/* ─────────────────────────────────────────────────────────────────────────
   Project page — shared styles
   Used by /projects/0X-*.html
   ──────────────────────────────────────────────────────────────────────── */

:root {
  --bg: #06070d;
  --bg-elev: #0d1220;
  --bg-card: #12141c;
  --bg-card-hover: #161924;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.14);
  --text: #e7ecf5;
  --text-dim: #9aa3b8;
  --text-faint: #5a5f6e;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --accent-3: #f472b6;
  --danger: #ff5a72;
  --success: #34d399;
  --warning: #fbbf24;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --max-w: 1240px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
code, pre, .mono { font-family: 'JetBrains Mono', monospace; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: white; }

.bg-stage {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(1100px 700px at 78% -10%, rgba(124,92,255,0.18), transparent 60%),
    radial-gradient(900px 600px at -10% 40%, rgba(34,211,238,0.12), transparent 60%),
    radial-gradient(800px 500px at 50% 110%, rgba(244,114,182,0.10), transparent 55%),
    linear-gradient(180deg, #050610 0%, #08091a 100%);
}
.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.85) 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.85) 0%, transparent 75%);
}

nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  background: rgba(8,9,14,0.7);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.crumbs {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; letter-spacing: 0.08em;
  color: var(--text-dim);
  display: flex; align-items: center; gap: 12px;
  flex-wrap: wrap;
}
.crumbs a { color: var(--text-dim); transition: color 0.15s; }
.crumbs a:hover { color: var(--accent); }
.crumbs .sep { color: var(--text-faint); }
.crumbs .here { color: var(--text); }
.nav-status {
  display: flex; align-items: center; gap: 14px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  color: var(--text-dim);
  flex-wrap: wrap;
}
.nav-status .pill {
  padding: 4px 10px; border-radius: 100px;
  font-size: 10.5px; letter-spacing: 0.08em;
  text-transform: uppercase; font-weight: 600;
}
.pill-scaffold {
  background: rgba(251,191,36,0.1);
  color: var(--warning);
  border: 1px solid rgba(251,191,36,0.3);
}
.pill-planned {
  background: rgba(124,92,255,0.1);
  color: var(--accent);
  border: 1px solid rgba(124,92,255,0.3);
}
.pill-live {
  background: rgba(52,211,153,0.1);
  color: var(--success);
  border: 1px solid rgba(52,211,153,0.3);
}
.nav-cta {
  padding: 7px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  transition: all 0.15s;
}
.nav-cta:hover { border-color: var(--accent); background: rgba(124,92,255,0.08); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* HERO */
.hero { padding: 70px 0 50px; }
.hero-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; letter-spacing: 0.18em;
  color: var(--accent-2); text-transform: uppercase;
  margin-bottom: 18px;
  display: flex; align-items: center; gap: 12px;
}
.hero-eyebrow::before {
  content: ''; width: 28px; height: 1px; background: var(--accent-2);
}
.hero h1 {
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.04;
  margin-bottom: 24px;
  max-width: 1000px;
  background: linear-gradient(180deg, #ffffff 30%, #8b91a3 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero h1 .em {
  background: linear-gradient(110deg, #fff 0%, var(--accent) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .lede {
  font-size: clamp(16px, 1.55vw, 18px);
  color: var(--text-dim);
  max-width: 740px;
  line-height: 1.65;
  margin-bottom: 32px;
}
.hero .lede strong { color: var(--text); font-weight: 600; }

.meta-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 40px;
  padding: 22px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
@media (max-width: 720px) { .meta-strip { grid-template-columns: repeat(2, 1fr); gap: 22px 0; padding: 22px 0 12px; } }
.meta-strip > div {
  padding: 0 22px;
  border-right: 1px solid var(--border);
}
.meta-strip > div:last-child { border-right: 0; }
.meta-strip > div:first-child { padding-left: 0; }
.meta-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.12em;
  color: var(--text-faint); text-transform: uppercase;
  margin-bottom: 8px; font-weight: 600;
}
.meta-value {
  font-size: 14px; color: var(--text); font-weight: 500;
  line-height: 1.4;
}
.meta-value .alt {
  color: var(--text-dim); font-size: 12px; font-family: 'JetBrains Mono', monospace;
}

section { padding: 70px 0 30px; }
.section-head { margin-bottom: 32px; }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px; letter-spacing: 0.14em;
  color: var(--accent); text-transform: uppercase;
  font-weight: 600; margin-bottom: 14px;
}
.section-eyebrow::before { content: ''; width: 22px; height: 1px; background: var(--accent); }
h2 {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.12;
  margin-bottom: 14px;
  max-width: 800px;
}
.section-sub {
  color: var(--text-dim);
  font-size: 15.5px;
  max-width: 720px;
  line-height: 1.6;
}

.overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 32px;
}
@media (max-width: 900px) { .overview { grid-template-columns: 1fr; } }
.ov-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}
.ov-card-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.12em;
  text-transform: uppercase; font-weight: 600;
  margin-bottom: 12px;
}
.ov-card.problem .ov-card-tag { color: var(--danger); }
.ov-card.solution .ov-card-tag { color: var(--success); }
.ov-card h4 {
  font-size: 18px; font-weight: 700;
  letter-spacing: -0.015em; margin-bottom: 12px;
  line-height: 1.35;
}
.ov-card p {
  font-size: 14px; color: var(--text-dim);
  line-height: 1.65;
}
.ov-card p + p { margin-top: 10px; }
.ov-card strong { color: var(--text); font-weight: 600; }

.demo-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 32px;
}
.demo-head {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}
.demo-head-left {
  display: flex; align-items: center; gap: 18px;
  flex-wrap: wrap;
}
.demo-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  color: var(--accent-2);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 4px 9px;
  border: 1px solid rgba(34,211,238,0.3);
  background: rgba(34,211,238,0.08);
  border-radius: 5px;
}
.demo-title { font-size: 15.5px; font-weight: 600; letter-spacing: -0.01em; }
.demo-desc {
  font-size: 12.5px; color: var(--text-dim);
  margin-top: 2px;
  font-family: 'JetBrains Mono', monospace;
}
.demo-hints {
  display: flex; gap: 16px; align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--text-faint);
  letter-spacing: 0.04em;
}
.demo-hints kbd {
  display: inline-block;
  padding: 1px 7px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text);
  margin-right: 5px;
}
.demo-body {
  height: clamp(560px, 80vh, 780px);
  position: relative;
  background: #06070d;
}
@media (max-width: 900px) { .demo-body { height: clamp(480px, 72vh, 620px); } }

.arch-figure {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  margin-bottom: 32px;
}
.arch-figure h5 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--text-faint);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 18px;
}
.arch-figure svg { width: 100%; height: auto; display: block; }

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 24px;
}
@media (max-width: 900px) { .detail-grid { grid-template-columns: 1fr; } }
.detail-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}
.detail-card h4 {
  font-size: 15px; font-weight: 600;
  letter-spacing: -0.01em; margin-bottom: 16px;
  display: flex; align-items: center; gap: 10px;
}
.detail-card h4::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); flex-shrink: 0;
  box-shadow: 0 0 8px var(--accent);
}
.detail-card.cyan h4::before { background: var(--accent-2); box-shadow: 0 0 8px var(--accent-2); }
.detail-card.pink h4::before { background: var(--accent-3); box-shadow: 0 0 8px var(--accent-3); }
.detail-card.green h4::before { background: var(--success); box-shadow: 0 0 8px var(--success); }

.stack-group { margin-bottom: 16px; }
.stack-group:last-child { margin-bottom: 0; }
.stack-group-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.1em;
  color: var(--text-faint); text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 10px;
}
.stack-pills { display: flex; flex-wrap: wrap; gap: 6px; }
.stack-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  padding: 5px 11px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  transition: all 0.15s;
}
.stack-pill:hover { color: var(--text); border-color: var(--border-strong); }
.stack-pill .ver { color: var(--accent-2); margin-left: 4px; opacity: 0.7; }

.roadmap-list { list-style: none; }
.roadmap-list li {
  display: grid;
  grid-template-columns: 28px 28px 1fr;
  align-items: start;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.06);
  font-size: 13.5px;
  line-height: 1.5;
}
.roadmap-list li:last-child { border-bottom: 0; }
.roadmap-list li .num {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-faint);
  font-size: 11px;
  text-align: right;
  padding-top: 2px;
}
.roadmap-list li .check {
  width: 18px; height: 18px; border-radius: 5px;
  margin-top: 2px;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px;
}
.roadmap-list li.done .check {
  background: rgba(52,211,153,0.15);
  border: 1px solid rgba(52,211,153,0.4);
  color: var(--success);
}
.roadmap-list li.partial .check {
  background: rgba(251,191,36,0.12);
  border: 1px solid rgba(251,191,36,0.35);
  color: var(--warning);
}
.roadmap-list li.todo .check {
  border: 1px solid var(--border-strong);
  color: transparent;
}
.roadmap-list li.done .label,
.roadmap-list li.partial .label { color: var(--text); }
.roadmap-list li.todo .label { color: var(--text-dim); }

.next-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  display: flex; justify-content: space-between; align-items: center;
  transition: all 0.2s;
  margin-bottom: 50px;
  gap: 20px;
  flex-wrap: wrap;
}
.next-card:hover {
  border-color: var(--accent);
  background: rgba(124,92,255,0.06);
  transform: translateY(-2px);
}
.next-card .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.12em;
  color: var(--text-faint); text-transform: uppercase;
  margin-bottom: 8px;
}
.next-card h3 {
  font-size: 22px; font-weight: 700;
  letter-spacing: -0.02em;
}
.next-card .arrow { font-size: 28px; color: var(--accent); }

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; color: var(--text-faint);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap;
  gap: 16px;
}

/* Animations */
@keyframes p-caret { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
@keyframes p-line-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes p-msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes p-pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.6; }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.reveal.in { opacity: 1; transform: translateY(0); }