/* ─── REVENGINE SHARED DESIGN SYSTEM ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-base:        #0d0f1a;
  --bg-surface:     #13151f;
  --bg-card:        #191b28;
  --bg-card-alt:    #1e2030;
  --bg-hover:       #202234;
  --border:         #252840;
  --border-dim:     #1c1e30;
  --border-bright:  #34385a;
  --text-primary:   #e8e8f2;
  --text-secondary: #7878a0;
  --text-dim:       #4a4a6a;
  --accent:         #7c3aed;
  --accent-bright:  #9d5ff5;
  --accent-glow:    #a78bfa;
  --accent-dim:     #2d1a5a;
  --accent-bg:      rgba(124, 58, 237, 0.08);
  --accent-border:  rgba(124, 58, 237, 0.25);
  --green:          #22c55e;
  --green-bg:       rgba(34, 197, 94, 0.08);
  --yellow:         #f59e0b;
  --red:            #ef4444;
  --blue:           #3b82f6;
  --nav-height:     60px;
  --content-width:  1000px;
  --sidebar-width:  240px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Noise overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.35;
}

/* ─── NAV ─── */
nav.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  border-bottom: 1px solid var(--border-dim);
  background: rgba(13, 15, 26, 0.88);
  backdrop-filter: blur(14px);
  gap: 2rem;
}

.nav-left { display: flex; align-items: center; gap: 2.5rem; }
.nav-links { display: flex; align-items: center; gap: 0.25rem; }

.wordmark {
  font-family: 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  user-select: none;
  flex-shrink: 0;
}
.wordmark .rev   { color: var(--accent-glow); }
.wordmark .eng   { color: var(--text-primary); }

.nav-link {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover  { color: var(--text-primary); background: rgba(255,255,255,0.04); }
.nav-link.active { color: var(--text-primary); }

.btn-nav {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-glow);
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
  padding: 0.38rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-nav:hover {
  background: rgba(124,58,237,0.16);
  border-color: rgba(167,139,250,0.4);
  color: #c4b5fd;
}

/* ─── BUTTONS ─── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.65rem 1.3rem;
  background: var(--accent);
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: 0 0 20px rgba(124,58,237,0.25);
}
.btn-primary:hover {
  background: var(--accent-bright);
  transform: translateY(-1px);
  box-shadow: 0 4px 24px rgba(124,58,237,0.45);
}

.btn-secondary {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.65rem 1.3rem;
  background: transparent;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--border-bright);
  background: rgba(255,255,255,0.03);
}

/* ─── TYPOGRAPHY UTILITIES ─── */
.eyebrow {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-glow);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  line-height: 1.2;
}

.section-sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 520px;
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

.text-accent { color: var(--accent-glow); }
.text-secondary { color: var(--text-secondary); }
.text-dim { color: var(--text-dim); }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-yellow { color: var(--yellow); }

/* ─── LAYOUT ─── */
.page-wrap {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }

.section-divider {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

/* ─── CARDS ─── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: background 0.25s, border-color 0.25s;
}
.card:hover {
  background: var(--bg-card-alt);
  border-color: var(--border-bright);
}

.card-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
.card-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
.card-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }

.card-grid-2 > *, .card-grid-3 > *, .card-grid-4 > * {
  background: var(--bg-surface);
  border-radius: 0;
}

/* ─── BADGES / PILLS ─── */
.badge {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.28rem 0.7rem;
  border-radius: 100px;
}
.badge-accent {
  color: var(--accent-glow);
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
}
.badge-green {
  color: var(--green);
  background: var(--green-bg);
  border: 1px solid rgba(34,197,94,0.2);
}
.badge-gray {
  color: var(--text-dim);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
}

.badge .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
}

/* ─── FORMS ─── */
.input-row {
  display: flex;
  gap: 0.5rem;
}

input[type="email"],
input[type="text"] {
  padding: 0.65rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}
input::placeholder { color: var(--text-dim); }
input:focus {
  border-color: rgba(124,58,237,0.5);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.1);
}

/* ─── FOOTER ─── */
footer.site-footer {
  border-top: 1px solid var(--border-dim);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-width);
  margin: 0 auto;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-link {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-link:hover { color: var(--text-secondary); }

.footer-copy {
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* ─── SCROLL REVEAL ─── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }

/* ─── PIPELINE PILL STYLES ─── */
.stage-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  border-radius: 100px;
  white-space: nowrap;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all 0.3s;
}
.stage-pill.active {
  color: var(--accent-glow);
  background: var(--accent-bg);
  border-color: rgba(124,58,237,0.4);
  box-shadow: 0 0 10px rgba(124,58,237,0.2);
}
.stage-pill.done {
  color: var(--green);
  background: var(--green-bg);
  border-color: rgba(34,197,94,0.2);
}

/* ─── ANIMATIONS ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 18px rgba(124,58,237,0.25); }
  50%       { box-shadow: 0 0 28px rgba(124,58,237,0.45); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.75); }
}

@keyframes scanLine {
  0%   { transform: scaleX(0); transform-origin: left; opacity: 0; }
  20%  { transform: scaleX(1); transform-origin: left; opacity: 1; }
  80%  { transform: scaleX(1); transform-origin: right; opacity: 1; }
  100% { transform: scaleX(0); transform-origin: right; opacity: 0; }
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .card-grid-2, .card-grid-3, .card-grid-4 { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
}

@media (max-width: 480px) {
  nav.site-nav { padding: 0 1rem; }
  .container { padding: 0 1rem; }
  .input-row { flex-direction: column; }
}