/* ============================================
   Gestion Immo Patrimoine — stylesheet
   Design system : sombre, sobre, premium
   ============================================ */

:root {
  --bg: #0a0f1c;
  --bg-elev: #0f172a;
  --bg-card: #131c2f;
  --border: #1e293b;
  --border-soft: #1a2236;
  --fg: #f1f5f9;
  --fg-dim: #94a3b8;
  --fg-soft: #64748b;
  --accent: #3b82f6;
  --accent-2: #8b5cf6;
  --warning: #fbbf24;
  --success: #10b981;
  --danger: #ef4444;
  --cyan: #22d3ee;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }

/* ===== TOPBAR ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: rgba(10, 15, 28, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.topnav {
  display: flex;
  gap: 1.8rem;
  font-size: 0.85rem;
  color: var(--fg-dim);
}

.topnav a {
  transition: color 0.2s;
  font-weight: 500;
}

.topnav a:hover { color: var(--fg); }

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.12);
  color: var(--warning);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-live .dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--warning);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.25);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

/* ===== HERO ===== */
.hero {
  padding: 5rem 1.5rem 4rem;
  background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.08), transparent 50%),
              radial-gradient(ellipse at bottom right, rgba(139, 92, 246, 0.06), transparent 40%);
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1.5rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 1.25rem 0;
  line-height: 1.1;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-size: 1.1rem;
  color: var(--fg-dim);
  max-width: 720px;
  margin: 0 auto 3rem;
  line-height: 1.6;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  max-width: 760px;
  margin: 0 auto;
}

.stat {
  padding: 1.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  transition: transform 0.2s, border-color 0.2s;
}

.stat:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.stat-value {
  font-size: 2.3rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* ===== SECTIONS ===== */
.section {
  padding: 5rem 1.5rem;
  max-width: 1280px;
  margin: 0 auto;
}

.section-head {
  margin-bottom: 3rem;
  position: relative;
}

.section-head .num {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 0.6rem;
  display: inline-block;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem 0;
}

.section-head p {
  color: var(--fg-dim);
  font-size: 1.05rem;
  margin: 0;
}

/* ===== GRIDS ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.25rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

/* ===== CARDS ===== */
.card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: var(--border);
  transform: translateY(-2px);
}

.card.check {
  border-left: 3px solid var(--success);
}

.card-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.6rem 0;
  letter-spacing: -0.01em;
}

.card p {
  color: var(--fg-dim);
  margin: 0 0 1rem 0;
  font-size: 0.95rem;
}

.bullets {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bullets li {
  position: relative;
  padding-left: 1.4rem;
  margin: 0.5rem 0;
  color: var(--fg-dim);
  font-size: 0.9rem;
}

.bullets li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.card.check .bullets li::before {
  content: "✓";
  color: var(--success);
}

/* ===== DIAGRAM ===== */
.diagram-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
  overflow: hidden;
}

.diagram-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.diagram-scroll svg {
  display: block;
  min-width: 1300px;
  height: auto;
}

.diagram-caption {
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin: 1.25rem 0 0 0;
  text-align: center;
}

/* ===== ARCHI FLOW ===== */
.archi-flow {
  display: flex;
  align-items: stretch;
  gap: 0.75rem;
  overflow-x: auto;
  padding: 1.5rem 0;
  -webkit-overflow-scrolling: touch;
}

.archi-flow .node {
  flex: 1 0 160px;
  padding: 1.25rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  text-align: center;
}

.archi-flow .node.accent {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(59, 130, 246, 0.04));
}

.archi-flow .node-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
}

.archi-flow .node-sub {
  font-size: 0.75rem;
  color: var(--fg-dim);
}

.archi-flow .arrow {
  display: flex;
  align-items: center;
  color: var(--fg-soft);
  font-size: 1.3rem;
  flex: 0 0 auto;
}

.tile {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  overflow: hidden;
}

.tile-header {
  padding: 0.8rem 1.2rem;
  background: rgba(59, 130, 246, 0.08);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
}

.tile-body {
  padding: 1.2rem;
  color: var(--fg-dim);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* ===== TIMELINE ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.95rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--border);
}

.phase {
  position: relative;
  padding: 1rem 0 1.5rem 2rem;
}

.phase-mark {
  position: absolute;
  left: -1.45rem;
  top: 1.2rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 2px solid var(--border);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--fg-dim);
}

.phase.done .phase-mark {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.phase.active .phase-mark {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  animation: pulse 2s infinite;
}

.phase-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  padding: 1.25rem 1.5rem;
}

.phase.active .phase-content {
  border-color: var(--accent);
}

.phase-meta {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}

.phase.done .phase-meta {
  color: var(--success);
}

.phase h4 {
  margin: 0 0 0.4rem 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.phase p {
  margin: 0;
  color: var(--fg-dim);
  font-size: 0.92rem;
}

/* ===== FOOTER ===== */
.footer {
  padding: 3rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  color: var(--fg-soft);
  font-size: 0.85rem;
}

.footer-sub {
  margin-top: 0.3rem;
}

.footer-sub a {
  color: var(--accent);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .topnav { display: none; }
  .badge-live { display: none; }
  .topbar { padding: 0.75rem 1rem; }
  .hero { padding: 3rem 1rem 2.5rem; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 3rem 1rem; }
}