:root {
  --bg: #0f0f14;
  --bg-card: #1a1a23;
  --bg-card-2: #22222e;
  --accent: #7c5cff;
  --accent-2: #ff6b8b;
  --text: #f2f2f7;
  --text-dim: #9a9aa8;
  --green: #3ddc97;
  --gold: #ffc857;
  --danger: #ff5c5c;
  --radius: 16px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Helvetica Neue", sans-serif;
  overscroll-behavior-y: none;
  height: 100%;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding-bottom: 90px;
  padding-top: env(safe-area-inset-top);
}

.hidden { display: none !important; }

/* ===== Header / status bar ===== */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 18px 8px;
}
.topbar h1 { font-size: 20px; margin: 0; font-weight: 700; }
.level-badge {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-card);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.level-badge .lv-num { color: var(--accent); }

.xp-bar-wrap {
  margin: 0 18px 18px;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.xp-bar-top { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-dim); margin-bottom: 8px; }
.xp-track { height: 10px; background: var(--bg-card-2); border-radius: 999px; overflow: hidden; }
.xp-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .4s ease; }

.streak-row { display: flex; gap: 10px; margin-top: 12px; }
.streak-pill {
  flex: 1; background: var(--bg-card-2); border-radius: 12px; padding: 10px 12px;
  text-align: center;
}
.streak-pill .num { font-size: 20px; font-weight: 800; color: var(--gold); }
.streak-pill .label { font-size: 11px; color: var(--text-dim); }

/* ===== Motivation card ===== */
.motivation-card {
  margin: 0 18px 18px;
  background: linear-gradient(135deg, var(--accent), #4b3ba3);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
}
.motivation-card .cat { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; opacity: .8; }
.motivation-card .quote { font-size: 17px; font-weight: 700; margin-top: 8px; line-height: 1.4; }
.motivation-card .refresh-btn {
  position: absolute; top: 14px; right: 14px;
  background: rgba(255,255,255,.15); border: none; color: white;
  width: 30px; height: 30px; border-radius: 50%; font-size: 14px;
}

/* ===== Section ===== */
.section-title {
  padding: 0 18px; margin: 22px 0 10px; font-size: 15px; font-weight: 700; color: var(--text-dim);
  display: flex; justify-content: space-between; align-items: center;
}
.section-title .add-btn { color: var(--accent); font-size: 22px; line-height: 1; background: none; border: none; }

.quest-list { padding: 0 18px; display: flex; flex-direction: column; gap: 10px; }
.quest-item {
  background: var(--bg-card); border-radius: 14px; padding: 14px 16px;
  display: flex; align-items: center; gap: 12px;
}
.quest-item.done { opacity: .55; }
.quest-check {
  width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid var(--accent); flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
}
.quest-item.done .quest-check { background: var(--green); border-color: var(--green); }
.quest-body { flex: 1; min-width: 0; }
.quest-title { font-size: 15px; font-weight: 600; }
.quest-item.done .quest-title { text-decoration: line-through; }
.quest-meta { font-size: 12px; color: var(--text-dim); margin-top: 2px; }
.quest-xp { font-size: 12px; font-weight: 700; color: var(--gold); white-space: nowrap; }
.quest-del { background: none; border: none; color: var(--text-dim); font-size: 18px; padding: 4px 6px; }

.empty-hint { padding: 20px 18px; color: var(--text-dim); font-size: 13px; text-align: center; }

/* ===== Workout / Exercise ===== */
.exercise-list { padding: 0 18px; display: flex; flex-direction: column; gap: 10px; }
.exercise-card { background: var(--bg-card); border-radius: 14px; padding: 14px 16px; }
.exercise-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.btn-add-set {
  flex-shrink: 0; background: var(--bg-card-2); color: var(--accent); border: none;
  padding: 8px 12px; border-radius: 999px; font-size: 12px; font-weight: 700;
}
.set-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.set-chip {
  background: var(--bg-card-2); color: var(--text); font-size: 11px; font-weight: 600;
  padding: 5px 10px; border-radius: 999px;
}

/* ===== Tools grid ===== */
.tools-grid { padding: 0 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.tool-card {
  background: var(--bg-card); border-radius: 14px; padding: 16px; text-align: left;
  border: none; color: var(--text);
}
.tool-card .icon { font-size: 22px; }
.tool-card .name { font-size: 14px; font-weight: 700; margin-top: 8px; }
.tool-card .desc { font-size: 11px; color: var(--text-dim); margin-top: 2px; }

/* ===== Bottom nav ===== */
.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0;
  max-width: 480px; margin: 0 auto;
  background: rgba(26,26,35,.95); backdrop-filter: blur(20px);
  display: flex; padding: 10px 10px calc(10px + env(safe-area-inset-bottom));
  border-top: 1px solid #2a2a36;
}
.nav-btn {
  flex: 1; background: none; border: none; color: var(--text-dim);
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  font-size: 10px; padding: 6px 0;
}
.nav-btn.active { color: var(--accent); }
.nav-btn .nav-icon { font-size: 20px; }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.6);
  display: flex; align-items: flex-end; z-index: 100;
}
.modal-sheet {
  width: 100%; max-width: 480px; margin: 0 auto;
  background: var(--bg-card); border-radius: 20px 20px 0 0;
  padding: 20px 20px calc(20px + env(safe-area-inset-bottom));
}
.modal-sheet h3 { margin: 0 0 16px; }
.modal-sheet input, .modal-sheet select {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid #333;
  background: var(--bg-card-2); color: var(--text); font-size: 15px; margin-bottom: 12px;
}
.modal-actions { display: flex; gap: 10px; margin-top: 8px; }
.btn {
  flex: 1; padding: 13px; border-radius: 12px; border: none; font-size: 15px; font-weight: 700;
}
.btn-primary { background: var(--accent); color: white; }
.btn-secondary { background: var(--bg-card-2); color: var(--text-dim); }

/* ===== Timer view ===== */
.timer-view { padding: 40px 18px; text-align: center; }
.timer-circle {
  width: 240px; height: 240px; margin: 30px auto; border-radius: 50%;
  border: 8px solid var(--bg-card-2); display: flex; align-items: center; justify-content: center;
  position: relative;
}
.timer-circle .time { font-size: 42px; font-weight: 800; }
.timer-mode-toggle { display: flex; gap: 8px; justify-content: center; margin-bottom: 10px; }
.timer-mode-btn { padding: 8px 16px; border-radius: 999px; border: none; background: var(--bg-card-2); color: var(--text-dim); font-size: 13px; font-weight: 600; }
.timer-mode-btn.active { background: var(--accent); color: white; }
.timer-controls { display: flex; gap: 12px; justify-content: center; margin-top: 20px; }
.timer-controls .btn { flex: none; padding: 14px 30px; }

/* ===== Auth ===== */
.auth-view { padding: 60px 24px; text-align: center; }
.auth-view h1 { font-size: 26px; }
.auth-view p { color: var(--text-dim); font-size: 14px; margin-bottom: 30px; }
.auth-view input { width: 100%; padding: 14px; border-radius: 12px; border: 1px solid #333; background: var(--bg-card); color: var(--text); margin-bottom: 12px; font-size: 15px; }
.auth-msg { font-size: 13px; color: var(--accent-2); margin-top: 10px; min-height: 18px; }
.offline-hint { font-size: 12px; color: var(--text-dim); margin-top: 24px; }