/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #07071a;
  --bg2: #0d0d24;
  --card: rgba(16,16,42,0.92);
  --card-border: rgba(120,120,255,0.15);
  --gold: #e8c547;
  --gold-dim: rgba(232,197,71,0.15);
  --blue: #5b8dee;
  --red: #e74c5a;
  --green: #27c97a;
  --green-dim: rgba(39,201,122,0.15);
  --purple: #a855f7;
  --text: #e8e8f4;
  --text2: #7a7a9e;
  --text3: #4a4a6e;
  --skin: #f5d0a0;
  --suit: #14143a;
  --radius: 20px;
  --shadow: 0 24px 64px rgba(0,0,0,0.6);
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* ===== ANIMATED BACKGROUND ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 20%, rgba(91,141,238,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(168,85,247,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 50% 50%, rgba(232,197,71,0.03) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ===== PARTICLES ===== */
#particles { position: fixed; inset: 0; pointer-events: none; z-index: 1; overflow: hidden; }
.particle {
  position: absolute;
  width: 2px; height: 2px;
  background: var(--gold);
  border-radius: 50%;
  animation: float linear infinite;
  opacity: 0;
}
@keyframes float {
  0%   { transform: translateY(100vh) translateX(0); opacity: 0; }
  10%  { opacity: 0.6; }
  90%  { opacity: 0.3; }
  100% { transform: translateY(-20px) translateX(30px); opacity: 0; }
}

/* ===== MAIN LAYOUT ===== */
#app {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 16px 40px;
}

/* ===== HEADER ===== */
header {
  width: 100%;
  max-width: 680px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  margin-bottom: 8px;
}

.logo {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text2);
  text-transform: uppercase;
}
.logo span { color: var(--gold); }

.header-right { display: flex; align-items: center; gap: 12px; }

.streak-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(232,197,71,0.1);
  border: 1px solid rgba(232,197,71,0.3);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 700;
  color: var(--gold);
  animation: streakPulse 2s ease-in-out infinite;
}
.streak-badge .fire { font-size: 16px; animation: fireWiggle 0.8s ease-in-out infinite alternate; }
@keyframes streakPulse { 0%,100% { box-shadow: 0 0 0 0 rgba(232,197,71,0.2); } 50% { box-shadow: 0 0 0 6px rgba(232,197,71,0); } }
@keyframes fireWiggle { from { transform: rotate(-10deg); } to { transform: rotate(10deg); } }

.day-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 5px 12px;
}

.time-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(91,141,238,0.08);
  border: 1px solid rgba(91,141,238,0.2);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--blue);
}

/* ===== TEACHER SECTION ===== */
.teacher-section {
  width: 100%;
  max-width: 680px;
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 20px;
  min-height: 100px;
}

.teacher-avatar-wrap {
  flex-shrink: 0;
  width: 80px;
  height: 100px;
  position: relative;
}

#teacher-svg {
  width: 100%;
  height: 100%;
  animation: breathe 4s ease-in-out infinite;
  filter: drop-shadow(0 8px 20px rgba(91,141,238,0.25));
  transition: all 0.4s ease;
}
@keyframes breathe {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-4px); }
}

.teacher-avatar-wrap.stern #teacher-svg { animation: sternShake 0.5s ease-in-out; filter: drop-shadow(0 8px 20px rgba(231,76,90,0.4)); }
.teacher-avatar-wrap.happy #teacher-svg { animation: happyBounce 0.6s ease; filter: drop-shadow(0 8px 20px rgba(39,201,122,0.4)); }
@keyframes sternShake {
  0%,100% { transform: translateX(0); }
  20% { transform: translateX(-4px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(3px); }
}
@keyframes happyBounce {
  0%,100% { transform: translateY(0); }
  30% { transform: translateY(-10px); }
  60% { transform: translateY(-4px); }
}

.speech-bubble {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px 16px 16px 4px;
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  position: relative;
  backdrop-filter: blur(12px);
  min-height: 60px;
  display: flex;
  align-items: center;
}
.speech-bubble::before {
  content: '';
  position: absolute;
  left: -8px; bottom: 14px;
  border: 8px solid transparent;
  border-right-color: var(--card-border);
}
.speech-bubble::after {
  content: '';
  position: absolute;
  left: -6px; bottom: 15px;
  border: 7px solid transparent;
  border-right-color: var(--card);
}
.speech-bubble .cursor {
  display: inline-block;
  width: 2px; height: 1em;
  background: var(--gold);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 0.8s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ===== TASK CARD ===== */
.task-card {
  width: 100%;
  max-width: 680px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
  animation: cardIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(40px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.task-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--task-color, var(--gold));
  opacity: 0.8;
}

/* Task type colors */
.task-card[data-type="anki"]    { --task-color: #a855f7; }
.task-card[data-type="video"]   { --task-color: #e74c5a; }
.task-card[data-type="reading"] { --task-color: #5b8dee; }
.task-card[data-type="grammar"] { --task-color: #e8c547; }
.task-card[data-type="speaking"]{ --task-color: #27c97a; }

.task-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.task-type-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--task-color, var(--gold));
}
.task-type-badge .icon { font-size: 14px; }

.task-duration {
  margin-left: auto;
  font-size: 12px;
  color: var(--text2);
  display: flex;
  align-items: center;
  gap: 4px;
}

.task-title {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--text);
}

.task-instruction {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text2);
  margin-bottom: 28px;
  white-space: pre-line;
}

/* ===== RESOURCE BUTTON ===== */
.resource-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 14px 20px;
  background: rgba(91,141,238,0.08);
  border: 1px solid rgba(91,141,238,0.25);
  border-radius: 12px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 10px;
  position: relative;
  overflow: hidden;
}
.resource-btn:hover {
  background: rgba(91,141,238,0.15);
  border-color: rgba(91,141,238,0.4);
  transform: translateY(-1px);
}
.resource-btn.clicked {
  background: var(--green-dim);
  border-color: rgba(39,201,122,0.35);
  color: var(--green);
}
.resource-btn .ext-icon { margin-left: auto; font-size: 12px; opacity: 0.6; }
.resource-btn .check-mark { margin-left: auto; font-size: 14px; }

/* ===== DONE BUTTON ===== */
.done-btn {
  width: 100%;
  padding: 18px;
  margin-top: 20px;
  background: linear-gradient(135deg, var(--gold) 0%, #f0a500 100%);
  border: none;
  border-radius: 14px;
  color: #0a0a0a;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}
.done-btn:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(232,197,71,0.35);
}
.done-btn:not(:disabled):active { transform: translateY(0); }
.done-btn:disabled {
  background: rgba(255,255,255,0.06);
  color: var(--text3);
  cursor: not-allowed;
  box-shadow: none;
}
.done-btn:not(:disabled)::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
  transform: translateX(-100%);
  animation: shimmer 2s infinite;
}
@keyframes shimmer { to { transform: translateX(100%); } }

.done-btn-hint {
  text-align: center;
  font-size: 11px;
  color: var(--text3);
  margin-top: 8px;
}

/* ===== PROGRESS DOTS ===== */
.progress-section {
  width: 100%;
  max-width: 680px;
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.task-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--text3);
  transition: all 0.3s ease;
}
.dot.done { background: var(--green); box-shadow: 0 0 8px rgba(39,201,122,0.5); }
.dot.active { background: var(--gold); box-shadow: 0 0 8px rgba(232,197,71,0.5); width: 24px; border-radius: 5px; }

.progress-bar-wrap {
  height: 4px;
  background: rgba(255,255,255,0.05);
  border-radius: 2px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--purple));
  border-radius: 2px;
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.progress-label {
  text-align: center;
  font-size: 12px;
  color: var(--text3);
}

/* ===== SCREENS ===== */
.screen {
  width: 100%;
  max-width: 680px;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.screen.active { display: flex; }

/* ===== WELCOME SCREEN ===== */
.welcome-screen {
  text-align: center;
  padding: 40px 20px;
}
.welcome-screen h1 {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--gold), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.welcome-screen p {
  font-size: 16px;
  color: var(--text2);
  line-height: 1.7;
  max-width: 460px;
  margin: 0 auto 32px;
}
.start-btn {
  padding: 16px 48px;
  background: linear-gradient(135deg, var(--gold), #f0a500);
  border: none;
  border-radius: 14px;
  color: #0a0a0a;
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.25s ease;
}
.start-btn:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(232,197,71,0.3); }

/* ===== COMPLETION SCREEN ===== */
.completion-screen {
  text-align: center;
  padding: 20px;
  animation: cardIn 0.5s ease;
}
.completion-emoji { font-size: 64px; margin-bottom: 16px; animation: popIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); }
@keyframes popIn { from { transform: scale(0); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.completion-screen h2 { font-size: 28px; font-weight: 900; margin-bottom: 8px; color: var(--gold); }
.completion-screen p { font-size: 15px; color: var(--text2); line-height: 1.7; margin-bottom: 20px; }
.stats-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin: 20px 0;
  flex-wrap: wrap;
}
.stat-box {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px 20px;
  min-width: 100px;
  text-align: center;
}
.stat-box .stat-num { font-size: 26px; font-weight: 900; color: var(--gold); display: block; }
.stat-box .stat-label { font-size: 11px; color: var(--text2); text-transform: uppercase; letter-spacing: 0.05em; }

/* ===== LOCKED SCREEN ===== */
.locked-screen { text-align: center; padding: 40px 20px; }
.locked-screen h2 { font-size: 24px; font-weight: 800; margin-bottom: 8px; color: var(--text2); }
.locked-screen p { font-size: 14px; color: var(--text3); }
.locked-icon { font-size: 56px; margin-bottom: 16px; opacity: 0.5; }
.next-day-time {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 14px 24px;
  font-size: 20px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 0.05em;
  margin-top: 16px;
}

/* ===== CATCHUP BANNER ===== */
.catchup-banner {
  width: 100%;
  max-width: 680px;
  background: rgba(231,76,90,0.1);
  border: 1px solid rgba(231,76,90,0.3);
  border-radius: 12px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--red);
  margin-bottom: 4px;
}
.catchup-banner strong { color: #ff6b78; }

/* ===== STERN MESSAGE OVERLAY ===== */
.stern-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(6px);
  animation: fadeIn 0.2s ease;
  cursor: pointer;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.stern-message-box {
  background: var(--card);
  border: 1px solid rgba(231,76,90,0.4);
  border-radius: 20px;
  padding: 32px;
  max-width: 400px;
  text-align: center;
  box-shadow: 0 0 60px rgba(231,76,90,0.2);
  animation: cardIn 0.3s ease;
}
.stern-message-box .stern-emoji { font-size: 48px; display: block; margin-bottom: 16px; }
.stern-message-box p { font-size: 18px; font-weight: 700; color: var(--text); line-height: 1.5; margin-bottom: 8px; }
.stern-message-box small { font-size: 12px; color: var(--text3); }

/* ===== CONFETTI ===== */
.confetti-piece {
  position: fixed;
  width: 10px; height: 10px;
  top: -20px;
  z-index: 200;
  border-radius: 2px;
  animation: confettiFall linear forwards;
  pointer-events: none;
}
@keyframes confettiFall {
  to { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

/* ===== UTILITY ===== */
.hidden { display: none !important; }
.btn-secondary {
  padding: 10px 20px;
  background: transparent;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  color: var(--text2);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-secondary:hover { border-color: var(--text2); color: var(--text); }

/* ===== LOADING ===== */
.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  gap: 16px;
}
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--card-border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== WEEK LABEL ===== */
.week-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--task-color, var(--gold));
  opacity: 0.7;
  margin-bottom: 4px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
  .task-card { padding: 22px 18px; }
  .task-title { font-size: 18px; }
  .teacher-avatar-wrap { width: 60px; height: 80px; }
  header { gap: 8px; }
}