:root {
  --bg: #071019;
  --surface: rgba(10, 24, 36, 0.78);
  --surface-strong: rgba(13, 30, 45, 0.92);
  --panel: rgba(16, 35, 52, 0.84);
  --border: rgba(129, 170, 199, 0.16);
  --text: #eff8ff;
  --muted: #8fb0c5;
  --accent: #ff9d4d;
  --accent-2: #ffd166;
  --green: #4ade80;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 157, 77, 0.18), transparent 24%),
    radial-gradient(circle at 80% 0%, rgba(83, 176, 255, 0.18), transparent 22%),
    linear-gradient(180deg, #071019 0%, #091520 45%, #061018 100%);
}

a {
  color: inherit;
}

code,
pre {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.85em;
}

pre {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  overflow-x: auto;
  margin: 8px 0 0;
}

/* ── Topbar ── */

.topbar,
.hero,
.viewer-shell,
.sidebar,
.source-header,
.source-card {
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 18px 24px;
  background: rgba(7, 16, 25, 0.86);
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  margin: 0;
  font-size: clamp(1.6rem, 2vw, 2.2rem);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
}

/* ── Tabs ── */

.tab-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  padding: 7px 18px;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.tab-link {
  text-decoration: none;
}

.tab:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.tab.active {
  background: rgba(255, 157, 77, 0.18);
  border-color: rgba(255, 157, 77, 0.5);
  color: var(--accent);
}

/* ── Main layout ── */

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 24px 48px;
}

.panel-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 20px;
  align-items: start;
}

@media (max-width: 900px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Viewer shell ── */

.viewer-shell {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow);
}

/* ── Upload zone ── */

.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 280px;
  border: 2px dashed var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  padding: 40px 20px;
  text-align: center;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(255, 157, 77, 0.06);
}

.upload-icon {
  font-size: 2.8rem;
  color: var(--accent);
  line-height: 1;
}

.upload-hint {
  margin: 0;
  font-size: 1rem;
  color: var(--text);
}

.upload-link {
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
}

.upload-sub {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ── Canvas area ── */

.canvas-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 700px) {
  .canvas-row {
    grid-template-columns: 1fr;
  }
}

.canvas-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.canvas-label {
  margin: 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.canvas-card canvas {
  width: 100%;
  height: auto;
  border-radius: 6px;
  display: block;
  background: #000;
}

.canvas-wrapper {
  position: relative;
}

.canvas-wrapper canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  background: #000;
}

.processing-overlay {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(7, 16, 25, 0.72);
  border-radius: 6px;
}

.processing-overlay.actif {
  display: flex;
}

.processing-overlay p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--accent);
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Actions bar ── */

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

button {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  padding: 8px 20px;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.24);
}

button:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

button.ghost-btn {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
}

button.ghost-btn:hover:not(:disabled) {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.2);
}

button.accent-btn {
  background: rgba(255, 157, 77, 0.22);
  border-color: rgba(255, 157, 77, 0.55);
  color: var(--accent);
}

button.accent-btn:hover:not(:disabled) {
  background: rgba(255, 157, 77, 0.34);
}

/* ── Sidebar ── */

.sidebar {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow);
}

.ctrl-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.select-wrap {
  display: block;
}

.select-wrap select {
  width: 100%;
  background: rgba(0, 0, 0, 0.24);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 10px 12px;
}

.ctrl-title {
  margin: 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.ctrl-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ctrl-row label.muted {
  font-size: 0.82rem;
}

.value-badge {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--accent-2);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  min-width: 30px;
  padding: 2px 6px;
  text-align: center;
}

.muted {
  color: var(--muted);
  font-size: 0.82rem;
}

input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  min-width: 60px;
}

input[type="color"] {
  width: 32px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  padding: 1px;
  background: transparent;
}

/* ── Pill group (radio buttons) ── */

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill-group label {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  padding: 4px 12px;
  transition: background 0.15s, border-color 0.15s;
}

.pill-group label:hover {
  background: rgba(255, 255, 255, 0.06);
}

.pill-group input[type="radio"] {
  accent-color: var(--accent);
}

/* ── Checkbox row ── */

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--muted);
}

.checkbox-row input[type="checkbox"] {
  accent-color: var(--accent);
}

/* ── Source panel ── */

.source-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.source-header {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.source-header h2 {
  margin: 0 0 8px;
}

.source-header p {
  margin: 0 0 10px;
  color: var(--muted);
  line-height: 1.6;
}

.source-header p:last-child {
  margin-bottom: 0;
}

.source-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.source-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.source-group-title {
  margin: 0;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.source-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}

.source-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
}

.source-card h4 {
  margin: 0 0 6px;
  font-size: 0.92rem;
}

.source-card p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.55;
}

.source-card-export {
  border-left: 3px solid rgba(255, 157, 77, 0.45);
}

.source-card-code {
  border-left: 3px solid rgba(83, 176, 255, 0.45);
}

.filename-pill {
  background: rgba(255, 157, 77, 0.15);
  border: 1px solid rgba(255, 157, 77, 0.3);
  border-radius: 4px;
  color: var(--accent);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  padding: 2px 8px;
}

/* ── Hero / footer status ── */

.hero {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-top: 24px;
  padding: 20px 24px;
  line-height: 1.65;
}

.hero p {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.85rem;
}

.hero-note {
  color: var(--muted) !important;
  font-size: 0.78rem !important;
  font-family: "IBM Plex Mono", monospace;
}

#wasm-status {
  margin-top: 4px;
}