/* ============================================================
   Layou Architecture Viz — styles
   Dark theme, neon-ish accents, smooth motion.
   ============================================================ */

/* ============================================================
   Tokens alignés sur la landing youcefelkamel — « Builder Créatif »
   Deep Blue Night base + Amber Gold accent + Space Grotesk display
   ============================================================ */

:root {
  /* Foundations — Deep Blue Night */
  --bg:            #0A0F1E;   /* deepest */
  --bg-2:          #0F172A;   /* main bg */
  --surface:       #1E293B;   /* cards */
  --surface-2:     #243049;
  --border:        #334155;   /* subtle dividers */
  --border-strong: #475569;

  /* Text Hierarchy */
  --text:       #F8FAFC;   /* primary (off-white) */
  --text-hero:  #FFFFFF;   /* hero only */
  --text-muted: #94A3B8;   /* descriptions */
  --text-faint: #64748B;   /* metadata */
  --text-accent: #FEF3C7;  /* tags */

  /* Package colors — anchored on amber brand */
  --app:          #F8FAFC;   /* clean orchestrator */
  --presentation: #A78BFA;   /* soft lavender — UI layer */
  --domain:       #FBBF24;   /* AMBER HERO — the heart, brand-aligned */
  --data:         #3B82F6;   /* info blue — technical */
  --core:         #94A3B8;   /* slate — neutral foundation */

  /* Functional */
  --accent: #10B981;   /* success */
  --warn:   #F59E0B;   /* amber-creative */
  --danger: #EF4444;

  /* Signature glow */
  --shadow-amber-glow:        0 0 20px rgb(251 191 36 / 0.30);
  --shadow-amber-glow-strong: 0 0 30px rgb(251 191 36 / 0.50);
  --shadow-amber-glow-hero:   0 0 40px rgb(251 191 36 / 0.40);
  --shadow-soft: 0 12px 40px rgba(0, 0, 0, 0.45);

  --radius-sm: 6px;
  --radius:    12px;
  --radius-lg: 18px;

  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:    'JetBrains Mono', "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Ambient amber+blue mood — landing-aligned */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 18% 12%, rgba(251, 191, 36, 0.10), transparent 42%),
    radial-gradient(circle at 82% 88%, rgba(59, 130, 246, 0.08), transparent 48%),
    radial-gradient(circle at 50% 50%, rgba(251, 191, 36, 0.04), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   Menu / view screens — toggle visibility with .hidden
   ============================================================ */

.menu-screen,
.view-screen {
  position: fixed;
  inset: 0;
  z-index: 1;
  transition: opacity 0.32s ease, transform 0.32s ease;
}

.menu-screen.hidden,
.view-screen.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}

/* ============================================================
   MENU — landing with 8 cards
   ============================================================ */

.menu-screen {
  overflow-y: auto;
  display: flex;
  align-items: stretch;
  justify-content: center;
}

.menu-content {
  width: 100%;
  max-width: 1320px;
  padding: 56px 32px 48px;
  display: flex;
  flex-direction: column;
  gap: 44px;
}

.menu-header {
  display: flex;
  align-items: center;
  gap: 20px;
}

.menu-text {
  flex: 1;
}

.menu-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-hero);
  margin: 0;
  line-height: 1.1;
}

.menu-subtitle {
  font-size: 15px;
  color: var(--text-muted);
  margin: 6px 0 0 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--domain), var(--warn));
  position: relative;
  box-shadow: var(--shadow-amber-glow-strong);
  flex-shrink: 0;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.brand-mark:hover {
  transform: scale(1.05);
  box-shadow: 0 0 24px rgba(245, 158, 11, 0.7);
}
.brand-mark-logo {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: block;
}

/* ============================================================
   Menu grid — 4 columns of cards
   ============================================================ */

.menu-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.menu-card {
  position: relative;
  background: rgba(30, 41, 59, 0.65);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 22px 22px;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  color: var(--text);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 170px;
  overflow: hidden;
}

.menu-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--card-accent, var(--domain));
  opacity: 0.55;
  transition: opacity 0.22s ease, width 0.22s ease;
}

.menu-card:hover {
  transform: translateY(-3px);
  border-color: var(--card-accent, var(--domain));
  background: rgba(30, 41, 59, 0.85);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5),
              0 0 22px color-mix(in srgb, var(--card-accent, var(--domain)) 25%, transparent);
}

.menu-card:hover::before {
  opacity: 1;
  width: 5px;
}

.menu-card-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--card-accent, var(--text-faint));
  font-weight: 600;
}

.menu-card-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-hero);
  line-height: 1.2;
}

.menu-card-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}

.menu-card-arrow {
  align-self: flex-end;
  font-size: 18px;
  color: var(--card-accent, var(--text-faint));
  opacity: 0.6;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.menu-card:hover .menu-card-arrow {
  opacity: 1;
  transform: translateX(3px);
}

.menu-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding-top: 8px;
  font-size: 12px;
  color: var(--text-faint);
  font-family: var(--font-mono);
}
.menu-footer kbd {
  display: inline-block;
  padding: 1px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 10.5px;
  color: var(--text-muted);
}

/* ============================================================
   Tour button (now lives in menu header)
   ============================================================ */

.btn-tour {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 18px;
  background: linear-gradient(135deg, rgba(251, 191, 36, 0.14), rgba(245, 158, 11, 0.20));
  color: var(--domain);
  border: 1px solid rgba(251, 191, 36, 0.45);
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.btn-tour:hover {
  background: linear-gradient(135deg, rgba(251, 191, 36, 0.22), rgba(245, 158, 11, 0.30));
  transform: translateY(-1px);
  box-shadow: var(--shadow-amber-glow);
}
.btn-tour.playing {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.20), rgba(245, 158, 11, 0.20));
  color: var(--warn);
  border-color: rgba(245, 158, 11, 0.50);
}
.btn-tour-icon {
  font-size: 10px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: currentColor;
  color: var(--bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================
   Back button — floating overlay in view mode
   ============================================================ */

.back-btn {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px 10px 14px;
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.92), rgba(15, 23, 42, 0.92));
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--text-hero);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.back-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(251, 191, 36, 0.6);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.98), rgba(245, 158, 11, 0.18));
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), var(--shadow-amber-glow);
}

.back-arrow {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--domain);
  color: var(--bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  transition: transform 0.18s ease;
}
.back-btn:hover .back-arrow {
  transform: translateX(-2px);
}

/* ============================================================
   Body layout
   ============================================================ */

.view-screen {
  display: flex;
  flex-direction: column;
}

.body {
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  height: 100vh;
  scroll-behavior: smooth;
}

.canvas {
  position: relative;
  flex: 0 0 auto;
  /* full viewport (no header now — back button overlays in top-left) */
  min-height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 32px;
  transition: opacity 0.32s ease, transform 0.32s ease;
}

.canvas svg {
  width: 100%;
  height: 100%;
  max-width: 1600px;
  max-height: 100%;
}

/* fade-in on view change */
.canvas.fading { opacity: 0; transform: translateY(8px); }

/* ============================================================
   Side panel
   ============================================================ */

.panel {
  flex: 0 0 auto;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.55), rgba(7, 9, 15, 0.4));
  padding: 36px 48px 64px;
  display: grid;
  grid-template-columns: minmax(280px, 360px) 1fr;
  gap: 32px 48px;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  align-items: start;
}

.panel-header {
  grid-column: 1;
  grid-row: 1;
}

.panel-content {
  grid-column: 2;
  grid-row: 1 / span 2;
}

.panel-footer {
  grid-column: 1;
  grid-row: 2;
  align-self: end;
}

.panel-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-faint);
}

.panel-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  margin: 4px 0 0 0;
  letter-spacing: -0.025em;
  color: var(--text-hero);
}

.panel-content {
  flex: 1;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-muted);
}

.panel-content p { margin: 0 0 12px 0; }
.panel-content strong { color: var(--text); font-weight: 600; }
.panel-content code {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 2px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--accent);
}

.panel-content .legend {
  display: grid;
  gap: 8px;
  margin: 12px 0 16px 0;
}
.panel-content .legend-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
}
.panel-content .legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.panel-content .rules { margin: 8px 0 0 0; padding: 0; list-style: none; }
.panel-content .rules li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 0;
  font-size: 12.5px;
  border-bottom: 1px dashed var(--border);
}
.panel-content .rules li:last-child { border-bottom: none; }
.panel-content .rules .icon-ok { color: var(--accent); flex-shrink: 0; }
.panel-content .rules .icon-no { color: var(--danger); flex-shrink: 0; }

.panel-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 11.5px;
  color: var(--text-faint);
  font-family: var(--font-mono);
}
.footer-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

/* ============================================================
   SVG helpers
   ============================================================ */

.node-card {
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease;
  transform-box: fill-box;
  transform-origin: center;
}
.node-card:hover { filter: brightness(1.15); }
.node-card.highlight rect { stroke-width: 2.5; }
.node-card.dimmed { opacity: 0.35; }

.edge {
  fill: none;
  stroke: var(--border-strong);
  stroke-width: 1.6;
  transition: stroke 0.3s ease, stroke-width 0.3s ease;
}
.edge.allowed { stroke: rgba(52, 211, 153, 0.55); }
.edge.forbidden {
  stroke: rgba(239, 68, 68, 0.55);
  stroke-dasharray: 6 4;
}
.edge.flow {
  stroke: rgba(167, 139, 250, 0.6);
  stroke-width: 2;
}
.edge.dimmed { opacity: 0.18; }
.edge.active { stroke-width: 2.5; opacity: 1; }

.label-text {
  fill: var(--text);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  pointer-events: none;
}
.label-sub {
  fill: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  pointer-events: none;
}
.label-mini {
  fill: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 10px;
  pointer-events: none;
}

.title-text {
  fill: var(--text-hero);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  pointer-events: none;
}

.section-bg {
  fill: rgba(19, 26, 44, 0.5);
  stroke: var(--border);
  stroke-width: 1;
  rx: 14;
  ry: 14;
}

/* Pulsing node (Domain — the amber heart, brand-aligned) */
@keyframes pulse-domain {
  0%, 100% {
    filter: drop-shadow(0 0 4px rgba(251, 191, 36, 0.15));
  }
  50% {
    filter: drop-shadow(0 0 22px rgba(251, 191, 36, 0.65));
  }
}

.node-domain rect {
  animation: pulse-domain 3s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

@keyframes ring-expand {
  0% { r: 6; opacity: 0.8; }
  100% { r: 30; opacity: 0; }
}

.ping-ring {
  fill: none;
  stroke-width: 2;
  animation: ring-expand 1.4s ease-out infinite;
}

/* Glowing node when active */
.node-card.active rect {
  filter: drop-shadow(0 0 14px currentColor);
}

/* Forbidden marker */
.forbidden-x {
  fill: var(--danger);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 14px;
  pointer-events: none;
}

/* Action buttons within canvas (e.g., trigger flow) */
.canvas-action {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  background: linear-gradient(135deg, var(--domain), var(--warn));
  color: var(--bg);
  border: none;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: var(--shadow-amber-glow-strong);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  z-index: 4;
}
.canvas-action:hover {
  transform: translateX(-50%) translateY(-2px);
  box-shadow: var(--shadow-amber-glow-hero);
}
.canvas-action:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: translateX(-50%);
}

.canvas-loop-toggle {
  position: absolute;
  bottom: 24px;
  right: 28px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
  z-index: 4;
}
.canvas-loop-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.canvas-loop-toggle.on { color: var(--accent); border-color: rgba(52, 211, 153, 0.45); }

/* Step list inside flow view */
.flow-step.active rect {
  stroke-width: 2.5;
  filter: drop-shadow(0 0 14px currentColor);
}
.flow-step rect {
  transition: stroke-width 0.18s ease, filter 0.18s ease;
}

@media (max-width: 1100px) {
  .menu-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 1500px) and (min-width: 1101px) {
  .menu-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 880px) {
  .menu-content { padding: 32px 20px; gap: 28px; }
  .menu-title { font-size: 24px; }
  .menu-grid { grid-template-columns: 1fr; gap: 12px; }
  .menu-header { flex-wrap: wrap; }
  .panel {
    grid-template-columns: 1fr;
    padding: 24px 20px 48px;
    gap: 16px;
  }
  .panel-header,
  .panel-content,
  .panel-footer {
    grid-column: 1;
    grid-row: auto;
  }
  .canvas {
    min-height: 100vh;
    padding: 60px 16px 16px;
  }
  .back-btn { top: 12px; left: 12px; padding: 8px 14px 8px 10px; }
  .back-label { display: none; }
}