/* ========================================
   OpenIT Landing Page — Terminal-native
   ======================================== */

:root {
  --bg: #0f1419;
  --bg-surface: #161b22;
  --bg-elevated: #1c2128;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-dim: #484f58;
  --accent: #39d353;
  --accent-dim: #238636;
  --accent-glow: rgba(57, 211, 83, 0.15);
  --yellow: #e3b341;
  --red: #f85149;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-mono-body: 'IBM Plex Mono', monospace;
  --font-sans: 'IBM Plex Sans', system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ========================================
   NAV
   ======================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 20, 25, 0.9);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo-prompt { color: var(--text-muted); }
.logo-name { color: var(--accent); }
.nav-links { display: flex; gap: 24px; }
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-family: var(--font-mono);
  transition: color 0.15s;
}
.nav-link:hover { color: var(--text); }
.nav-cta {
  background: var(--accent);
  color: #0d1117 !important;
  padding: 6px 16px;
  border-radius: 6px;
  font-weight: 700;
  transition: background 0.15s;
}
.nav-cta:hover { background: #4ade5b !important; color: #0d1117 !important; }

/* ========================================
   HERO
   ======================================== */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 100px 24px 64px;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.eyebrow-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 20px;
}
.eyebrow-sep { color: var(--text-dim); }
.hero-headline {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text);
}
.headline-accent { color: var(--accent); }
.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.hero-version { color: var(--accent); }
.hero-dot { color: var(--text-dim); }
.hero-gh { color: var(--text-muted); text-decoration: none; }
.hero-gh:hover { color: var(--text); }

/* ========================================
   TERMINAL DEMO
   ======================================== */
.terminal-demo {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 80px;
}
.terminal-window {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(57, 211, 83, 0.08);
  max-width: 720px;
}
.terminal-bar {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tb-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.tb-red { background: #ff5f56; }
.tb-yellow { background: #ffbd2e; }
.tb-green { background: #27c93f; }
.tb-title {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.terminal-body {
  padding: 24px 28px;
  font-family: var(--font-mono-body);
  font-size: 0.875rem;
  line-height: 1.8;
}
.t-spacer { height: 12px; }
.t-prompt { color: var(--accent); margin-right: 8px; }
.t-cmd { color: var(--text-dim); }
.t-channel { color: var(--text-muted); margin: 0 8px; }
.t-msg { color: var(--text); }
.t-time { color: var(--yellow); margin-left: 8px; font-size: 0.75rem; }
.t-success { color: var(--accent); }
.t-dim { color: var(--text-muted); }

/* ========================================
   SECTIONS
   ======================================== */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
}
.section-body {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: 56px;
}

/* ========================================
   HOW IT WORKS
   ======================================== */
.how-works {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
  border-top: 1px solid var(--border);
}
.workflow-steps {
  display: flex;
  flex-direction: column;
}
.ws-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.ws-step:last-child { border-bottom: none; }
.ws-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-dim);
  line-height: 1;
  padding-top: 4px;
}
.ws-content h3 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.ws-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ========================================
   FEATURES
   ======================================== */
.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
  border-top: 1px solid var(--border);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.feature-card {
  background: var(--bg-surface);
  padding: 32px 28px;
}
.fc-icon {
  color: var(--accent);
  margin-bottom: 16px;
}
.fc-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.fc-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ========================================
   COMPARE
   ======================================== */
.compare {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
  border-top: 1px solid var(--border);
}
.compare-header { margin-bottom: 48px; }
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.compare-col { padding: 36px 32px; }
.compare-old {
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
}
.compare-new {
  background: var(--bg-elevated);
}
.cc-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.compare-new .cc-label { color: var(--accent); }
.cc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.cc-list li {
  font-family: var(--font-mono-body);
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-left: 20px;
  position: relative;
}
.compare-new .cc-list li { color: var(--text); }
.compare-old .cc-list li::before { content: '\2014'; position: absolute; left: 0; color: var(--text-dim); }
.compare-new .cc-list li::before { content: '\2192'; position: absolute; left: 0; color: var(--accent); }

/* ========================================
   OPEN SOURCE
   ======================================== */
.open-source {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
  border-top: 1px solid var(--border);
}
.os-inner {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 48px;
}
.os-badge { color: var(--accent); flex-shrink: 0; padding-top: 4px; }
.os-title {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.os-body {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 28px;
}
.os-links { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.15s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #0d1117;
}
.btn-primary:hover { background: #4ade5b; }
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-muted); }

/* ========================================
   CLOSING
   ======================================== */
.closing {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px 100px;
  text-align: center;
  border-top: 1px solid var(--border);
}
.closing-title {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 24px;
}
.closing-body {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.75;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand { display: flex; flex-direction: column; gap: 4px; }
.footer-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
}
.footer-tagline {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}
.footer-links { display: flex; gap: 20px; }
.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.footer-link:hover { color: var(--text); }
.footer-copy {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  .hero { padding: 64px 20px 48px; }
  .terminal-demo { padding: 0 20px 60px; }
  .how-works, .features, .compare, .open-source, .closing { padding: 60px 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .compare-old { border-right: none; border-bottom: 1px solid var(--border); }
  .ws-step { grid-template-columns: 48px 1fr; gap: 20px; }
  .os-inner { flex-direction: column; gap: 24px; padding: 32px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .hero-meta { flex-wrap: wrap; }
}