/* CBT Media Platform — Windows 11 Fluent Design (Light) */
:root {
  --accent: #0078D4;
  --accent-hover: #106EBE;
  --accent-pressed: #005A9E;
  --accent-soft: rgba(0, 120, 212, 0.12);
  --bg: #f3f3f3;
  --bg-alt: #fafafa;
  --surface: #ffffff;
  --surface-secondary: #f9f9f9;
  --mica: rgba(255, 255, 255, 0.72);
  --acrylic: rgba(252, 252, 252, 0.85);
  --text: #1a1a1a;
  --text-secondary: #5d5d5d;
  --text-tertiary: #8a8a8a;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.14);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --sidebar-w: 260px;
  --topbar-h: 52px;
  --font: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Code", "Consolas", ui-monospace, monospace;
  --ease: cubic-bezier(0.33, 1, 0.68, 1);
  --danger: #c42b1c;
  --success: #0f7b0f;
  --warning: #9d5d00;
}

*, *::before, *::after { box-sizing: border-box; }
html { height: 100%; }
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img, video { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0 0 .5rem; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.2rem; }
p { margin: 0 0 .75rem; }
code { font-family: var(--mono); font-size: .9em; background: var(--bg); padding: .1rem .35rem; border-radius: 4px; }

/* Layout shell */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--acrylic);
  backdrop-filter: blur(30px) saturate(1.4);
  -webkit-backdrop-filter: blur(30px) saturate(1.4);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 20;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--border);
  min-height: var(--topbar-h);
}
.brand-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, #0078D4, #5B2C6F);
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: .85rem;
  box-shadow: var(--shadow-sm);
}
.brand-text { font-weight: 600; font-size: .95rem; line-height: 1.2; }
.brand-sub { font-size: .72rem; color: var(--text-tertiary); font-weight: 400; }
.nav-list { list-style: none; margin: .75rem 0; padding: 0 .6rem; flex: 1; overflow: auto; }
.nav-list a {
  display: flex; align-items: center; gap: .65rem;
  padding: .55rem .75rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  transition: background .15s var(--ease), color .15s var(--ease);
}
.nav-list a:hover { background: rgba(0,0,0,.04); text-decoration: none; }
.nav-list a.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}
.nav-icon { width: 18px; height: 18px; opacity: .85; flex-shrink: 0; }
.sidebar-footer {
  padding: .85rem 1rem;
  border-top: 1px solid var(--border);
  font-size: .8rem;
  color: var(--text-secondary);
}
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar {
  height: var(--topbar-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.5rem;
  background: var(--mica);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.topbar h1 { font-size: 1rem; font-weight: 600; margin: 0; }
.content { padding: 1.25rem 1.5rem 2.5rem; flex: 1; }

/* Cards / surfaces */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 1.15rem 1.25rem;
}
.card-hover { transition: box-shadow .2s var(--ease), transform .2s var(--ease); }
.card-hover:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.surface-muted { background: var(--surface-secondary); }

.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .sidebar { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .content { padding: 1rem; }
}

/* Stat tiles */
.stat {
  display: flex; flex-direction: column; gap: .25rem;
}
.stat-value { font-size: 1.75rem; font-weight: 600; letter-spacing: -0.02em; }
.stat-label { color: var(--text-secondary); font-size: .85rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: .45rem .9rem;
  font-weight: 500;
  cursor: pointer;
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
  transition: background .15s var(--ease), border-color .15s var(--ease), box-shadow .15s var(--ease), transform .1s var(--ease);
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { background: var(--bg); text-decoration: none; }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(1.05); color: #fff; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover { background: rgba(0,0,0,.05); }
.btn-sm { padding: .3rem .65rem; font-size: .85rem; }
.btn-lg { padding: .65rem 1.2rem; font-size: .95rem; }
.btn-block { width: 100%; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 500;
  margin-bottom: .35rem;
  color: var(--text-secondary);
}
.form-control, .form-select, textarea.form-control {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: .5rem .7rem;
  background: var(--surface);
  outline: none;
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.form-control:focus, .form-select:focus, textarea.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}
textarea.form-control { min-height: 100px; resize: vertical; }
.form-hint { font-size: .8rem; color: var(--text-tertiary); margin-top: .3rem; }
.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row > * { flex: 1; min-width: 180px; }
.form-check { display: flex; align-items: center; gap: .5rem; margin: .4rem 0; }
.form-check input { width: 16px; height: 16px; accent-color: var(--accent); }

/* Tables */
.table-wrap { overflow: auto; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
table.data {
  width: 100%;
  border-collapse: collapse;
}
table.data th, table.data td {
  text-align: left;
  padding: .7rem .9rem;
  border-bottom: 1px solid var(--border);
}
table.data th {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--text-secondary);
  background: var(--surface-secondary);
  font-weight: 600;
}
table.data tr:last-child td { border-bottom: 0; }
table.data tr:hover td { background: rgba(0,0,0,.015); }

/* Badges */
.badge {
  display: inline-flex; align-items: center;
  padding: .15rem .5rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.badge-draft { background: #f3f3f3; color: #5d5d5d; }
.badge-published { background: #dff6dd; color: #0f7b0f; border-color: #9fd89f; }
.badge-archived { background: #fde7e9; color: #c42b1c; border-color: #f1aeb5; }
.badge-admin { background: var(--accent-soft); color: var(--accent); border-color: transparent; }

/* Alerts */
.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  animation: slideIn .25s var(--ease);
}
.alert-success { background: #dff6dd; border-color: #9fd89f; color: #0f7b0f; }
.alert-error { background: #fde7e9; border-color: #f1aeb5; color: #c42b1c; }
.alert-info { background: #e8f3ff; border-color: #9ec5ef; color: #005a9e; }
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* Toolbar */
.toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: .75rem; flex-wrap: wrap; margin-bottom: 1rem;
}
.toolbar-left, .toolbar-right { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.search-input { min-width: 220px; }

/* Guest / login */
.guest-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(0,120,212,.12), transparent 55%),
    radial-gradient(900px 500px at 100% 100%, rgba(91,44,111,.10), transparent 50%),
    var(--bg);
  padding: 1.5rem;
}
.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--acrylic);
  backdrop-filter: blur(40px) saturate(1.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 2rem 1.75rem;
}
.login-card .brand-row {
  display: flex; align-items: center; gap: .75rem; margin-bottom: 1.5rem;
}
.login-card h1 { font-size: 1.35rem; margin-bottom: .25rem; }
.login-card .subtitle { color: var(--text-secondary); margin-bottom: 1.5rem; }

/* Media grid */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: .85rem;
}
.media-tile {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s var(--ease), transform .2s var(--ease);
}
.media-tile:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.media-thumb {
  aspect-ratio: 1;
  background: var(--bg);
  display: grid; place-items: center;
  overflow: hidden;
}
.media-thumb img { width: 100%; height: 100%; object-fit: cover; }
.media-meta { padding: .55rem .65rem; font-size: .78rem; }
.media-meta .name {
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 500;
}

/* Empty state */
.empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}
.empty-title { font-size: 1.05rem; font-weight: 600; color: var(--text); margin-bottom: .35rem; }

/* Page sections */
.section-title {
  display: flex; align-items: center; justify-content: space-between;
  margin: 1.5rem 0 .75rem;
}
.muted { color: var(--text-secondary); }
.mono { font-family: var(--mono); font-size: .85em; }
.stack { display: flex; flex-direction: column; gap: .75rem; }
.row { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.divider { height: 1px; background: var(--border); margin: 1rem 0; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

/* Canvas layout */
.canvas-shell {
  display: grid;
  grid-template-columns: 220px 1fr 280px;
  grid-template-rows: 48px 1fr;
  height: 100vh;
  background: var(--bg);
}
.canvas-top {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: .75rem;
  padding: 0 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  z-index: 5;
}
.canvas-side, .canvas-props {
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow: auto;
  padding: .75rem;
}
.canvas-props { border-right: 0; border-left: 1px solid var(--border); }
.canvas-stage {
  overflow: auto;
  padding: 1.25rem;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}
.design-canvas {
  width: min(100%, 960px);
  aspect-ratio: 16 / 10;
  background-color: var(--surface);
  background-image:
    linear-gradient(to right, rgba(0,0,0,.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,.03) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%, 100% calc(100% / 8);
  background-position: 0 0, 0 0;
  background-repeat: repeat, repeat;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  display: grid;
  position: relative;
  user-select: none;
  touch-action: none;
}
/* When a slide has a PPTX/imported background image, drop the grid overlay look */
.design-canvas.has-background {
  background-color: #1a1a1a;
  /* background-image / size / position set by JS for the photo */
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.06), var(--shadow-md);
}
.design-canvas.has-background .canvas-el.is-text .el-text {
  text-shadow: 0 1px 2px rgba(0,0,0,.35);
}
.canvas-el.is-text .el-text {
  /* slight frosted plate so text stays readable on busy backgrounds */
  background: rgba(255,255,255,.78);
  border-radius: 4px;
}
.design-canvas.has-background .canvas-el.is-text .el-text {
  background: rgba(255,255,255,.88);
}
.canvas-el {
  border: 1px dashed transparent;
  border-radius: 4px;
  cursor: grab;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  position: relative;
  transition: box-shadow .15s var(--ease), border-color .15s var(--ease);
  background: rgba(255,255,255,.55);
}
.canvas-el:hover { border-color: rgba(0,120,212,.35); }
.canvas-el.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
  z-index: 2;
}
.canvas-el.is-dragging {
  cursor: grabbing;
  opacity: .92;
  z-index: 5;
  box-shadow: var(--shadow-md);
}
.canvas-el.is-editing {
  cursor: text;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  z-index: 4;
  user-select: text;
}
.canvas-el .el-text {
  padding: .5rem .6rem;
  height: 100%;
  outline: none;
  line-height: 1.45;
  overflow: auto;
  pointer-events: none; /* allow drag from text until edit mode */
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.canvas-el.is-editing .el-text {
  pointer-events: auto;
  cursor: text;
  background: #fff;
}
.canvas-el .el-text p { margin: 0 0 .4em; }
.canvas-el .el-text p:last-child { margin-bottom: 0; }

/* Text alignment toolbar in properties */
.align-toolbar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .35rem;
}
.align-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
  color: var(--text-secondary);
  transition: background .15s var(--ease), border-color .15s var(--ease), color .15s var(--ease);
}
.align-btn:hover { background: var(--bg); color: var(--text); }
.align-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.align-btn[data-align="left"] .align-icon { letter-spacing: -1px; }
.align-btn[data-align="center"] .align-icon { }
.align-btn[data-align="right"] .align-icon { transform: scaleX(-1); }
.align-icon { font-size: 1rem; line-height: 1; }
.canvas-el img, .canvas-el video {
  width: 100%; height: 100%; object-fit: contain; display: block;
  pointer-events: none;
}
/* Layer system: 1 foreground, 2 background */
.canvas-el.is-level-bg {
  z-index: 1;
}
.canvas-el.is-level-fg {
  z-index: 10;
}
.canvas-el.is-bg-image {
  background: transparent !important;
  border-style: dashed;
  overflow: hidden;
}
.canvas-el.is-bg-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
}
.canvas-el.is-level-bg.is-text .el-text {
  background: rgba(255,255,255,.55);
}

/* Position level control */
.level-toolbar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .4rem;
}
.level-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .15rem;
  min-height: 52px;
  padding: .4rem .35rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
  color: var(--text-secondary);
  transition: background .15s var(--ease), border-color .15s var(--ease), color .15s var(--ease);
}
.level-btn:hover { background: var(--bg); color: var(--text); }
.level-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}
.level-num {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1;
}
.level-label {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.canvas-el .el-shape-fill {
  width: 100%; height: 100%; min-height: 24px; border-radius: 6px;
}
.canvas-el .el-spacer-fill {
  height: 100%;
  background: repeating-linear-gradient(45deg, #f3f3f3, #f3f3f3 8px, #eee 8px, #eee 16px);
}
.canvas-el .el-placeholder {
  display: grid; place-items: center; height: 100%;
  color: #8a8a8a; background: #f3f3f3; font-size: .85rem; text-align: center; padding: .5rem;
}
.canvas-el .el-placeholder-dark {
  background: #111; color: #ccc;
}
.tool-btn {
  width: 100%;
  text-align: left;
  margin-bottom: .35rem;
}
.slide-list-item {
  display: flex; align-items: center; gap: .4rem;
  padding: .45rem .5rem;
  border-radius: var(--radius-sm);
  cursor: grab;
  border: 1px solid transparent;
  margin-bottom: .25rem;
  font-size: .85rem;
}
.slide-list-item:hover { background: var(--bg); }
.slide-list-item.active {
  background: var(--accent-soft);
  border-color: rgba(0,120,212,.25);
  color: var(--accent);
  font-weight: 600;
}
.props-section { margin-bottom: 1rem; }
.props-section h3 {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-tertiary);
  margin-bottom: .5rem;
}
.save-indicator { font-size: .8rem; color: var(--text-tertiary); }
.save-indicator.saving { color: var(--warning); }
.save-indicator.saved { color: var(--success); }

/* Key reveal */
.key-reveal {
  background: #1a1a1a;
  color: #e8f3ff;
  padding: .85rem 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  word-break: break-all;
  font-size: .9rem;
}