/* ============================================
   KEYLAB — Mechanical Keyboard Atelier
   Industrial Brutalist Theme
   ============================================ */

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #161616;
  --bg-elevated: #1e1e1e;
  --text-primary: #f0f0f0;
  --text-secondary: #888888;
  --text-muted: #555555;
  --accent: #ff5722;
  --accent-glow: #ff572244;
  --border: #222222;
  --border-hover: #ff5722;
  --font-display: 'JetBrains Mono', monospace;
  --font-body: 'Space Mono', monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-primary);
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

.noise {
  position: fixed; inset: 0; z-index: 9999; pointer-events: none; opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat; background-size: 128px 128px;
}

/* NAV */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0 2rem; height: 64px; backdrop-filter: blur(16px);
  background: rgba(10,10,10,0.85); border-bottom: 1px solid var(--border);
  transition: all 0.3s var(--ease);
}
.nav-inner { max-width: 1400px; margin: 0 auto; height: 100%; display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--font-display); font-size: 1.2rem; font-weight: 800; letter-spacing: 0.1em; display: flex; align-items: center; gap: 2px; }
.logo-bracket { color: var(--accent); }
.logo-text { color: var(--text-primary); }
.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  font-family: var(--font-display); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--text-secondary); text-decoration: none;
  position: relative; padding: 0.3rem 0; transition: color 0.3s var(--ease);
}
.nav-links a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 1px; background: var(--accent); transition: width 0.3s var(--ease); }
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  font-family: var(--font-display); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--bg-primary); background: var(--accent); border: none;
  padding: 0.6rem 1.2rem; cursor: pointer; display: flex; align-items: center; gap: 0.5rem; transition: all 0.3s var(--ease);
}
.nav-cta:hover { background: var(--text-primary); transform: translateY(-1px); }

/* HERO */
#hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding: 120px 2rem 2rem; position: relative; }
.hero-grid { max-width: 1400px; margin: 0 auto; width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero-tag {
  font-family: var(--font-display); font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent); display: flex; align-items: center; gap: 0.75rem; margin-bottom: 2rem;
}
.tag-dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; box-shadow: 0 0 0 0 var(--accent-glow); } 50% { opacity: 0.7; box-shadow: 0 0 0 8px transparent; } }
.hero-title {
  font-family: var(--font-display); font-size: clamp(3rem, 7vw, 6.5rem); font-weight: 800;
  line-height: 0.95; letter-spacing: -0.03em; margin-bottom: 2rem;
}
.highlight { color: var(--accent); position: relative; }
.highlight::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 4px; background: var(--accent); opacity: 0.3; }
.hero-desc { font-size: 0.95rem; color: var(--text-secondary); max-width: 480px; line-height: 1.7; margin-bottom: 2.5rem; }
.hero-actions { display: flex; gap: 1rem; margin-bottom: 3rem; }
.btn-primary {
  font-family: var(--font-display); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; background: var(--accent); color: var(--bg-primary); border: none;
  padding: 1rem 2rem; cursor: pointer; display: flex; align-items: center; gap: 0.75rem;
  transition: all 0.3s var(--ease); position: relative; overflow: hidden;
}
.btn-primary::before { content: ''; position: absolute; inset: 0; background: var(--text-primary); transform: translateX(-101%); transition: transform 0.4s var(--ease); }
.btn-primary:hover::before { transform: translateX(0); }
.btn-primary i { position: relative; z-index: 1; }
.btn-ghost {
  font-family: var(--font-display); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; background: transparent; color: var(--text-secondary); border: 1px solid var(--border);
  padding: 1rem 2rem; cursor: pointer; display: flex; align-items: center; gap: 0.75rem; transition: all 0.3s var(--ease);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.hero-stats { display: flex; gap: 3rem; }
.stat { display: flex; flex-direction: column; gap: 0.3rem; }
.stat-num { font-family: var(--font-display); font-size: 2.5rem; font-weight: 800; color: var(--text-primary); line-height: 1; }
.stat-label { font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-muted); line-height: 1.3; }
.hero-right { position: relative; }
.hero-img-wrap { position: relative; border: 1px solid var(--border); overflow: hidden; }
.hero-img-wrap img { width: 100%; height: auto; display: block; transition: transform 0.6s var(--ease); filter: brightness(0.9) contrast(1.1); }
.hero-img-wrap:hover img { transform: scale(1.03); }
.hero-img-label {
  position: absolute; bottom: 0; left: 0; right: 0; padding: 1rem 1.5rem;
  background: linear-gradient(transparent, rgba(10,10,10,0.9));
  font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--text-muted); display: flex; align-items: center; gap: 0.75rem;
}
.label-line { width: 24px; height: 1px; background: var(--accent); }
.scroll-indicator {
  position: absolute; bottom: 2rem; left: 2rem; display: flex; flex-direction: column; align-items: center; gap: 0.75rem;
  font-family: var(--font-display); font-size: 0.55rem; letter-spacing: 0.2em; color: var(--text-muted);
}
.scroll-line { width: 1px; height: 48px; background: linear-gradient(var(--accent), transparent); animation: scrollPulse 2s ease-in-out infinite; }
@keyframes scrollPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

/* MARQUEE */
.marquee { padding: 1rem 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); overflow: hidden; white-space: nowrap; }
.marquee-track { display: inline-flex; gap: 2rem; animation: marquee 30s linear infinite; }
.marquee-track span { font-family: var(--font-display); font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-muted); }
span.marquee-dot { color: var(--accent); font-size: 0.5rem; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* SECTION HEADER */
.section-header {
  max-width: 1400px; margin: 0 auto; padding: 6rem 2rem 3rem;
  display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; gap: 0 2rem;
}
.section-num {
  font-family: var(--font-display); font-size: 0.65rem; letter-spacing: 0.2em; color: var(--accent);
  grid-row: 1 / 3; writing-mode: vertical-lr; transform: rotate(180deg); align-self: start; padding-top: 0.5rem;
}
.section-title {
  font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 800;
  line-height: 0.95; letter-spacing: -0.02em;
}
.section-desc { font-size: 0.9rem; color: var(--text-secondary); max-width: 500px; margin-top: 1rem; grid-column: 2; line-height: 1.7; }

/* BOARDS */
.boards-grid { max-width: 1400px; margin: 0 auto; padding: 0 2rem 6rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.board-card { background: var(--bg-card); border: 1px solid var(--border); position: relative; transition: all 0.4s var(--ease); cursor: pointer; overflow: hidden; }
.board-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.4s var(--ease); }
.board-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.board-card:hover::before { transform: scaleX(1); }
.board-img-wrap { position: relative; aspect-ratio: 1 / 1; background: var(--bg-secondary); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.board-img-wrap img { width: 85%; height: 85%; object-fit: contain; transition: transform 0.5s var(--ease); filter: brightness(0.95); }
.board-card:hover .board-img-wrap img { transform: scale(1.05) rotate(-1deg); }
.board-badge {
  position: absolute; top: 1rem; right: 1rem; font-family: var(--font-display); font-size: 0.55rem; font-weight: 700;
  letter-spacing: 0.15em; padding: 0.35rem 0.75rem; background: var(--accent); color: var(--bg-primary);
}
.board-info { padding: 1.5rem; }
.board-name { font-family: var(--font-display); font-size: 1.1rem; font-weight: 800; letter-spacing: 0.08em; margin-bottom: 0.3rem; }
.board-layout { font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.2em; color: var(--text-muted); margin-bottom: 1rem; }
.board-price { font-family: var(--font-display); font-size: 1.8rem; font-weight: 800; color: var(--accent); margin-bottom: 1rem; }
.price-unit { font-size: 1rem; color: var(--text-muted); }
.board-desc { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 1.25rem; }
.board-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.tag {
  font-family: var(--font-display); font-size: 0.55rem; font-weight: 700; letter-spacing: 0.12em;
  padding: 0.3rem 0.6rem; border: 1px solid var(--border); color: var(--text-muted); transition: all 0.3s var(--ease);
}
.board-card:hover .tag { border-color: var(--text-muted); }

/* SWITCH GUIDE */
.switch-interactive { max-width: 1400px; margin: 0 auto; padding: 0 2rem 6rem; }
.switch-display { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-bottom: 2rem; }
.switch-img-wrap { border: 1px solid var(--border); overflow: hidden; aspect-ratio: 4 / 3; }
.switch-img-wrap img { width: 100%; height: 100%; object-fit: cover; filter: brightness(0.85) contrast(1.1); transition: transform 0.6s var(--ease); }
.switch-img-wrap:hover img { transform: scale(1.04); }
.switch-info-panel { display: flex; flex-direction: column; justify-content: center; padding: 2rem; background: var(--bg-card); border: 1px solid var(--border); }
.switch-type-label { font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.3em; color: var(--accent); margin-bottom: 0.5rem; }
.switch-name { font-family: var(--font-display); font-size: 2rem; font-weight: 800; margin-bottom: 1rem; }
.switch-desc { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 1.5rem; }
.switch-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.spec-item { display: flex; justify-content: space-between; padding: 0.6rem 0; border-bottom: 1px solid var(--border); }
.spec-key { font-family: var(--font-display); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); }
.spec-val { font-family: var(--font-display); font-size: 0.75rem; font-weight: 700; color: var(--text-primary); }
.switch-selector { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.switch-btn {
  background: var(--bg-card); border: 1px solid var(--border); padding: 1.5rem; cursor: pointer; text-align: left;
  transition: all 0.3s var(--ease); display: flex; flex-direction: column; gap: 0.75rem;
}
.switch-btn:hover, .switch-btn.active { border-color: var(--accent); background: var(--bg-elevated); }
.switch-btn.active { box-shadow: inset 0 0 0 1px var(--accent); }
.switch-btn-icon { font-size: 1.5rem; color: var(--text-muted); transition: color 0.3s var(--ease); }
.switch-btn:hover .switch-btn-icon, .switch-btn.active .switch-btn-icon { color: var(--accent); }
.switch-btn-name { font-family: var(--font-display); font-size: 0.85rem; font-weight: 800; letter-spacing: 0.15em; color: var(--text-primary); }
.switch-btn-sub { font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.1em; color: var(--text-muted); }

/* BUILD */
.build-steps { max-width: 1400px; margin: 0 auto; padding: 0 2rem 6rem; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); }
.build-step { background: var(--bg-primary); padding: 2.5rem 2rem; position: relative; transition: all 0.4s var(--ease); opacity: 0; transform: translateY(20px); }
.build-step.visible { opacity: 1; transform: translateY(0); transition-delay: var(--step-delay); }
.build-step:hover { background: var(--bg-card); }
.build-step::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.5s var(--ease); }
.build-step:hover::before { transform: scaleX(1); }
.step-num { font-family: var(--font-display); font-size: 3rem; font-weight: 800; color: var(--bg-elevated); line-height: 1; margin-bottom: 1.5rem; transition: color 0.3s var(--ease); }
.build-step:hover .step-num { color: var(--accent); }
.step-icon { font-size: 1.5rem; color: var(--accent); margin-bottom: 1rem; }
.step-title { font-family: var(--font-display); font-size: 0.9rem; font-weight: 700; letter-spacing: 0.05em; margin-bottom: 0.75rem; }
.step-desc { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.7; }

/* GALLERY */
.gallery-grid { max-width: 1400px; margin: 0 auto; padding: 0 2rem 6rem; display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: 300px 300px; gap: 1rem; }
.gallery-item { position: relative; overflow: hidden; border: 1px solid var(--border); cursor: pointer; }
.gallery-large { grid-column: 1 / 3; grid-row: 1 / 3; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); filter: brightness(0.7); }
.gallery-item:hover img { transform: scale(1.08); filter: brightness(0.5); }
.gallery-overlay { position: absolute; inset: 0; padding: 1.5rem; display: flex; flex-direction: column; justify-content: flex-end; opacity: 0; transform: translateY(10px); transition: all 0.4s var(--ease); }
.gallery-item:hover .gallery-overlay { opacity: 1; transform: translateY(0); }
.gallery-label { font-family: var(--font-display); font-size: 0.55rem; letter-spacing: 0.2em; color: var(--accent); margin-bottom: 0.4rem; }
.gallery-title { font-family: var(--font-display); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.05em; }

/* CTA */
#cta { padding: 6rem 2rem; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-secondary); }
.cta-inner { max-width: 700px; margin: 0 auto; text-align: center; }
.cta-title { font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; line-height: 0.95; letter-spacing: -0.02em; margin-bottom: 1.5rem; }
.cta-desc { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 2.5rem; line-height: 1.7; }
.cta-form { display: flex; margin-bottom: 2rem; max-width: 480px; margin-left: auto; margin-right: auto; }
.cta-form input { flex: 1; font-family: var(--font-body); font-size: 0.85rem; padding: 1rem 1.25rem; background: var(--bg-primary); border: 1px solid var(--border); border-right: none; color: var(--text-primary); outline: none; transition: border-color 0.3s var(--ease); }
.cta-form input::placeholder { color: var(--text-muted); }
.cta-form input:focus { border-color: var(--accent); }
.cta-form button { font-family: var(--font-display); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; background: var(--accent); color: var(--bg-primary); border: none; padding: 1rem 1.5rem; cursor: pointer; display: flex; align-items: center; gap: 0.5rem; white-space: nowrap; transition: background 0.3s var(--ease); }
.cta-form button:hover { background: #ff6e40; }
.cta-trust { display: flex; justify-content: center; gap: 2.5rem; }
.trust-item { font-family: var(--font-display); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--text-muted); display: flex; align-items: center; gap: 0.5rem; }
.trust-item i { font-size: 1rem; color: var(--accent); }

/* FOOTER */
footer { max-width: 1400px; margin: 0 auto; padding: 4rem 2rem 2rem; }
.footer-top { display: grid; grid-template-columns: 1fr 2fr; gap: 4rem; margin-bottom: 3rem; padding-bottom: 2rem; border-bottom: 1px solid var(--border); }
.footer-brand p { font-size: 0.82rem; color: var(--text-muted); margin-top: 1rem; max-width: 300px; line-height: 1.7; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.footer-col h4 { font-family: var(--font-display); font-size: 0.65rem; letter-spacing: 0.2em; color: var(--text-primary); margin-bottom: 1rem; }
.footer-col a { display: block; font-size: 0.82rem; color: var(--text-muted); text-decoration: none; padding: 0.3rem 0; transition: color 0.3s var(--ease); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.1em; color: var(--text-muted); }
.footer-socials { display: flex; gap: 1rem; }
.footer-socials a { font-size: 1.2rem; color: var(--text-muted); text-decoration: none; transition: color 0.3s var(--ease); }
.footer-socials a:hover { color: var(--accent); }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
  .boards-grid { grid-template-columns: 1fr 1fr; }
  .build-steps { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); grid-template-rows: 250px 250px 250px; }
  .gallery-large { grid-column: 1 / 3; grid-row: 1 / 2; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .boards-grid { grid-template-columns: 1fr; }
  .switch-display { grid-template-columns: 1fr; }
  .switch-selector { grid-template-columns: 1fr; }
  .build-steps { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .gallery-large { grid-column: 1; grid-row: auto; }
  .gallery-item { aspect-ratio: 16 / 9; }
  .footer-top { grid-template-columns: 1fr; }
  .cta-trust { flex-direction: column; align-items: center; gap: 1rem; }
  .hero-stats { gap: 1.5rem; }
  .hero-actions { flex-direction: column; }
}

/* ANIMATIONS */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.toast {
  position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%) translateY(100px);
  background: var(--accent); color: var(--bg-primary); font-family: var(--font-display); font-size: 0.75rem;
  font-weight: 700; letter-spacing: 0.1em; padding: 1rem 2rem; z-index: 10000; opacity: 0;
  transition: all 0.4s var(--ease-bounce);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }