/* style.css — Storm Chaser Academy */
:root {
  --bg-top: #0d1b2a;
  --bg-mid: #1b3a5b;
  --bg-bot: #2a5c8a;
  --card: rgba(255,255,255,0.07);
  --card-border: rgba(255,255,255,0.14);
  --card-hover: rgba(255,255,255,0.12);
  --text: #eaf2fb;
  --text-dim: #8ea4be;
  --accent: #4fc3f7;
  --accent2: #66bb6a;
  --warn: #ffa726;
  --danger: #ef5350;
  --correct-bg: rgba(76,175,80,0.2);
  --correct-border: #66bb6a;
  --wrong-bg: rgba(239,83,80,0.2);
  --wrong-border: #ef5350;
  --btn-bg: rgba(255,255,255,0.1);
  --btn-hover: rgba(255,255,255,0.18);
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --font-display: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color-scheme: dark;
}

html[data-theme="light"] {
  --bg-top: #6bb6e3;
  --bg-mid: #8ec5e8;
  --bg-bot: #c5e3f5;
  --card: rgba(255,255,255,0.65);
  --card-border: rgba(0,0,0,0.08);
  --card-hover: rgba(255,255,255,0.85);
  --text: #1a2a3a;
  --text-dim: #5a6a7a;
  --btn-bg: rgba(255,255,255,0.6);
  --btn-hover: rgba(255,255,255,0.9);
  --shadow: 0 4px 20px rgba(0,0,0,0.12);
  color-scheme: light;
}

@media (prefers-color-scheme: light) {
  html:not([data-theme="dark"]) {
    --bg-top: #6bb6e3;
    --bg-mid: #8ec5e8;
    --bg-bot: #c5e3f5;
    --card: rgba(255,255,255,0.65);
    --card-border: rgba(0,0,0,0.08);
    --card-hover: rgba(255,255,255,0.85);
    --text: #1a2a3a;
    --text-dim: #5a6a7a;
    --btn-bg: rgba(255,255,255,0.6);
    --btn-hover: rgba(255,255,255,0.9);
    --shadow: 0 4px 20px rgba(0,0,0,0.12);
    color-scheme: light;
  }
}

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

html, body {
  height: 100%;
  overflow: hidden;
  touch-action: manipulation;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 50%, var(--bg-bot) 100%);
  color: var(--text);
  transition: background 0.4s;
}

#app {
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* Background clouds */
#bg-clouds {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
#bg-clouds::before, #bg-clouds::after {
  content: '';
  position: absolute;
  width: 200px; height: 60px;
  background: rgba(255,255,255,0.06);
  border-radius: 50px;
  filter: blur(20px);
  animation: drift 40s linear infinite;
}
#bg-clouds::before { top: 15%; left: -200px; animation-duration: 50s; }
#bg-clouds::after { top: 55%; left: -200px; animation-duration: 65s; animation-delay: -20s; width: 300px; }

@keyframes drift {
  from { transform: translateX(0); }
  to { transform: translateX(calc(100vw + 300px)); }
}

/* Top bar */
#topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(0,0,0,0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  z-index: 10;
  flex-shrink: 0;
}

#title {
  flex: 1;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.icon-btn {
  width: 38px; height: 38px;
  border: 1px solid var(--card-border);
  background: var(--btn-bg);
  color: var(--text);
  border-radius: 10px;
  font-size: 1.2rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.1s;
  flex-shrink: 0;
}
.icon-btn:hover { background: var(--btn-hover); }
.icon-btn:active { transform: scale(0.92); }

#score-badge {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background: linear-gradient(135deg, #ffa726, #ff7043);
  border-radius: 20px;
  font-weight: 800;
  font-size: 0.9rem;
  color: #fff;
  box-shadow: 0 2px 8px rgba(255,112,67,0.3);
  flex-shrink: 0;
}
#score-badge .score-label { font-size: 0.7rem; opacity: 0.85; }

/* Main screen */
#screen {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  z-index: 1;
  -webkit-overflow-scrolling: touch;
}
#screen::-webkit-scrollbar { width: 6px; }
#screen::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 3px; }

/* Home */
.home-wrap {
  padding: 20px 16px 24px;
  max-width: 640px;
  margin: 0 auto;
}

.hero {
  text-align: center;
  margin-bottom: 24px;
  padding-top: 8px;
}

.hero-badge {
  display: inline-block;
  padding: 8px 24px;
  background: linear-gradient(135deg, var(--accent), #26c6da);
  color: #fff;
  border-radius: 24px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  box-shadow: 0 4px 16px rgba(79,195,247,0.3);
  margin-bottom: 10px;
}

.hero-sub {
  color: var(--text-dim);
  font-size: 0.95rem;
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.5;
}

.mode-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 560px) {
  .mode-grid { grid-template-columns: 1fr 1fr; }
}

.mode-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, border-color 0.2s;
  text-align: left;
  color: var(--text);
  position: relative;
  overflow: hidden;
}
.mode-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--card-color);
}
.mode-card:hover {
  background: var(--card-hover);
  transform: translateY(-2px);
  border-color: var(--card-color);
}
.mode-card:active { transform: translateY(0); }

.mode-icon {
  width: 56px; height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
  border-radius: 14px;
  flex-shrink: 0;
}
.mode-icon svg { width: 40px; height: 32px; }

.mode-info { flex: 1; min-width: 0; }
.mode-info h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 3px;
}
.mode-info p {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.35;
  margin-bottom: 8px;
}

.mode-progress {
  display: flex;
  align-items: center;
  gap: 8px;
}
.progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #66bb6a);
  border-radius: 3px;
  transition: width 0.4s;
}
.mode-score {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  white-space: nowrap;
}

.check-badge {
  position: absolute;
  top: 12px; right: 12px;
  width: 24px; height: 24px;
  background: var(--accent2);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
}

.fact-bar {
  margin-top: 24px;
  padding: 14px 18px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.fact-label {
  font-weight: 800;
  color: var(--accent);
  font-size: 0.85rem;
  white-space: nowrap;
}
.fact-text {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.45;
}

/* Quiz wrap */
.quiz-wrap {
  padding: 16px 16px 28px;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.quiz-header {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.quiz-header .progress-bar { flex: 1; min-width: 80px; }
.q-counter {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-dim);
}
.streak-badge {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--warn);
  background: rgba(255,167,38,0.15);
  padding: 3px 10px;
  border-radius: 12px;
}

.q-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 14px;
  line-height: 1.4;
}

.q-subtext {
  font-size: 0.9rem;
  color: var(--text-dim);
  text-align: center;
  margin-bottom: 14px;
}

#cloud-canvas, #tornado-canvas, #front-sym {
  border-radius: 14px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  max-width: 100%;
  height: auto;
}

.answer-grid {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

@media (max-width: 380px) {
  .answer-grid { grid-template-columns: 1fr; }
}

.answer-btn {
  padding: 14px 12px;
  background: var(--btn-bg);
  border: 2px solid var(--card-border);
  border-radius: 12px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.1s;
  text-align: center;
  line-height: 1.3;
}
.answer-btn:hover:not(:disabled) {
  background: var(--btn-hover);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.answer-btn:active:not(:disabled) { transform: translateY(0); }
.answer-btn:disabled { cursor: default; opacity: 0.7; }
.answer-btn.correct {
  background: var(--correct-bg);
  border-color: var(--correct-border);
  color: var(--correct-border);
  opacity: 1;
}
.answer-btn.wrong {
  background: var(--wrong-bg);
  border-color: var(--wrong-border);
  color: var(--wrong-border);
  opacity: 1;
}

.explain-box {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.result {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.result-correct { color: var(--correct-border); }
.result-wrong { color: var(--wrong-border); }

.explain-box h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--accent);
}

.cloud-desc {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.cloud-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tag {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  background: rgba(79,195,247,0.15);
  border-radius: 10px;
  color: var(--accent);
}

.next-btn {
  margin-top: 14px;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--accent), #26c6da);
  color: #fff;
  border: none;
  border-radius: 24px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(79,195,247,0.3);
}
.next-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(79,195,247,0.4); }
.next-btn:active { transform: translateY(0); }

/* Learn screens */
.learn-wrap {
  padding: 16px 16px 28px;
  max-width: 600px;
  margin: 0 auto;
}

.learn-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 10px;
}

.learn-intro {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-dim);
  margin-bottom: 20px;
}
.learn-intro strong { color: var(--text); }

.front-diagrams {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 20px;
}
@media (min-width: 560px) {
  .front-diagrams { grid-template-columns: 1fr 1fr; }
}

.front-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 16px;
  text-align: center;
}
.front-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.front-card canvas {
  border-radius: 10px;
  max-width: 100%;
  height: auto;
  margin-bottom: 12px;
}

.front-facts {
  list-style: none;
  text-align: left;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-dim);
}
.front-facts li {
  padding: 4px 0 4px 18px;
  position: relative;
}
.front-facts li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 800;
}
.front-facts strong { color: var(--text); }

.front-extra {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 20px;
}
.front-extra h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.mini-fronts { display: flex; flex-direction: column; gap: 10px; }
.mini-front { display: flex; gap: 12px; align-items: center; }
.mini-front canvas { border-radius: 8px; flex-shrink: 0; }
.mini-front p { font-size: 0.82rem; line-height: 1.45; color: var(--text-dim); }
.mini-front strong { color: var(--text); }

.start-quiz-btn {
  display: block;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent2), #43a047);
  color: #fff;
  border: none;
  border-radius: 14px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(102,187,106,0.3);
}
.start-quiz-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(102,187,106,0.4); }
.start-quiz-btn:active { transform: translateY(0); }

/* EF Scale */
.ef-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  justify-content: center;
}
.ef-tab {
  padding: 8px 14px;
  background: var(--btn-bg);
  border: 2px solid var(--card-border);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}
.ef-tab:hover { background: var(--btn-hover); }
.ef-tab.active {
  background: var(--ef-color);
  border-color: var(--ef-color);
  color: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

#tornado-canvas {
  width: 100%;
  max-width: 320px;
  border-radius: 14px;
  box-shadow: var(--shadow);
  margin: 0 auto 16px;
  display: block;
}

.ef-info {
  background: var(--card);
  border: 2px solid;
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 20px;
}
.ef-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  color: #fff;
}
.ef-level {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
}
.ef-wind {
  font-size: 0.95rem;
  font-weight: 800;
}
.ef-damage {
  padding: 14px 16px;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-dim);
}

/* Forecast station */
.station-card {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 16px;
}
.station-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
  text-align: center;
}
.station-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.station-item {
  background: rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.station-wide { grid-column: 1 / -1; }
.station-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.station-val {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text);
}

/* Complete screen */
.complete-wrap {
  padding: 32px 20px;
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
}
.trophy {
  font-size: 4rem;
  margin-bottom: 12px;
  animation: bounce 1s ease infinite alternate;
}
@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-10px); }
}
.complete-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #ffd54f, #ffa726);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.complete-sub {
  font-size: 0.95rem;
  color: var(--text-dim);
  margin-bottom: 24px;
  line-height: 1.5;
}
.complete-stats {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.stat {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px 20px;
  min-width: 100px;
}
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 600;
}
.complete-badge {
  display: inline-block;
  padding: 10px 28px;
  background: linear-gradient(135deg, #9c27b0, #6a1b9a);
  color: #fff;
  border-radius: 24px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  box-shadow: 0 4px 16px rgba(156,39,176,0.3);
}
.complete-fact {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 24px;
}

/* Responsive */
@media (max-width: 380px) {
  #title { font-size: 0.95rem; }
  .hero-badge { font-size: 0.95rem; padding: 6px 18px; }
  .q-text { font-size: 1rem; }
  .answer-btn { font-size: 0.85rem; padding: 12px 8px; }
}