@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&display=swap');

:root {
  --navy: #0D1B2A;
  --navy-light: #1a2d42;
  --purple: #7B2FBE;
  --purple-light: #9d4fd4;
  --teal: #00D4AA;
  --yellow: #FFD166;
  --pink: #FF6B9D;
  --orange: #FF9A3C;
  --white: #ffffff;
  --text-light: #e8f4ff;
  --text-muted: #8aa8c8;
  --card-bg: rgba(255,255,255,0.07);
  --card-border: rgba(255,255,255,0.12);
  --shadow-glow-purple: 0 0 30px rgba(123,47,190,0.5);
  --shadow-glow-teal: 0 0 30px rgba(0,212,170,0.4);
  --shadow-glow-yellow: 0 0 30px rgba(255,209,102,0.4);
  --radius: 20px;
  --radius-lg: 28px;
  --transition: 0.3s cubic-bezier(0.34,1.56,0.64,1);
}

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

html, body {
  font-family: 'Nunito', sans-serif;
  background: var(--navy);
  color: var(--text-light);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── STARFIELD BACKGROUND ─── */
.starfield {
  position: fixed; inset: 0; z-index: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(123,47,190,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(0,212,170,0.1) 0%, transparent 50%),
              linear-gradient(135deg, #0D1B2A 0%, #0a1520 50%, #0d1b2a 100%);
}
.star {
  position: absolute; border-radius: 50%;
  background: white; animation: twinkle var(--dur, 3s) ease-in-out infinite var(--delay, 0s);
}
@keyframes twinkle {
  0%, 100% { opacity: 0.2; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.3); }
}

/* ─── LAYOUT ─── */
.page-content { position: relative; z-index: 1; }

/* ─── HOME SCREEN ─── */
.home-hero {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 100vh; padding: 2rem; text-align: center; gap: 1.5rem;
}
.home-logo { font-size: clamp(2.2rem, 6vw, 4rem); font-weight: 900; letter-spacing: -1px;
  background: linear-gradient(135deg, var(--teal), var(--purple-light), var(--yellow));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.home-tagline { font-size: 1.2rem; color: var(--text-muted); font-weight: 600; }
.mascot-container { width: 200px; height: 200px; animation: float 3s ease-in-out infinite; }
.mascot-container img { width: 100%; height: 100%; object-fit: contain; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-18px); }
}
.portal-buttons { display: flex; gap: 1.5rem; flex-wrap: wrap; justify-content: center; margin-top: 1rem; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 1rem 2rem; border-radius: 50px; font-family: 'Nunito', sans-serif;
  font-size: 1.1rem; font-weight: 800; cursor: pointer; border: none;
  transition: var(--transition); text-decoration: none; position: relative; overflow: hidden;
}
.btn::after {
  content: ''; position: absolute; inset: 0; background: rgba(255,255,255,0.15);
  opacity: 0; transition: opacity 0.2s;
}
.btn:hover::after { opacity: 1; }
.btn:active { transform: scale(0.96); }
.btn-primary {
  background: linear-gradient(135deg, var(--purple), var(--purple-light));
  color: white; box-shadow: var(--shadow-glow-purple);
}
.btn-primary:hover { transform: translateY(-3px) scale(1.04); box-shadow: 0 0 45px rgba(123,47,190,0.7); }
.btn-teal {
  background: linear-gradient(135deg, #00b890, var(--teal));
  color: var(--navy); box-shadow: var(--shadow-glow-teal);
}
.btn-teal:hover { transform: translateY(-3px) scale(1.04); box-shadow: 0 0 45px rgba(0,212,170,0.6); }
.btn-yellow {
  background: linear-gradient(135deg, #f5c842, var(--yellow));
  color: var(--navy); box-shadow: var(--shadow-glow-yellow);
}
.btn-yellow:hover { transform: translateY(-3px) scale(1.04); }
.btn-sm { padding: 0.5rem 1.2rem; font-size: 0.95rem; }
.btn-ghost {
  background: transparent; color: var(--text-muted); border: 2px solid var(--card-border);
}
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); transform: none; }

/* ─── GLASS CARD ─── */
.card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-lg); backdrop-filter: blur(12px);
  transition: var(--transition); position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-6px); border-color: rgba(255,255,255,0.25); }
.card::before {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}

/* ─── HUB HEADER ─── */
.hub-header {
  background: rgba(13,27,42,0.9); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border); padding: 1rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
}
.hub-title { font-size: 1.5rem; font-weight: 900;
  background: linear-gradient(90deg, var(--teal), var(--purple-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stars-bar { display: flex; gap: 0.4rem; align-items: center; }
.star-icon { font-size: 1.5rem; transition: var(--transition); filter: grayscale(1) opacity(0.3); }
.star-icon.earned { filter: none; animation: starPop 0.4s var(--transition) forwards; }
@keyframes starPop { 0%{transform:scale(0)} 70%{transform:scale(1.3)} 100%{transform:scale(1)} }

/* ─── TOPIC GRID ─── */
.topics-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem; padding: 2rem;
}
.topic-card {
  cursor: pointer; padding: 2rem; display: flex; flex-direction: column;
  align-items: center; gap: 1rem; text-align: center;
}
.topic-card.locked { opacity: 0.55; cursor: not-allowed; }
.topic-icon { font-size: 3.5rem; line-height: 1; transition: transform 0.3s; }
.topic-card:not(.locked):hover .topic-icon { transform: scale(1.2) rotate(-5deg); }
.topic-name { font-size: 1.25rem; font-weight: 800; color: var(--white); }
.topic-desc { font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; }
.topic-badge {
  width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center;
  justify-content: center; font-size: 1rem; margin-top: auto;
}
.topic-badge.complete { background: var(--teal); box-shadow: var(--shadow-glow-teal); }
.topic-badge.locked-icon { background: rgba(255,255,255,0.1); }
.topic-glow { position: absolute; inset: 0; border-radius: inherit; opacity: 0; transition: opacity 0.3s; }
.topic-card:not(.locked):hover .topic-glow { opacity: 1; }

/* ─── MODAL ─── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(5,10,18,0.85); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center; padding: 1.5rem;
  opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: linear-gradient(135deg, #1a2d42, #0f2035);
  border: 1px solid var(--card-border); border-radius: var(--radius-lg);
  width: 100%; max-width: 680px; max-height: 90vh; overflow-y: auto;
  position: relative; animation: modalIn 0.35s var(--transition) forwards;
}
@keyframes modalIn { from{transform:scale(0.85) translateY(20px);opacity:0} to{transform:scale(1) translateY(0);opacity:1} }
.modal-close {
  position: absolute; top: 1rem; right: 1rem; background: rgba(255,255,255,0.1);
  border: none; color: white; width: 36px; height: 36px; border-radius: 50%;
  cursor: pointer; font-size: 1.1rem; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.modal-close:hover { background: rgba(255,255,255,0.2); }

/* ─── LESSON SLIDE ─── */
.lesson-header { padding: 1.5rem 2rem 0; }
.lesson-progress-bar { height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; margin: 1rem 0; }
.lesson-progress-fill { height: 100%; border-radius: 3px;
  background: linear-gradient(90deg, var(--teal), var(--purple)); transition: width 0.4s ease; }
.lesson-body { padding: 1.5rem 2rem; }
.lesson-visual {
  font-size: 5rem; text-align: center; padding: 1.5rem;
  background: rgba(255,255,255,0.04); border-radius: var(--radius); margin-bottom: 1.5rem;
  min-height: 120px; display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
  gap: 0.5rem;
}
.lesson-slide-title { font-size: 1.4rem; font-weight: 900; margin-bottom: 0.75rem; color: var(--white); }
.lesson-text { font-size: 1rem; line-height: 1.7; color: var(--text-light); }
.lesson-footer { padding: 1rem 2rem 1.5rem; display: flex; justify-content: space-between; align-items: center; }
.slide-counter { font-size: 0.9rem; color: var(--text-muted); font-weight: 600; }

/* ─── MINI GAME ─── */
.mini-game-area { padding: 1.5rem 2rem; }
.sort-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; }
.sort-bucket {
  border: 2px dashed var(--card-border); border-radius: var(--radius);
  min-height: 100px; padding: 1rem; text-align: center;
  transition: border-color 0.2s; background: rgba(255,255,255,0.03);
}
.sort-bucket.drag-over { border-color: var(--teal); background: rgba(0,212,170,0.08); }
.sort-bucket h4 { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.emoji-items { display: flex; flex-wrap: wrap; gap: 0.4rem; justify-content: center; margin: 1rem 0; }
.emoji-item {
  font-size: 2rem; cursor: grab; padding: 0.3rem; border-radius: 8px;
  transition: transform 0.2s; display: inline-block; user-select: none;
  background: rgba(255,255,255,0.06); border: 1px solid var(--card-border);
}
.emoji-item:hover { transform: scale(1.15); }
.emoji-item.placed { opacity: 0.5; cursor: default; }

/* ─── QUIZ ─── */
.quiz-question { font-size: 1.2rem; font-weight: 800; margin-bottom: 1.5rem; color: var(--white); }
.quiz-options { display: flex; flex-direction: column; gap: 0.75rem; }
.quiz-option {
  padding: 1rem 1.25rem; border-radius: var(--radius); border: 2px solid var(--card-border);
  background: rgba(255,255,255,0.05); cursor: pointer; font-family: 'Nunito', sans-serif;
  font-size: 1rem; font-weight: 600; color: var(--text-light); text-align: left;
  transition: all 0.2s;
}
.quiz-option:hover { border-color: var(--purple-light); background: rgba(123,47,190,0.15); }
.quiz-option.correct { border-color: var(--teal); background: rgba(0,212,170,0.15); color: var(--teal); }
.quiz-option.wrong { border-color: var(--pink); background: rgba(255,107,157,0.1); color: var(--pink); }
.quiz-explanation { margin-top: 1rem; padding: 0.75rem 1rem; background: rgba(0,212,170,0.08);
  border-left: 3px solid var(--teal); border-radius: 8px; font-size: 0.9rem; color: var(--text-light); }
.quiz-counter { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1rem; font-weight: 700; }

/* ─── STAR CELEBRATION ─── */
.celebration { text-align: center; padding: 2.5rem 2rem; }
.celebration-star { font-size: 5rem; animation: celebStar 0.6s var(--transition) forwards; display: block; }
@keyframes celebStar {
  0%{transform:scale(0) rotate(-30deg);opacity:0}
  70%{transform:scale(1.3) rotate(5deg)}
  100%{transform:scale(1) rotate(0);opacity:1}
}
.celebration h2 { font-size: 2rem; font-weight: 900; margin: 1rem 0 0.5rem;
  background: linear-gradient(135deg, var(--yellow), var(--orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.celebration p { color: var(--text-muted); font-size: 1rem; line-height: 1.6; }

/* ─── STUDIO LAYOUT ─── */
.studio-layout {
  display: grid;
  grid-template-columns: 240px 1fr 200px;
  grid-template-rows: auto 1fr auto;
  height: 100vh; overflow: hidden;
}
.studio-header {
  grid-column: 1 / -1; background: rgba(13,27,42,0.95); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border); padding: 0.8rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
}
.studio-sidebar-left {
  background: rgba(13,27,42,0.8); border-right: 1px solid var(--card-border);
  overflow-y: auto; padding: 1rem;
}
.studio-canvas-area {
  display: flex; align-items: center; justify-content: center;
  background: #060e18; overflow: hidden; position: relative;
}
.studio-sidebar-right {
  background: rgba(13,27,42,0.8); border-left: 1px solid var(--card-border);
  overflow-y: auto; padding: 1rem;
  display: flex; flex-direction: column; gap: 0.75rem;
}
.studio-footer {
  grid-column: 1 / -1; background: rgba(13,27,42,0.95); backdrop-filter: blur(20px);
  border-top: 1px solid var(--card-border); padding: 0.75rem 1.5rem;
  display: flex; align-items: center; gap: 1rem;
}

/* ─── TOOL PALETTE ─── */
.tool-tabs { display: flex; gap: 0.3rem; margin-bottom: 0.75rem; flex-wrap: wrap; }
.tool-tab {
  padding: 0.3rem 0.7rem; border-radius: 20px; font-size: 0.78rem; font-weight: 700;
  cursor: pointer; border: 1px solid var(--card-border); color: var(--text-muted);
  background: transparent; font-family: 'Nunito', sans-serif; transition: all 0.2s;
}
.tool-tab.active { background: var(--purple); color: white; border-color: var(--purple); }
.tool-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.4rem; }
.tool-item {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; border-radius: 12px; cursor: pointer;
  background: rgba(255,255,255,0.05); border: 1px solid var(--card-border);
  transition: all 0.2s;
}
.tool-item:hover { background: rgba(255,255,255,0.12); transform: scale(1.1); border-color: var(--teal); }
.tool-section-label { font-size: 0.75rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.08em; margin: 0.5rem 0 0.3rem; }
.bg-swatch {
  height: 44px; border-radius: 10px; cursor: pointer; border: 2px solid transparent;
  transition: all 0.2s; margin-bottom: 0.4rem;
}
.bg-swatch:hover, .bg-swatch.active { border-color: var(--teal); transform: scale(1.05); }

/* ─── SCENE CANVAS ─── */
.scene-canvas {
  position: relative; overflow: hidden; border-radius: 12px;
  box-shadow: 0 0 60px rgba(0,0,0,0.6);
  width: 100%; max-width: 640px; aspect-ratio: 16/9;
}
.scene-element {
  position: absolute; cursor: move; user-select: none;
  transform-origin: center center; transition: box-shadow 0.15s;
  display: flex; align-items: center; justify-content: center;
}
.scene-element.selected {
  outline: 2px solid var(--teal); border-radius: 4px;
  box-shadow: 0 0 0 3px rgba(0,212,170,0.25);
}
.scene-element .elem-text { font-family: 'Nunito', sans-serif; font-weight: 800;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5); pointer-events: none; }
.elem-controls {
  position: absolute; top: -28px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 4px; background: rgba(13,27,42,0.9); border-radius: 20px;
  padding: 3px 8px; white-space: nowrap;
}
.elem-ctrl-btn {
  font-size: 0.7rem; padding: 2px 6px; border-radius: 10px;
  background: rgba(255,255,255,0.1); border: none; color: white; cursor: pointer;
  font-family: 'Nunito', sans-serif; transition: background 0.2s;
}
.elem-ctrl-btn:hover { background: rgba(255,255,255,0.25); }
.speech-bubble {
  background: white; color: #1a1a2e; border-radius: 18px;
  padding: 0.5rem 0.9rem; font-weight: 800; font-size: inherit;
  position: relative; max-width: 180px; text-align: center; line-height: 1.3;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.speech-bubble::after {
  content: ''; position: absolute; bottom: -14px; left: 50%; transform: translateX(-50%);
  border: 8px solid transparent; border-top-color: white;
}

/* ─── SCENE LIST ─── */
.scene-list-title { font-size: 0.85rem; font-weight: 800; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.08em; }
.scene-thumb {
  border-radius: 10px; cursor: pointer; overflow: hidden; position: relative;
  border: 2px solid var(--card-border); aspect-ratio: 16/9; transition: border-color 0.2s;
}
.scene-thumb.active { border-color: var(--teal); box-shadow: var(--shadow-glow-teal); }
.scene-thumb:hover { border-color: var(--purple-light); }
.scene-thumb-inner { width: 100%; height: 100%; transform: scale(0.25); transform-origin: top left;
  width: 400%; height: 400%; pointer-events: none; }
.scene-num { position: absolute; bottom: 4px; right: 6px; font-size: 0.7rem; font-weight: 800;
  color: rgba(255,255,255,0.8); text-shadow: 0 1px 3px rgba(0,0,0,0.6); }
.scene-delete {
  position: absolute; top: 4px; right: 4px; width: 20px; height: 20px;
  background: rgba(255,107,157,0.8); border: none; border-radius: 50%; color: white;
  font-size: 0.65rem; cursor: pointer; display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.2s;
}
.scene-thumb:hover .scene-delete { opacity: 1; }

/* ─── MUSIC SELECTOR ─── */
.music-options { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.music-btn {
  padding: 0.35rem 0.8rem; border-radius: 20px; font-size: 0.8rem; font-weight: 700;
  cursor: pointer; border: 1px solid var(--card-border); color: var(--text-muted);
  background: transparent; font-family: 'Nunito', sans-serif; transition: all 0.2s;
}
.music-btn.active { background: var(--yellow); color: var(--navy); border-color: var(--yellow); }

/* ─── PLAYBACK MODAL ─── */
.playback-overlay {
  position: fixed; inset: 0; z-index: 500; background: #000;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.4s;
}
.playback-overlay.open { opacity: 1; pointer-events: all; }
.playback-scene {
  width: 100%; max-width: 960px; aspect-ratio: 16/9;
  position: relative; overflow: hidden; border-radius: 16px;
  box-shadow: 0 0 80px rgba(123,47,190,0.4);
}
.playback-controls {
  margin-top: 1.5rem; display: flex; gap: 1rem; align-items: center;
}
.playback-counter { font-size: 0.9rem; color: rgba(255,255,255,0.5); font-weight: 600; }
.fade-transition { animation: sceneFade 0.6s ease forwards; }
@keyframes sceneFade { from{opacity:0;transform:scale(0.97)} to{opacity:1;transform:scale(1)} }

/* ─── TEXT INPUT ─── */
.text-input-row { display: flex; gap: 0.5rem; margin-top: 0.5rem; }
.studio-text-input {
  flex: 1; padding: 0.5rem 0.75rem; background: rgba(255,255,255,0.07);
  border: 1px solid var(--card-border); border-radius: 10px; color: var(--white);
  font-family: 'Nunito', sans-serif; font-size: 0.9rem; outline: none;
}
.studio-text-input:focus { border-color: var(--teal); }

/* ─── BADGE ─── */
.badge-wrap { text-align: center; padding: 2rem; }
.badge-emoji { font-size: 6rem; display: block; animation: badgePop 0.7s var(--transition) forwards; }
@keyframes badgePop { 0%{transform:scale(0) rotate(-20deg)} 70%{transform:scale(1.2) rotate(5deg)} 100%{transform:scale(1) rotate(0)} }
.badge-wrap h2 { font-size: 1.8rem; font-weight: 900; margin: 1rem 0 0.5rem;
  background: linear-gradient(135deg, var(--yellow), var(--orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* ─── LANDING PAGE CARD ─── */
.game-card-ai { --glow: rgba(0,212,170,0.3); }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .studio-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto 1fr auto auto;
  }
  .studio-sidebar-left, .studio-sidebar-right {
    border: none; border-bottom: 1px solid var(--card-border);
    max-height: 140px;
  }
  .studio-sidebar-right { grid-row: 5; max-height: 120px; }
  .topics-grid { grid-template-columns: 1fr 1fr; gap: 1rem; padding: 1rem; }
}
@media (max-width: 560px) {
  .topics-grid { grid-template-columns: 1fr; }
  .portal-buttons { flex-direction: column; align-items: center; }
  .hub-header { padding: 0.75rem 1rem; }
}