@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600&family=Plus+Jakarta+Sans:wght@400;500;600&family=Syne:wght@600;700;800&display=swap');

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background-color: #0c0e14;
  color: #e2e8f0;
  font-family: 'Plus Jakarta Sans', sans-serif;
  line-height: 1.6;
  padding-bottom: 90px;
}

.simple-switcher {
  position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
  background: rgba(12, 14, 20, 0.95); backdrop-filter: blur(16px);
  border: 1px solid rgba(6, 182, 212, 0.35); border-radius: 40px;
  padding: 8px 16px; display: flex; align-items: center; gap: 8px;
  z-index: 9999; max-width: 95vw; overflow-x: auto; box-shadow: 0 10px 30px rgba(0,0,0,0.8);
}
.simple-switcher span { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: #06b6d4; font-weight: 600; white-space: nowrap; }
.simple-switcher a { color: #94a3b8; text-decoration: none; font-size: 12px; padding: 4px 10px; border-radius: 20px; white-space: nowrap; transition: 0.2s; }
.simple-switcher a:hover, .simple-switcher a.active { background: #06b6d4; color: #000; font-weight: 600; }

.keeb-nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 24px 6%; border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.keeb-logo { font-family: 'Syne', sans-serif; font-size: 20px; font-weight: 800; color: #06b6d4; text-decoration: none; letter-spacing: 1.5px; }
.keeb-logo span { font-size: 12px; color: #64748b; font-family: 'JetBrains Mono', monospace; margin-left: 6px; }
.keeb-menu { display: flex; gap: 28px; list-style: none; }
.keeb-menu a { color: #94a3b8; text-decoration: none; font-size: 13px; font-family: 'JetBrains Mono', monospace; transition: 0.2s; }
.keeb-menu a:hover { color: #06b6d4; }

.btn-keeb-cyan {
  background: #06b6d4; color: #000; font-family: 'Syne', sans-serif;
  font-weight: 700; padding: 12px 24px; border-radius: 6px;
  text-decoration: none; font-size: 13px; border: none; cursor: pointer; transition: 0.3s;
}
.btn-keeb-cyan:hover { background: #22d3ee; transform: translateY(-1px); box-shadow: 0 0 20px rgba(6, 182, 212, 0.4); }
.btn-keeb-ghost {
  border: 1px solid rgba(6, 182, 212, 0.3); color: #06b6d4; font-family: 'JetBrains Mono', monospace;
  padding: 12px 24px; border-radius: 6px; text-decoration: none; font-size: 13px; transition: 0.3s;
}
.btn-keeb-ghost:hover { background: rgba(6, 182, 212, 0.1); }

.keeb-hero {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center;
  padding: 60px 6% 80px; max-width: 1400px; margin: 0 auto;
}
.keeb-tag { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 1px; color: #06b6d4; }
.keeb-hero h1 { font-family: 'Syne', sans-serif; font-size: 50px; line-height: 1.1; margin: 16px 0 20px; color: #fff; font-weight: 800; }
.keeb-hero h1 em { font-style: normal; color: #06b6d4; }
.keeb-hero p { font-size: 16px; color: #94a3b8; max-width: 520px; margin-bottom: 32px; }
.keeb-hero-actions { display: flex; gap: 16px; }
.keeb-hero-media img {
  width: 100%; height: 500px; object-fit: cover; border-radius: 12px;
  border: 1px solid rgba(6, 182, 212, 0.25); box-shadow: 0 20px 50px rgba(0,0,0,0.8);
}

.stack-section { padding: 80px 6%; max-width: 1400px; margin: 0 auto; }
.stack-header span { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 2px; color: #06b6d4; text-transform: uppercase; }
.stack-header h2 { font-family: 'Syne', sans-serif; font-size: 36px; color: #fff; margin: 8px 0 36px; font-weight: 700; }
.stack-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stack-layer {
  background: #111520; border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 8px;
  padding: 28px; transition: 0.3s;
}
.stack-layer:hover { border-color: #06b6d4; transform: translateY(-4px); }
.layer-idx { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: #06b6d4; font-weight: 600; }
.stack-layer h4 { font-family: 'Syne', sans-serif; font-size: 18px; color: #fff; margin: 12px 0 10px; }
.stack-layer p { font-size: 13px; color: #94a3b8; }

.tester-section { padding: 40px 6% 100px; max-width: 1300px; margin: 0 auto; }
.tester-card {
  background: #111520; border: 1px solid rgba(6, 182, 212, 0.3); border-radius: 12px;
  padding: 44px; box-shadow: 0 20px 60px rgba(0,0,0,0.8);
}
.tester-top span { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 2px; color: #06b6d4; }
.tester-top h2 { font-family: 'Syne', sans-serif; font-size: 34px; color: #fff; margin: 8px 0 10px; }
.tester-top p { font-size: 14px; color: #94a3b8; margin-bottom: 36px; }

.tester-controls-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-bottom: 36px; }
.t-col label { display: block; font-size: 13px; color: #cbd5e1; margin-bottom: 12px; font-weight: 600; }
.pills-wrap { display: flex; gap: 8px; flex-wrap: wrap; }
.t-pill {
  background: #181f2e; border: 1px solid rgba(255, 255, 255, 0.12); color: #94a3b8;
  padding: 8px 16px; border-radius: 6px; font-size: 12px; cursor: pointer; transition: 0.2s; font-family: 'JetBrains Mono', monospace;
}
.t-pill.active, .t-pill:hover { background: #06b6d4; color: #000; font-weight: 600; border-color: #06b6d4; }

.tester-feedback-board {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; background: #0a0c12;
  border: 1px solid rgba(6, 182, 212, 0.2); border-radius: 8px; padding: 24px; margin-bottom: 36px;
}
.fb-item { text-align: center; }
.fb-label { font-size: 10px; letter-spacing: 1px; color: #64748b; font-family: 'JetBrains Mono', monospace; display: block; margin-bottom: 6px; }
.fb-val { font-family: 'Syne', sans-serif; font-size: 22px; color: #fff; font-weight: 700; display: block; }
.fb-val.cyan { color: #06b6d4; font-size: 18px; }
.fb-sub { font-size: 11px; color: #94a3b8; margin-top: 4px; display: block; }
.btn-keeb-keypress {
  background: #1e293b; border: 1px solid #06b6d4; color: #06b6d4; padding: 6px 14px;
  border-radius: 4px; font-size: 12px; font-family: 'JetBrains Mono', monospace; cursor: pointer; margin-top: 4px;
}
.btn-keeb-keypress:active { transform: scale(0.95); background: #06b6d4; color: #000; }

.tester-foot { text-align: center; }
.keeb-footer { text-align: center; padding: 40px 6%; border-top: 1px solid rgba(255, 255, 255, 0.08); color: #64748b; font-size: 13px; }

@media (max-width: 900px) {
  .keeb-hero { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr 1fr; }
  .tester-controls-grid { grid-template-columns: 1fr; }
  .tester-feedback-board { grid-template-columns: 1fr 1fr; }
}