:root {
  --bg: #0b0f14;
  --card: #121822;
  --text: #e5ecf4;
  --muted: #a8b3c2;
  --accent: #7cc4ff;
  --ok: #7ce2a0;
  --warn: #ffd37c;
  --err: #ff9aa2;
  --border: #1f2a3b;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.site-header, .site-footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
}

/* Hero tip keeps the preparation reminder visible without overpowering the headline. */
.site-tip {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 68ch;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
}

.feature-stack {
  display: grid;
  gap: 32px;
}

.feature-section {
  display: block;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.2);
}

.grid {
  display: grid;
  gap: 16px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.dropzone {
  border: 2px dashed var(--accent);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.dropzone.dragover {
  background: rgba(124, 196, 255, 0.08);
  border-color: #b7e2ff;
}

input[type="file"] {
  display: block;
  margin-top: 12px;
}

.kv {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 8px 16px;
  align-items: baseline;
}

.kv-list {
  display: grid;
  gap: 12px;
}

/* Video Prep: stack the layout dropdown on its own line for easier scanning. */
.video-prep-field {
  display: grid;
  gap: 8px;
  max-width: 260px;
}

.video-prep-field__label {
  display: block;
}

.video-prep-field__select {
  width: 100%;
}

.status-ok { color: var(--ok); }
.status-warn { color: var(--warn); }
.status-err { color: var(--err); }

button {
  background: var(--accent);
  color: #07111b;
  border: none;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}
button[disabled] { opacity: .5; cursor: not-allowed; }

/* Tab layout keeps uploads, prep, and generation organized. */
.tabbed-layout {
  display: grid;
  gap: 24px;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tab-button {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 18px;
  display: grid;
  gap: 4px;
  text-align: left;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.tab-button[aria-selected="true"] {
  background: var(--accent);
  color: #07111b;
  border-color: var(--accent);
}

.tab-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.tab-subtitle {
  font-size: 0.8rem;
  color: var(--muted);
}

.tab-button[aria-selected="true"] .tab-subtitle {
  color: #052540;
}

.tab-panels {
  display: block;
}

.tab-panel[hidden] {
  display: none;
}

.video-generation-actions {
  margin-top: 24px;
}

.video-export {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.video-export-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 12px 0 4px;
}

.video-export-progress {
  display: grid;
  gap: 6px;
}

.video-export-button {
  justify-self: start;
}

.video-export progress {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
}

.xml-sync {
  display: grid;
  gap: 16px;
}

.xml-sync-status {
  margin: 0;
  color: var(--muted);
}

.xml-sync-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.xml-sync-board {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.xml-sync-slide,
.xml-sync-unassigned {
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 12px;
  background: rgba(124, 196, 255, 0.04);
}

.xml-sync-slide h4,
.xml-sync-unassigned h4 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1rem;
}

.xml-sync-page-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 40px;
}

.xml-sync-chip {
  background: rgba(124, 196, 255, 0.2);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 9999px;
  cursor: grab;
  user-select: none;
  font-size: 0.9rem;
}

.xml-sync-chip:active {
  cursor: grabbing;
}

.xml-sync-empty {
  color: var(--muted);
  font-size: 0.85rem;
  user-select: none;
}

[data-dropzone].is-drop-target {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}