:root {
  --bg: #fef6e4;
  --card: #ffffff;
  --ink: #24222b;
  --ink-soft: #6b6873;
  --accent: #f4845f;
  --accent-dark: #e36a44;
  --good: #4caf7d;
  --bad: #e2574c;
  --border: #f1e3cf;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
}

.screen {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px 18px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hidden { display: none !important; }

h1 {
  font-size: 22px;
  margin: 8px 0 24px;
  text-align: center;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 13px;
  color: var(--ink-soft);
  margin: 12px 0 6px;
}

input[type="text"], input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fffdf9;
  color: var(--ink);
}

button {
  font-family: inherit;
  font-size: 16px;
  border: none;
  border-radius: 10px;
  padding: 13px 16px;
  cursor: pointer;
  touch-action: manipulation;
}

.btn-primary {
  width: 100%;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  margin-top: 18px;
}
.btn-primary:active { background: var(--accent-dark); }

.btn-link {
  background: none;
  color: var(--accent);
  width: 100%;
  margin-top: 10px;
}

.error-msg {
  color: var(--bad);
  font-size: 14px;
  margin-top: 10px;
  min-height: 18px;
}

/* Dashboard */
.stat-row {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}
.stat-box {
  flex: 1;
  background: var(--card);
  border-radius: 14px;
  padding: 14px 10px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}
.stat-box .num {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
}
.stat-box .label {
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 2px;
}

.progress-bar {
  height: 10px;
  background: var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin: 10px 0 4px;
}
.progress-bar > div {
  height: 100%;
  background: var(--accent);
  transition: width .3s ease;
}
.progress-label {
  font-size: 13px;
  color: var(--ink-soft);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}
.topbar .username { font-weight: 600; }
.topbar button {
  background: none;
  color: var(--ink-soft);
  font-size: 13px;
  padding: 6px 10px;
}
.topbar a {
  color: var(--ink-soft);
  font-size: 13px;
  text-decoration: none;
  margin-right: 4px;
}

/* Deck list (home) + deck store */
.deck-card {
  background: var(--card);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}
.deck-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.deck-card-name { font-weight: 600; }
.deck-card-desc {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}
.deck-card .progress-bar { margin: 6px 0 2px; }
.deck-card-meta {
  font-size: 12px;
  color: var(--ink-soft);
}
.btn-small {
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  padding: 7px 14px;
  border-radius: 999px;
}
.btn-small.subscribed {
  background: var(--border);
  color: var(--ink-soft);
}
.empty-hint {
  text-align: center;
  color: var(--ink-soft);
  font-size: 14px;
  margin: 30px 0;
}
.deck-badge {
  background: var(--border);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 12px;
  margin-right: 6px;
}

/* Review card */
.review-header {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}
.new-badge {
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 12px;
}
.prompt-word {
  font-size: 34px;
  font-weight: 700;
  text-align: center;
  margin: 20px 0 6px;
}
.prompt-sub {
  text-align: center;
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 4px;
}
.prompt-example {
  text-align: center;
  color: var(--ink-soft);
  font-size: 14px;
  font-style: italic;
  margin-top: 10px;
}

.options {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}
.option-btn {
  background: #fffdf9;
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  font-size: 17px;
  text-align: left;
}
.option-btn:active { background: var(--border); }
.option-btn.correct { border-color: var(--good); background: #eaf7ef; }
.option-btn.wrong { border-color: var(--bad); background: #fceceb; }

.spelling-input {
  margin-top: 24px;
  text-align: center;
}
.spelling-input input {
  text-align: center;
  font-size: 22px;
  padding: 14px;
}
.spelling-input input.correct { border-color: var(--good); background: #eaf7ef; }
.spelling-input input.wrong { border-color: var(--bad); background: #fceceb; }

.audio-btn {
  background: none;
  border: none;
  font-size: 22px;
  line-height: 1;
  padding: 4px 8px;
  vertical-align: middle;
  cursor: pointer;
}
.audio-btn:active { opacity: 0.5; }

.feedback {
  margin-top: 16px;
  text-align: center;
  font-size: 15px;
  min-height: 22px;
}
.feedback.correct { color: var(--good); font-weight: 600; }
.feedback.wrong { color: var(--bad); font-weight: 600; }

.empty-state {
  text-align: center;
  color: var(--ink-soft);
  margin-top: 60px;
  line-height: 1.8;
}
.empty-state .big { font-size: 40px; }