt-home .nav-links a:active { color: var(--accent); padding-left: 8px; }
  .bt-home .nav-links a:hover::after,
  .bt-home .nav-links a:active::after { transform: translateX(4px); opacity: 1; }
  .bt-home .nav-links .nav-close {
    position: absolute; top: 18px; right: 22px;
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    font-size: 28px; line-height: 1;
    color: var(--ink); cursor: pointer;
    font-family: "JetBrains Mono", monospace;
    border: 1px solid var(--line);
    border-radius: 100px;
  }
}

/* Touch: disable hover effects that don't work on touch */
@media (hover: none) {
  .bt-home .project:hover { transform: none; }
  .bt-home .btn-primary:hover { transform: none; }
}