*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:          #0A0908;
  --bg-warm:     #0F0D0B;
  --surface:     #141210;
  --surface-2:   #1C1915;
  --border:      #262220;
  --border-2:    #322E28;
  --accent:      #C8A84A;
  --accent-soft: rgba(200, 168, 74, 0.14);
  --text:        #EDE8E0;
  --text-2:      #9C9690;
  --text-3:      #5A5550;
  --verse-bg:    rgba(93, 130, 187, 0.16);
  --verse-fg:    #7BA7D4;
  --chorus-bg:   rgba(200, 168, 74, 0.18);
  --chorus-fg:   #C8A84A;
  --bridge-bg:   rgba(187, 93, 140, 0.18);
  --bridge-fg:   #D47BAA;
  --green:       #5DBB8A;

  --font-d: 'Cormorant Garamond', Georgia, serif;
  --font-u: 'Inter', system-ui, -apple-system, sans-serif;

  --px: clamp(1.5rem, 5vw, 4rem);
  --py: clamp(1.25rem, 4vh, 2.5rem);
  --r:  10px;
  --r-s: 6px;
  --t: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

html { height: 100%; }

body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-u);
  -webkit-font-smoothing: antialiased;
}

#app {
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* ══════════════════════════════
   INSTRUCTOR VIEW
══════════════════════════════ */

.instructor-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* ── Slides container ── */

.slides-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  min-height: 0;
}

.slide {
  position: absolute;
  inset: 0;
  padding: var(--py) var(--px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  transform: translateX(52px);
  transition: opacity 0.42s ease, transform 0.42s ease;
  pointer-events: none;
  overflow-y: auto;
  gap: 0;
}

.slide.active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.slide.exiting {
  opacity: 0;
  transform: translateX(-52px);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

/* ── Slide typography ── */

.slide-eyebrow {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.slide-headline {
  font-family: var(--font-d);
  font-weight: 600;
  font-size: clamp(2.2rem, 5.2vw, 5.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  max-width: 22ch;
  white-space: pre-line;
}

.slide-headline em {
  font-style: italic;
  color: var(--accent);
}

.slide-subhead {
  font-family: var(--font-d);
  font-size: clamp(1.1rem, 2.2vw, 1.8rem);
  font-style: italic;
  color: var(--text-2);
  margin-bottom: 1.25rem;
  font-weight: 400;
}

.slide-body {
  font-size: clamp(0.9rem, 1.7vw, 1.3rem);
  color: var(--text-2);
  line-height: 1.72;
  max-width: 58ch;
  white-space: pre-line;
}

.slide-body strong { color: var(--text); font-weight: 500; }

/* ── ABABCBB structure blocks ── */

.structure-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.s-block {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: clamp(2.2rem, 4vw, 3.5rem);
  height: clamp(2.2rem, 4vw, 3.5rem);
  border-radius: var(--r-s);
  font-weight: 700;
  font-size: clamp(0.85rem, 1.6vw, 1.3rem);
  letter-spacing: 0.02em;
}

.s-block.verse  { background: var(--verse-bg);  color: var(--verse-fg);  border: 1px solid rgba(93,130,187,0.28); }
.s-block.chorus { background: var(--chorus-bg); color: var(--chorus-fg); border: 1px solid rgba(200,168,74,0.28); }
.s-block.bridge { background: var(--bridge-bg); color: var(--bridge-fg); border: 1px solid rgba(187,93,140,0.28); }

.structure-legend {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  color: var(--text-2);
}

.legend-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
}

/* ── Era grid (slide 3) ── */

.era-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.25rem;
}

@media (max-width: 600px) {
  .era-grid { grid-template-columns: 1fr; }
}

.era-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.1rem;
}

.era-card .yr {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.25rem;
}

.era-card .artist {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 0.15rem;
}

.era-card .song {
  font-family: var(--font-d);
  font-style: italic;
  font-size: clamp(0.9rem, 1.5vw, 1.1rem);
  color: var(--text);
  margin-bottom: 0.75rem;
}

.mini-blocks {
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
}

.mini-block {
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.mini-block.v { background: var(--verse-bg);  color: var(--verse-fg); }
.mini-block.c { background: var(--chorus-bg); color: var(--chorus-fg); }
.mini-block.b { background: var(--bridge-bg); color: var(--bridge-fg); }

/* ── Data table (slide 4) ── */

.data-table {
  width: 100%;
  max-width: 800px;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: clamp(0.72rem, 1.3vw, 0.96rem);
}

.data-table th {
  padding: 0.5rem 0.85rem;
  text-align: left;
  font-weight: 500;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  border-bottom: 1px solid var(--border-2);
}

.data-table td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.data-table tr:last-child td { border-bottom: none; }

.data-table .col-name    { color: var(--text);   font-weight: 500; white-space: nowrap; }
.data-table .col-desc    { color: var(--text-2); }
.data-table .col-example { color: var(--text-3); font-style: italic; }

/* ── Evidence list (slide 5) ── */

.big-answer {
  font-family: var(--font-d);
  font-size: clamp(4rem, 12vw, 10rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.evidence-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.evidence-list li {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-size: clamp(0.85rem, 1.6vw, 1.15rem);
}

.ev-title {
  font-family: var(--font-d);
  font-style: italic;
  font-size: 1.1em;
  color: var(--text);
}

.ev-artist { color: var(--text-3); font-size: 0.85em; }
.ev-note   { color: var(--text-3); font-size: 0.8em; font-style: italic; }

/* ── Hero journey table (slide 6) ── */

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border-2);
  border-radius: var(--r);
  overflow: hidden;
  margin-top: 1.25rem;
  max-width: 760px;
}

.hero-col-head {
  padding: 0.55rem 1rem;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  background: var(--surface);
  border-bottom: 1px solid var(--border-2);
}

.hero-col-head:first-child { border-right: 1px solid var(--border-2); }

.hero-cell {
  padding: 0.6rem 1rem;
  font-size: clamp(0.72rem, 1.25vw, 0.92rem);
  border-bottom: 1px solid var(--border);
}

.hero-cell:nth-child(odd)  { border-right: 1px solid var(--border); color: var(--text-2); }
.hero-cell:nth-child(even) { color: var(--text-3); font-style: italic; }

.hero-grid .hero-cell:nth-last-child(-n+2) { border-bottom: none; }

/* ── Thesis (slide 8) ── */

.thesis-wrap { display: flex; flex-direction: column; gap: 0; }

.thesis-line {
  display: block;
  font-family: var(--font-d);
  font-weight: 600;
  font-size: clamp(2.8rem, 6.5vw, 6.5rem);
  line-height: 1.0;
  letter-spacing: -0.025em;
}

.thesis-line.muted { color: var(--text-3); }
.thesis-line.lit   { color: var(--text);   margin-bottom: 1.5rem; }

.thesis-cue {
  font-size: clamp(0.85rem, 1.5vw, 1.05rem);
  color: var(--accent);
  letter-spacing: 0.06em;
}

/* ── QR block ── */

.qr-block {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.75rem;
  padding: 1.1rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--r);
  width: fit-content;
}

.qr-wrap {
  width: 90px; height: 90px;
  background: #fff;
  border-radius: 5px;
  padding: 5px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-wrap canvas, .qr-wrap img { display: block; width: 80px; height: 80px; }

.qr-info { display: flex; flex-direction: column; gap: 0.3rem; }
.qr-cta  { font-size: 0.9rem; font-weight: 500; color: var(--text); }
.qr-sub  { font-size: 0.75rem; color: var(--text-3); }
.qr-url  { font-size: 0.65rem; color: var(--text-3); font-family: monospace; margin-top: 0.2rem; }

/* ═══════════ INSTRUCTOR NAV ═══════════ */

.instructor-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem var(--px);
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.nav-btn {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  width: 34px; height: 34px;
  border-radius: var(--r-s);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  line-height: 1;
  transition: background var(--t), color var(--t);
  flex-shrink: 0;
  padding: 0;
}

.nav-btn:hover:not(:disabled) { background: var(--border-2); color: var(--text); }
.nav-btn:disabled { opacity: 0.22; cursor: not-allowed; }

.slide-progress {
  flex: 1;
  display: flex;
  gap: 6px;
  justify-content: center;
  align-items: center;
}

.progress-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--border-2);
  border: none;
  cursor: pointer;
  transition: background var(--t), transform var(--t);
  padding: 0;
  flex-shrink: 0;
}

.progress-dot.active { background: var(--accent); transform: scale(1.4); }
.progress-dot:hover:not(.active) { background: var(--text-3); }

.key-hint {
  font-size: 0.62rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
  flex-shrink: 0;
  display: flex;
  gap: 3px;
  align-items: center;
}

.key-hint kbd {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid var(--border-2);
  border-radius: 3px;
  font-size: inherit;
  font-family: inherit;
  color: var(--text-3);
}

/* ══════════════════════════════
   STUDENT VIEW
══════════════════════════════ */

.student-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.student-header {
  padding: 0.85rem var(--px);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.student-header .workshop-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.student-header .gss-label {
  font-size: 0.68rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
}

/* ── Tabs ── */

.student-tabs {
  display: flex;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.tab-btn {
  flex: 1;
  padding: 0.7rem 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-3);
  font-family: var(--font-u);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--t), border-color var(--t);
}

.tab-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* ── Handout (slide companion) ── */

.student-panel {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

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

.handout {
  padding: var(--py) var(--px);
  display: flex;
  flex-direction: column;
  gap: 0;
}

.handout-section {
  padding-bottom: 1.75rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.handout-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.h-label {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.h-title {
  font-family: var(--font-d);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 0.45rem;
}

.h-body {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.65;
  white-space: pre-line;
}

.h-mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  margin-top: 0.65rem;
}

.h-mini-table td {
  padding: 0.38rem 0.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-2);
  vertical-align: top;
}

.h-mini-table tr:last-child td { border-bottom: none; }
.h-mini-table td:first-child { color: var(--text); font-weight: 500; white-space: nowrap; width: 30%; }

.h-structure-row {
  display: flex;
  gap: 4px;
  margin-top: 0.65rem;
  flex-wrap: wrap;
}

/* ══════════════════════════════
   ACTIVITY VIEW
══════════════════════════════ */

.activity-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.activity-header {
  padding: 0.85rem var(--px);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.activity-title { font-family: var(--font-d); font-size: 1.15rem; font-weight: 600; }
.activity-sub   { font-size: 0.68rem; color: var(--text-3); margin-top: 0.1rem; }

.reset-btn {
  background: none;
  border: 1px solid var(--border-2);
  color: var(--text-3);
  padding: 0.35rem 0.75rem;
  border-radius: var(--r-s);
  font-family: var(--font-u);
  font-size: 0.72rem;
  cursor: pointer;
  transition: color var(--t), border-color var(--t);
}

.reset-btn:hover { color: var(--text); border-color: var(--text-3); }

/* ── Drop zones ── */

.zones-scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0.85rem var(--px);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.drop-zone {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 52px;
  background: var(--surface);
  border: 1.5px dashed var(--border-2);
  border-radius: var(--r);
  padding: 0.45rem 0.75rem;
  transition: border-color var(--t), background var(--t);
  position: relative;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.drop-zone.has-card {
  border-style: solid;
  border-color: var(--border);
  background: var(--bg-warm);
}

.zone-label-col {
  flex-shrink: 0;
  width: 64px;
}

.zone-label {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  line-height: 1.2;
}

.zone-sublabel {
  font-size: 0.58rem;
  color: var(--text-3);
  opacity: 0.6;
}

.zone-content { flex: 1; min-width: 0; }

.zone-placeholder {
  font-size: 0.78rem;
  color: var(--text-3);
  font-style: italic;
}

.zone-label-col.type-verse    .zone-label { color: var(--verse-fg); }
.zone-label-col.type-chorus   .zone-label { color: var(--chorus-fg); }
.zone-label-col.type-bridge   .zone-label { color: var(--bridge-fg); }

/* ── Cards ── */

.card {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--r-s);
  padding: 0.45rem 0.7rem;
  font-size: 0.82rem;
  color: var(--text);
  cursor: grab;
  touch-action: none;
  user-select: none;
  line-height: 1.35;
  transition: background var(--t), border-color var(--t);
}

.card:hover { background: var(--border-2); border-color: var(--text-3); }
.card.is-dragging { opacity: 0.15; }

/* ghost: injected into body, follows pointer */
.drag-ghost {
  position: fixed;
  z-index: 9999;
  pointer-events: none;
  background: var(--surface-2);
  border: 1px solid var(--accent);
  border-radius: var(--r-s);
  padding: 0.45rem 0.7rem;
  font-size: 0.82rem;
  color: var(--text);
  line-height: 1.35;
  box-shadow: 0 12px 40px rgba(0,0,0,0.65), 0 2px 8px rgba(0,0,0,0.4);
  transform: rotate(1.5deg) scale(1.04);
  max-width: 220px;
  font-family: var(--font-u);
}

/* ── Card pool ── */

.pool-wrap {
  flex-shrink: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 0.85rem var(--px);
}

.pool-label {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.55rem;
}

.card-pool {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.card-pool:empty::after {
  content: "All cards placed.";
  font-size: 0.78rem;
  color: var(--green);
  font-style: italic;
}

/* ══════════════════════════════
   SONG LINKS
══════════════════════════════ */

.song-link {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--t), text-decoration-color var(--t);
}

.song-link:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

/* stand-alone "Listen" button on casestudy slide */
.listen-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1.25rem;
  padding: 0.45rem 1rem;
  border-radius: var(--r-s);
  border: 1px solid rgba(200,168,74,0.35) !important;
  background: var(--accent-soft) !important;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent) !important;
  text-decoration: none !important;
  letter-spacing: 0.04em;
}

.listen-btn:hover {
  background: rgba(200,168,74,0.22) !important;
  color: var(--accent) !important;
}

/* ══════════════════════════════
   SONG OVERLAY
══════════════════════════════ */

.song-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.22s ease;
  pointer-events: none;
}

.song-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.song-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-bottom: none;
  border-radius: var(--r) var(--r) 0 0;
  overflow: hidden;
  transform: translateY(24px);
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.song-overlay.open .song-card {
  transform: translateY(0);
}

@media (min-width: 480px) {
  .song-overlay {
    align-items: center;
  }
  .song-card {
    border-bottom: 1px solid var(--border-2);
    border-radius: var(--r);
    transform: translateY(12px) scale(0.97);
    margin-bottom: 0;
  }
  .song-overlay.open .song-card {
    transform: translateY(0) scale(1);
  }
}

.song-card-top {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.1rem 0.9rem;
  border-bottom: 1px solid var(--border);
}

.song-note {
  font-size: 1.6rem;
  color: var(--accent);
  flex-shrink: 0;
  line-height: 1;
}

.song-card-info { flex: 1; min-width: 0; }

.song-card-title {
  font-family: var(--font-d);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.song-card-meta {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 0.15rem;
}

.overlay-close {
  background: none;
  border: 1px solid var(--border-2);
  color: var(--text-3);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color var(--t), border-color var(--t);
  padding: 0;
}

.overlay-close:hover { color: var(--text); border-color: var(--text-3); }

.song-card-platforms {
  display: flex;
  flex-direction: column;
  padding: 0.6rem;
  gap: 0.4rem;
}

.platform-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.9rem;
  border-radius: var(--r-s);
  background: var(--p-bg);
  color: var(--p-fg);
  text-decoration: none;
  font-family: var(--font-u);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: opacity var(--t), transform 0.15s ease;
}

.platform-btn:hover {
  opacity: 0.88;
  transform: translateX(2px);
}

.platform-name { flex: 1; }
.platform-arrow { font-size: 0.85rem; opacity: 0.7; }

/* ══════════════════════════════
   PLAYLIST SLIDE
══════════════════════════════ */

.pl-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  max-width: 820px;
}

@media (max-width: 640px) {
  .pl-grid { grid-template-columns: 1fr; }
}

.pl-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}

.pl-group-label {
  padding: 0.5rem 0.85rem;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.playlist-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  width: 100%;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  text-decoration: none !important;
  border-radius: 0 !important;
}

.playlist-row:last-child { border-bottom: none; }

.pl-title {
  font-family: var(--font-d);
  font-style: italic;
  font-size: clamp(0.82rem, 1.3vw, 0.96rem);
  color: var(--text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pl-meta {
  font-size: 0.65rem;
  color: var(--text-3);
  flex-shrink: 0;
  white-space: nowrap;
}

.pl-arrow {
  font-size: 0.65rem;
  color: var(--accent);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--t);
}

.playlist-row:hover .pl-arrow { opacity: 1; }

/* ══════════════════════════════
   HANDOUT PLAYLIST
══════════════════════════════ */

.h-pl-group { margin-top: 0.85rem; }

.h-pl-group-label {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.35rem;
}

.h-pl-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--border);
  text-align: left;
  text-decoration: none !important;
  border-radius: 0 !important;
}

.h-pl-row:last-child { border-bottom: none; }

.h-pl-title {
  font-family: var(--font-d);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--text);
  flex: 1;
}

.h-pl-artist {
  font-size: 0.7rem;
  color: var(--text-3);
  flex-shrink: 0;
}

.h-pl-arrow {
  font-size: 0.65rem;
  color: var(--accent);
  flex-shrink: 0;
}

/* ══════════════════════════════
   W2: COMPARISON SLIDE
══════════════════════════════ */

.cmp-grid {
  display: grid;
  grid-template-columns: 1fr 2px 1fr;
  gap: 1.5rem;
  margin-top: 1.25rem;
  max-width: 800px;
}

.cmp-divider {
  background: var(--border-2);
  border-radius: 1px;
  align-self: stretch;
}

.cmp-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.cmp-left .cmp-label  { color: var(--text-3); }
.cmp-right .cmp-label { color: var(--accent); }

.cmp-desc {
  font-family: var(--font-d);
  font-style: italic;
  font-size: clamp(0.85rem, 1.5vw, 1.05rem);
  color: var(--text-2);
  margin-bottom: 0.85rem;
  line-height: 1.4;
}

.cmp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.cmp-list li {
  font-family: var(--font-d);
  font-style: italic;
  font-size: clamp(0.82rem, 1.35vw, 1.0rem);
  color: var(--text);
  padding-left: 1rem;
  position: relative;
  line-height: 1.4;
}

.cmp-left  .cmp-list li::before { content: '—'; position: absolute; left: 0; color: var(--text-3); }
.cmp-right .cmp-list li::before { content: '→'; position: absolute; left: 0; color: var(--accent); }

.cmp-note {
  font-size: 0.72rem;
  color: var(--text-3);
  font-style: italic;
  padding: 0.45rem 0.65rem;
  border-left: 2px solid var(--border-2);
  line-height: 1.5;
}

.cmp-right .cmp-note {
  border-left-color: rgba(200, 168, 74, 0.35);
  color: var(--text-2);
}

@media (max-width: 580px) {
  .cmp-grid { grid-template-columns: 1fr; }
  .cmp-divider { height: 1px; }
}

/* ══════════════════════════════
   W2: CONTRAST SLIDE
══════════════════════════════ */

.contrast-pairs {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.25rem;
  max-width: 840px;
}

.contrast-pair {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}

.contrast-pair-label {
  padding: 0.45rem 0.85rem;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.contrast-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
}

.contrast-side {
  padding: 0.65rem 0.85rem;
  border-radius: var(--r-s);
}

.contrast-side.weak   { background: rgba(255,255,255,0.03); border: 1px solid var(--border); }
.contrast-side.strong { background: var(--accent-soft);     border: 1px solid rgba(200,168,74,0.2); }

.contrast-badge {
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.weak   .contrast-badge { color: var(--text-3); }
.strong .contrast-badge { color: var(--accent); }

.contrast-text {
  font-family: var(--font-d);
  font-style: italic;
  font-size: clamp(0.82rem, 1.4vw, 1.05rem);
  color: var(--text);
  line-height: 1.5;
  white-space: pre-line;
}

.contrast-arrow {
  color: var(--accent);
  font-size: 1.1rem;
  flex-shrink: 0;
  padding: 0 0.25rem;
}

.contrast-note {
  padding: 0.5rem 0.85rem;
  font-size: 0.72rem;
  color: var(--text-2);
  font-style: italic;
  border-top: 1px solid var(--border);
}

@media (max-width: 560px) {
  .contrast-row { grid-template-columns: 1fr; gap: 0.25rem; }
  .contrast-arrow { text-align: center; }
}

/* ══════════════════════════════
   W2: CAMERA SLIDE
══════════════════════════════ */

.camera-cues {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: 1.5rem;
  max-width: 600px;
}

.camera-cue {
  font-family: var(--font-d);
  font-style: italic;
  font-size: clamp(0.9rem, 1.8vw, 1.25rem);
  color: var(--text-2);
  padding: 0.65rem 1rem;
  background: var(--surface);
  border-left: 3px solid var(--border-2);
  border-radius: 0 var(--r-s) var(--r-s) 0;
  line-height: 1.45;
}

.camera-cue:last-child {
  border-left-color: var(--accent);
  color: var(--text);
}

/* ══════════════════════════════
   W2: ZOOM SLIDE
══════════════════════════════ */

.zoom-slide-diagram {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-top: 1.25rem;
  max-width: 560px;
}

.zoom-slide-lvl {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--surface);
}

.zoom-slide-lvl-2 { width: 80%; }
.zoom-slide-lvl-3 { width: 60%; background: var(--accent-soft); border-color: rgba(200,168,74,0.25); }

@media (max-width: 600px) {
  .zoom-slide-lvl-1,
  .zoom-slide-lvl-2,
  .zoom-slide-lvl-3 { width: 100%; }
}

.zoom-slide-tag {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.15rem;
}

.zoom-slide-lvl-3 .zoom-slide-tag { color: var(--accent); }

.zoom-slide-sublabel {
  font-size: 0.62rem;
  color: var(--text-3);
  margin-bottom: 0.35rem;
}

.zoom-slide-example {
  font-family: var(--font-d);
  font-style: italic;
  font-size: clamp(0.9rem, 1.7vw, 1.15rem);
  color: var(--text);
  margin-bottom: 0.2rem;
  white-space: pre-line;
}

.zoom-slide-note {
  font-size: 0.68rem;
  color: var(--text-3);
}

.zoom-slide-connector {
  padding: 0.2rem 0 0.2rem 1.4rem;
  color: var(--text-3);
  font-size: 0.9rem;
}

/* ══════════════════════════════
   W2: ZOOM-IN MAP ACTIVITY
══════════════════════════════ */

.zoom-map-scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0.85rem var(--px);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.zoom-map {
  display: flex;
  flex-direction: column;
}

.zoom-level {
  background: var(--surface);
  border: 1.5px solid var(--border-2);
  border-radius: var(--r);
  padding: 0.85rem;
}

.zoom-level-3 {
  border-color: rgba(200, 168, 74, 0.28);
  background: var(--accent-soft);
}

.zoom-level-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}

.zoom-level-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.zoom-level-3 .zoom-level-num {
  background: rgba(200, 168, 74, 0.12);
  border-color: rgba(200, 168, 74, 0.3);
  color: var(--accent);
}

.zoom-level-labels { flex: 1; min-width: 0; }

.zoom-level-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  line-height: 1.2;
}

.zoom-level-3 .zoom-level-label { color: var(--accent); }

.zoom-level-sublabel {
  font-size: 0.6rem;
  color: var(--text-3);
  opacity: 0.7;
  margin-top: 0.1rem;
}

.zoom-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: var(--r-s);
  color: var(--text);
  font-family: var(--font-u);
  font-size: 0.9rem;
  padding: 0.55rem 0.75rem;
  outline: none;
  resize: none;
  transition: border-color var(--t);
  line-height: 1.5;
  -webkit-appearance: none;
}

.zoom-input::placeholder { color: var(--text-3); font-style: italic; }
.zoom-input:focus        { border-color: var(--accent); }

.zoom-level-3 .zoom-input { background: var(--bg-warm); }

.zoom-film-test {
  margin-top: 0.45rem;
  font-size: 0.68rem;
  color: var(--accent);
  font-style: italic;
  opacity: 0;
  transition: opacity var(--t);
}

.zoom-film-test.visible { opacity: 1; }

.zoom-step-arrow {
  text-align: center;
  color: var(--text-3);
  font-size: 1rem;
  padding: 0.3rem 0;
}

/* ─── Seed cards ─────────────────────── */

.seed-wrap { flex-shrink: 0; }

.seed-label {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.55rem;
}

.seed-pool {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.seed-card {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--r-s);
  padding: 0.38rem 0.75rem;
  font-size: 0.78rem;
  font-family: var(--font-u);
  color: var(--text-2);
  cursor: pointer;
  transition: background var(--t), border-color var(--t), color var(--t);
}

.seed-card:hover {
  background: var(--border-2);
  color: var(--text);
}

.seed-card.active {
  background: var(--accent-soft);
  border-color: rgba(200, 168, 74, 0.35);
  color: var(--accent);
}

/* ══════════════════════════════
   REVEAL.JS — base overrides
══════════════════════════════ */

html, body { overflow: hidden; }

.reveal {
  position: fixed !important;
  inset: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-u);
}

.reveal .slides {
  text-align: left;
}

.reveal .slides > section {
  padding: 0;
  height: 100%;
  text-align: left;
  font-size: 1rem;
  line-height: 1.5;
}

.slide-inner {
  padding: var(--py) var(--px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  box-sizing: border-box;
}

/* Reveal controls */
.reveal .controls { color: var(--accent); }
.reveal .controls .controls-arrow { opacity: 0.4; }
.reveal .controls .controls-arrow:hover { opacity: 1; }

/* Reveal progress bar */
.reveal .progress { color: var(--accent); height: 3px; }

/* ══════════════════════════════
   FLOAT BAR
══════════════════════════════ */

.float-bar {
  position: fixed;
  top: 0.85rem;
  right: 1rem;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.float-btn {
  background: rgba(10,9,8,0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-2);
  color: var(--text-3);
  padding: 0.3rem 0.6rem;
  border-radius: var(--r-s);
  font-family: var(--font-u);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: color var(--t), border-color var(--t), background var(--t);
  line-height: 1.2;
  white-space: nowrap;
}

.float-btn:hover {
  color: var(--text);
  border-color: var(--text-3);
  background: rgba(20,18,16,0.92);
}

.float-btn.active {
  color: var(--accent);
  border-color: rgba(200,168,74,0.4);
  background: rgba(200,168,74,0.08);
}

.float-btn-icon {
  padding: 0.3rem 0.5rem;
  font-size: 0.9rem;
}

/* ══════════════════════════════
   PANEL BACKDROP
══════════════════════════════ */

.panel-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.panel-backdrop.visible {
  opacity: 1;
  pointer-events: auto;
}

/* ══════════════════════════════
   SIDE PANELS
══════════════════════════════ */

.side-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(480px, 96vw);
  background: var(--surface);
  border-left: 1px solid var(--border-2);
  z-index: 300;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.side-panel.open {
  transform: translateX(0);
}

.side-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--surface-2);
}

.side-panel-title {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2);
}

.side-panel-close {
  background: none;
  border: 1px solid var(--border-2);
  color: var(--text-3);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.72rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--t), border-color var(--t);
  padding: 0;
  flex-shrink: 0;
}

.side-panel-close:hover { color: var(--text); border-color: var(--text-3); }

.side-panel-body {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Handout inside panel needs to scroll */
.side-panel-body .handout {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  flex: 1;
}

/* Activity inside panel needs full height layout */
.side-panel-body .activity-view {
  flex: 1;
  min-height: 0;
}