/* ═══════════════════════════════════════════════════
  Smart Parking Spot Detection System — Documentation Site Styles
   Aesthetic: Refined Technical / Academic Dark
   Font: Syne (headings) + JetBrains Mono (code) + Instrument Serif (accents)
═══════════════════════════════════════════════════ */

/* ── TOKENS ─────────────────────────────────────── */
:root {
  --sidebar-w: 288px;
  --font-head: 'Syne', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-serif: 'Instrument Serif', serif;

  /* Phase colors */
  --phase-research: #4f8ef7;
  --phase-dev: #a78bfa;
  --phase-test: #34d399;
  --phase-refine: #fb923c;

  /* Transition */
  --trans: 0.2s ease;
}

[data-theme="dark"] {
  --bg: #0d0f14;
  --bg2: #13161d;
  --bg3: #1a1e28;
  --border: #252a37;
  --text: #d4daf0;
  --text-muted: #6b7494;
  --text-dim: #8891b4;
  --accent: #5b8ff9;
  --accent2: #a78bfa;
  --accent-glow: rgba(91,143,249,0.12);
  --green: #34d399;
  --red: #f87171;
  --amber: #fbbf24;
  --sidebar-bg: #0a0c10;
  --code-bg: #0f1117;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

[data-theme="light"] {
  --bg: #f4f5f8;
  --bg2: #ffffff;
  --bg3: #eef0f6;
  --border: #dde1ee;
  --text: #1a1e2e;
  --text-muted: #8891b4;
  --text-dim: #555e80;
  --accent: #3b6fec;
  --accent2: #7c5de8;
  --accent-glow: rgba(59,111,236,0.08);
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --sidebar-bg: #ffffff;
  --code-bg: #f0f2f8;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

/* ── RESET ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-head);
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
  line-height: 1.6;
  transition: background var(--trans), color var(--trans);
}

/* ── SIDEBAR ─────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
  transition: transform var(--trans), background var(--trans);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}
.sidebar-logo em { color: var(--accent); font-style: normal; }
.logo-icon { font-size: 1.4rem; color: var(--accent); }

.sidebar-identity {
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sidebar-project {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.sidebar-identity-grid {
  display: grid;
  gap: 10px;
}
.sidebar-identity-grid strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.35;
}
.sidebar-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--trans);
}
.nav-item:hover {
  background: var(--accent-glow);
  color: var(--accent);
}
.nav-item.active {
  background: var(--accent-glow);
  color: var(--accent);
  border-left: 3px solid var(--accent);
  padding-left: 9px;
}
.nav-icon { font-size: 0.9rem; opacity: 0.7; }

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text-dim);
  font-size: 0.8rem;
  font-family: var(--font-head);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--trans);
  width: 100%;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.toggle-icon { font-size: 1rem; }

.gh-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--trans);
}
.gh-link:hover { color: var(--accent); background: var(--accent-glow); }

/* ── HAMBURGER ───────────────────────────────────── */
.hamburger {
  display: none;
  position: fixed;
  top: 16px; left: 16px;
  z-index: 200;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 40px; height: 40px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.hamburger span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--trans);
}
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 90;
}

/* ── MAIN CONTENT ────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  width: calc(100% - var(--sidebar-w));
}

.section {
  width: 100%;
  padding: clamp(72px, 6vw, 104px) clamp(32px, 4vw, 80px);
  border-bottom: 1px solid var(--border);
  max-width: none;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 36px;
  line-height: 1.1;
}
h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  margin-top: 40px;
}
h3:first-child { margin-top: 0; }
h4 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
p { color: var(--text-dim); line-height: 1.75; margin-bottom: 12px; }
strong { color: var(--text); font-weight: 700; }
code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent2);
  border: 1px solid var(--border);
}
kbd {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--text);
}

/* ── HERO ────────────────────────────────────────── */
.hero-section {
  position: relative;
  overflow: hidden;
  padding-top: clamp(84px, 7vw, 120px);
  padding-bottom: clamp(72px, 6vw, 96px);
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.3;
  pointer-events: none;
}
.hero-title {
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 10px;
  color: var(--text);
}
.hero-subtitle {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 28px;
  line-height: 1.5;
}

/* Project identity */
.project-identity-panel {
  background: linear-gradient(180deg, rgba(91,143,249,0.08), transparent 100%), var(--bg2);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 40px;
  position: relative;
}
.project-identity-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.project-identity-header p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 46rem;
}
.project-identity-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: 12px;
}
.identity-item {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  min-height: 88px;
}
.identity-project,
.identity-members {
  grid-column: span 2;
}
.identity-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.identity-item strong {
  display: block;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--text);
}

/* Elevator pitch */
.elevator-pitch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}
.pitch-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  position: relative;
  transition: border-color var(--trans);
}
.pitch-card:hover { border-color: var(--accent); }
.pitch-card.gap { border-top: 3px solid var(--red); }
.pitch-card.solution { border-top: 3px solid var(--accent); }
.pitch-card.impact { border-top: 3px solid var(--green); }
.pitch-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-weight: 500;
}
.pitch-card p { font-size: 0.9rem; margin: 0; }

/* Quick nav */
.quick-nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.quick-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  text-decoration: none;
  transition: all var(--trans);
  min-width: 130px;
}
.quick-card:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
}
.qc-icon { font-size: 1.2rem; color: var(--accent); }
.qc-title { font-size: 0.9rem; font-weight: 700; color: var(--text); }
.qc-desc { font-size: 0.75rem; color: var(--text-muted); }

/* ── PROSE ───────────────────────────────────────── */
.prose-block { margin-bottom: 28px; }

/* Callout */
.callout-box {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin: 24px 0;
}
.callout-box.warning { border-left: 4px solid var(--amber); }
.callout-box.success { border-left: 4px solid var(--green); }
.callout-icon { font-size: 1.2rem; color: var(--amber); flex-shrink: 0; margin-top: 2px; }
.callout-box.success .callout-icon { color: var(--green); }
.callout-box p, .callout-box div { font-size: 0.9rem; color: var(--text-dim); line-height: 1.6; margin: 0; }

/* Two col */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.info-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.info-icon { font-size: 1.4rem; color: var(--accent); margin-bottom: 10px; }
.info-card p { font-size: 0.88rem; margin: 0; }

/* Stats */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.stat-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: center;
}
.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
}
.stat-desc { font-size: 0.78rem; color: var(--text-muted); line-height: 1.3; }

/* ── SMART OBJECTIVES ────────────────────────────── */
.main-objective {
  background: var(--bg2);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 32px;
  position: relative;
}
.obj-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  border-radius: 100px;
  padding: 3px 10px;
  margin-bottom: 12px;
}
.main-objective p { font-size: 1rem; margin: 0; }

.smart-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.smart-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: border-color var(--trans);
}
.smart-card:hover { border-color: var(--accent2); }
.smart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.smart-num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--border);
  letter-spacing: -0.05em;
}
.smart-badges { display: flex; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 100px;
  font-weight: 600;
}
.badge.s { background: rgba(91,143,249,0.15); color: var(--accent); }
.badge.m { background: rgba(167,139,250,0.15); color: var(--accent2); }
.badge.a { background: rgba(52,211,153,0.15); color: var(--green); }
.badge.r { background: rgba(251,191,36,0.15); color: var(--amber); }
.badge.t { background: rgba(248,113,113,0.15); color: var(--red); }
.smart-card h4 { margin-bottom: 8px; }
.smart-card p { font-size: 0.875rem; margin: 0 0 14px; }
.smart-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* ── METHODOLOGY ─────────────────────────────────── */
.subsection { margin-bottom: 48px; }

/* Architecture diagram */
.arch-diagram {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  overflow-x: auto;
  margin-top: 16px;
}
.arch-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 110px;
  text-align: center;
  flex-shrink: 0;
}
.arch-icon {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 1.2rem;
  border: 2px solid;
}
.arch-node.source .arch-icon { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }
.arch-node.process .arch-icon { border-color: var(--accent2); color: var(--accent2); background: rgba(167,139,250,0.1); }
.arch-node.decision .arch-icon { border-color: var(--amber); color: var(--amber); background: rgba(251,191,36,0.1); }
.arch-node.output .arch-icon { border-color: var(--green); color: var(--green); background: rgba(52,211,153,0.1); }
.arch-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.3;
  text-align: center;
}
.arch-label code { font-size: 0.68rem; }
.arch-arrow { color: var(--text-muted); font-size: 1.2rem; flex-shrink: 0; }

/* Tech grid */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 12px;
}
.tech-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.tech-name { font-weight: 700; font-size: 0.9rem; color: var(--text); }
.tech-role {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Module cards */
.module-list { display: flex; flex-direction: column; gap: 16px; margin-top: 12px; }
.module-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.module-file { font-size: 0.9rem; }
.module-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent);
}
.module-card p { font-size: 0.875rem; margin-bottom: 14px; }

/* Pipeline steps */
.pipeline-steps {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.pipe-step {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
}
.pipe-arrow { color: var(--text-muted); font-size: 0.8rem; }

/* Code block */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: auto;
}
.code-block pre {
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.7;
  margin: 0;
  white-space: pre;
}

/* Workflow */
.workflow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 12px;
}
.wf-step {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.wf-step:last-child { border-bottom: none; }
.wf-num {
  width: 32px; height: 32px;
  background: var(--accent-glow);
  border: 2px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}
.wf-content strong { display: block; margin-bottom: 4px; }
.wf-content p { font-size: 0.875rem; margin: 0; }

/* Table */
.table-wrapper { overflow-x: auto; margin-top: 12px; border-radius: 10px; border: 1px solid var(--border); }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.data-table th {
  background: var(--bg3);
  color: var(--text-muted);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--accent-glow); }
.total-row td { background: var(--bg3); }
.status-ok { color: var(--green); font-family: var(--font-mono); font-size: 0.8rem; }

/* Constraint grid */
.constraint-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.constraint-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
}
.constraint-card.safe { border-left: 3px solid var(--green); }
.constraint-card.warn { border-left: 3px solid var(--amber); }
.c-icon { font-size: 1rem; margin-bottom: 6px; display: block; }
.constraint-card.safe .c-icon { color: var(--green); }
.constraint-card.warn .c-icon { color: var(--amber); }
.constraint-card strong { display: block; margin-bottom: 4px; }
.constraint-card p { font-size: 0.83rem; margin: 0; }

/* ── TIMELINE / GANTT ────────────────────────────── */
.gantt-wrapper {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 32px;
  overflow-x: auto;
}
.gantt-header {
  display: flex;
  align-items: center;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  gap: 0;
}
.gantt-label-col {
  min-width: 180px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.gantt-weeks {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  min-width: 480px;
}
.gantt-weeks span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.05em;
}
.gantt-phase {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
}
.gantt-phase.research { background: rgba(79,142,247,0.05); border-left: 3px solid var(--phase-research); }
.gantt-phase.dev { background: rgba(167,139,250,0.05); border-left: 3px solid var(--phase-dev); }
.gantt-phase.test { background: rgba(52,211,153,0.05); border-left: 3px solid var(--phase-test); }
.gantt-phase.refine { background: rgba(251,146,60,0.05); border-left: 3px solid var(--phase-refine); }
.phase-name {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.gantt-row {
  display: flex;
  align-items: center;
  padding: 6px 16px;
  border-bottom: 1px solid var(--border);
}
.gantt-row:last-child { border-bottom: none; }
.gantt-label {
  min-width: 180px;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.gantt-bars {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  height: 28px;
  gap: 2px;
  min-width: 480px;
}
.bar {
  height: 20px;
  border-radius: 4px;
  opacity: 0.8;
  align-self: center;
}

/* Roadmap */
.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.roadmap-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
.roadmap-card.research { border-left: 4px solid var(--phase-research); }
.roadmap-card.dev { border-left: 4px solid var(--phase-dev); }
.roadmap-card.test { border-left: 4px solid var(--phase-test); }
.roadmap-card.refine { border-left: 4px solid var(--phase-refine); }
.roadmap-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}
.roadmap-step {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.roadmap-header h4 {
  margin-bottom: 0;
  font-size: 1.05rem;
}
.roadmap-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.roadmap-list li {
  position: relative;
  padding-left: 16px;
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
}
.roadmap-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ── RESOURCES ───────────────────────────────────── */
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 28px; }
.resource-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
.resource-card h4 { margin-bottom: 16px; }
.resource-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.resource-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.resource-list li:last-child { border-bottom: none; padding-bottom: 0; }
.res-name { color: var(--text-dim); }
.res-free { color: var(--green); font-family: var(--font-mono); font-size: 0.72rem; }
.res-cost { color: var(--amber); font-family: var(--font-mono); font-size: 0.72rem; }
.res-role { color: var(--accent); font-family: var(--font-mono); font-size: 0.72rem; }
.budget-table { margin-top: 0; }

/* ── RISKS ───────────────────────────────────────── */
.risk-grid { display: flex; flex-direction: column; gap: 16px; }
.risk-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
.risk-card.high { border-left: 4px solid var(--red); }
.risk-card.medium { border-left: 4px solid var(--amber); }
.risk-card.low { border-left: 4px solid var(--green); }
.risk-header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.risk-level {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border-radius: 100px;
  font-weight: 700;
}
.risk-card.high .risk-level { background: rgba(248,113,113,0.1); color: var(--red); }
.risk-card.medium .risk-level { background: rgba(251,191,36,0.1); color: var(--amber); }
.risk-card.low .risk-level { background: rgba(52,211,153,0.1); color: var(--green); }
.risk-desc { font-size: 0.875rem; margin-bottom: 14px; }
.risk-mitigation, .risk-fallback {
  font-size: 0.83rem;
  color: var(--text-dim);
  margin-bottom: 6px;
  padding: 8px 12px;
  border-radius: 6px;
  background: var(--bg3);
}
.risk-mitigation { border-left: 2px solid var(--accent); }
.risk-fallback { border-left: 2px solid var(--accent2); }

/* ── RESULTS ─────────────────────────────────────── */
.deliverables-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 40px; }
.deliverable-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color var(--trans);
}
.deliverable-card:hover { border-color: var(--accent); }
.del-icon { font-size: 1.4rem; color: var(--accent); }
.deliverable-card p { font-size: 0.85rem; margin: 0; flex: 1; }
.del-status {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 100px;
  align-self: flex-start;
}
.del-status.done { background: rgba(52,211,153,0.1); color: var(--green); }
.del-status.pending { background: rgba(251,191,36,0.1); color: var(--amber); }

/* ── FOOTER ──────────────────────────────────────── */
.site-footer {
  background: var(--sidebar-bg);
  border-top: 1px solid var(--border);
  padding: 48px clamp(32px, 4vw, 80px) 24px;
}
.footer-inner {
  display: flex;
  gap: 48px;
  align-items: flex-start;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.footer-brand {
  font-size: 1.1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-meta p { font-size: 0.83rem; color: var(--text-muted); margin-bottom: 4px; }
.footer-links { display: flex; gap: 20px; margin-left: auto; }
.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--trans);
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  letter-spacing: 0.03em;
}

/* ── RESPONSIVE ──────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .hamburger { display: flex; }
  .overlay.open { display: block; }
  .main-content { margin-left: 0; }
  .main-content { width: 100%; }
  .section { padding: 60px 24px; }
  .elevator-pitch { grid-template-columns: 1fr; }
  .two-col, .stat-row, .smart-grid, .constraint-grid,
  .resource-grid, .deliverables-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .site-footer { padding: 40px 24px 20px; }
  .footer-inner { flex-direction: column; gap: 24px; }
  .footer-links { margin-left: 0; }
  .project-identity-grid { grid-template-columns: 1fr 1fr; }
  .identity-project, .identity-members { grid-column: span 2; }
}

@media (max-width: 540px) {
  .hero-title { font-size: 2.6rem; }
  .section-title { font-size: 1.7rem; }
  .quick-nav { flex-direction: column; }
  .tech-grid { grid-template-columns: 1fr; }
  .project-identity-grid { grid-template-columns: 1fr; }
  .identity-project, .identity-members { grid-column: span 1; }
}

/* ── ANIMATIONS ──────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-title, .hero-subtitle, .project-identity-panel, .elevator-pitch, .quick-nav {
  animation: fadeUp 0.5s ease forwards;
}
.hero-title { animation-delay: 0.05s; opacity: 0; }
.hero-subtitle { animation-delay: 0.1s; opacity: 0; }
.project-identity-panel { animation-delay: 0.15s; opacity: 0; }
.elevator-pitch { animation-delay: 0.2s; opacity: 0; }
.quick-nav { animation-delay: 0.25s; opacity: 0; }