@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  --font: 'Plus Jakarta Sans', sans-serif;

  --bg: #f0f2f8;
  --surface: #ffffff;
  --surface-2: #f7f8fc;
  --border: rgba(0,0,0,0.07);

  --primary: #5b4fcf;
  --primary-light: #7c72e0;
  --primary-dark: #3d33a0;
  --primary-bg: #ede9ff;

  --smoke: #ff6b4a;
  --smoke-light: #ff8c70;
  --smoke-bg: #fff2ee;
  --smoke-grad: linear-gradient(135deg, #ff6b4a 0%, #ff4081 100%);

  --water: #2196f3;
  --water-light: #42a5f5;
  --water-bg: #e3f2fd;
  --water-grad: linear-gradient(135deg, #2196f3 0%, #00bcd4 100%);

  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;

  --text-1: #1a1a2e;
  --text-2: #4a4a6a;
  --text-3: #8a8aaa;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.14);
  --shadow-primary: 0 8px 24px rgba(91,79,207,0.28);
  --shadow-smoke: 0 8px 24px rgba(255,107,74,0.28);
  --shadow-water: 0 8px 24px rgba(33,150,243,0.28);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --nav-height: 72px;
  --header-height: 60px;

  --transition: 0.2s ease;
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; height: 100%; overflow: hidden; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-1);
  height: 100dvh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── Scrollbar ─────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ─── Utility ───────────────────────────────────────── */
.hidden { display: none !important; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.text-center { text-align: center; }
.w-full { width: 100%; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }

/* ─── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover { filter: brightness(1.08); }

.btn-smoke {
  background: var(--smoke-grad);
  color: #fff;
  box-shadow: var(--shadow-smoke);
}
.btn-water {
  background: var(--water-grad);
  color: #fff;
  box-shadow: var(--shadow-water);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary-bg); }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  padding: 8px 12px;
}
.btn-ghost:hover { background: var(--surface-2); }

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-sm { padding: 8px 16px; font-size: 0.8125rem; }
.btn-lg { padding: 16px 32px; font-size: 1rem; }
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  flex-shrink: 0;
}
.btn-icon-lg {
  width: 56px;
  height: 56px;
  padding: 0;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ─── Inputs ────────────────────────────────────────── */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.input-group label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.02em;
}
.input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-size: 0.9375rem;
  color: var(--text-1);
  background: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(91,79,207,0.12); }
.input::placeholder { color: var(--text-3); }

select.input { appearance: none; cursor: pointer; }

/* ─── Cards ─────────────────────────────────────────── */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

/* ─── PIN Dots ──────────────────────────────────────── */
.pin-dots {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin: 10px 0;
}
.pin-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  transition: background var(--transition);
}
.pin-dot.filled { background: var(--primary); }

.pin-keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 8px auto 0;
  max-width: 210px;
}
.pin-key {
  aspect-ratio: 1;
  border: none;
  border-radius: 50%;
  background: var(--surface-2);
  font-family: var(--font);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-1);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}
.pin-key:active { transform: scale(0.92); background: var(--primary-bg); color: var(--primary); }

/* ─── Auth section visibility (CSS fallback for cached JS) ── */
.auth-body:has(#pin-section:not(.hidden)) #user-select-section,
.auth-body:has(#pin-section:not(.hidden)) #new-here-section,
.auth-body:has(#register-section:not(.hidden)) #user-select-section,
.auth-body:has(#register-section:not(.hidden)) #new-here-section { display: none; }

/* ─── Auth Screen ───────────────────────────────────── */
#auth-screen {
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(160deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  overflow: hidden;
}

.auth-header {
  padding: 22px 24px 14px;
  text-align: center;
  flex-shrink: 0;
}
.auth-logo {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  box-shadow: var(--shadow-primary);
}
.auth-logo svg { width: 26px; height: 26px; }
.auth-title {
  font-size: 1.375rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}
.auth-subtitle {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

.auth-body {
  flex: 1;
  min-height: 0;
  background: var(--bg);
  border-radius: 28px 28px 0 0;
  padding: 20px 16px 20px;
  overflow-y: auto;
}

.user-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.user-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 8px;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
  -webkit-tap-highlight-color: transparent;
}
.user-tile:hover, .user-tile.selected { border-color: var(--primary); background: var(--primary-bg); }
.user-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
}
.user-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-1);
  text-align: center;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--text-3);
  font-size: 0.8125rem;
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ─── App Shell ─────────────────────────────────────── */
#app-screen { display: none; height: 100dvh; flex-direction: column; overflow: hidden; }
#app-screen.active { display: flex; }

.app-header {
  height: var(--header-height);
  flex-shrink: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.header-user {
  display: flex;
  align-items: center;
  gap: 10px;
}
.header-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
}
.header-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-1);
}
.header-date {
  font-size: 0.75rem;
  color: var(--text-3);
}

.app-content {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-bottom: 16px;
}

/* ─── Bottom Nav ────────────────────────────────────── */
.bottom-nav {
  flex-shrink: 0;
  height: var(--nav-height);
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 0 8px;
  z-index: 200;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
}
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
  border: none;
  background: transparent;
}
.nav-item svg { transition: all var(--transition); }
.nav-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-3);
  transition: color var(--transition);
}
.nav-item.active .nav-label { color: var(--primary); }
.nav-item.active svg { color: var(--primary); }
.nav-icon { color: var(--text-3); }

/* ─── Tabs ──────────────────────────────────────────── */
.tab-pane { display: none; padding: 20px; }
.tab-pane.active { display: block; }

/* ─── Home Tab ──────────────────────────────────────── */
.date-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.date-nav-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: var(--surface-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.date-nav-btn:active { background: var(--primary-bg); color: var(--primary); }
.date-nav-btn:disabled { opacity: 0.3; }
.date-display { text-align: center; }
.date-main { font-size: 1.0625rem; font-weight: 700; color: var(--text-1); }
.date-sub { font-size: 0.75rem; color: var(--text-3); margin-top: 2px; }

/* Tracking card shared */
.track-card {
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}
.track-card-smoke {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.track-card-water {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.track-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}
.track-card-title-group { display: flex; align-items: center; gap: 10px; }
.track-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.track-icon-smoke { background: var(--smoke-bg); }
.track-icon-water { background: var(--water-bg); }
.track-icon svg { width: 22px; height: 22px; }

.track-title { font-size: 1rem; font-weight: 700; color: var(--text-1); }
.track-subtitle { font-size: 0.8125rem; color: var(--text-3); margin-top: 2px; }

.track-count-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 12px;
}
.track-count {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text-1);
}
.track-count-smoke { color: var(--smoke); }
.track-count-water { color: var(--water); }
.track-count-unit { font-size: 0.9375rem; color: var(--text-3); font-weight: 500; }
.track-goal { font-size: 0.875rem; color: var(--text-3); margin-left: 4px; }

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--surface-2);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 12px;
}
.progress-fill {
  height: 100%;
  border-radius: 99px;
  transition: width 0.5s ease;
}
.progress-fill-smoke { background: var(--smoke-grad); }
.progress-fill-water { background: var(--water-grad); }

.elapsed-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--smoke-bg);
  color: var(--smoke);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 99px;
  margin-bottom: 14px;
}
.elapsed-badge-water {
  background: var(--water-bg);
  color: var(--water);
}

.track-actions { display: flex; gap: 10px; align-items: center; }

.fab-smoke {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--smoke-grad);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: var(--shadow-smoke);
  transition: all var(--transition);
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.fab-smoke:active { transform: scale(0.93); }

.fab-water {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--water-grad);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: var(--shadow-water);
  transition: all var(--transition);
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.fab-water:active { transform: scale(0.93); }

.btn-manual {
  flex: 1;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.btn-manual:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-bg); }

/* ─── Tracking Tab ──────────────────────────────────── */
.section-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 14px;
}

.entry-list { display: flex; flex-direction: column; gap: 10px; }
.entry-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.entry-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.entry-icon-smoke { background: var(--smoke-bg); }
.entry-icon-water { background: var(--water-bg); }

.entry-info { flex: 1; min-width: 0; }
.entry-time { font-size: 0.9375rem; font-weight: 600; color: var(--text-1); }
.entry-meta { font-size: 0.8125rem; color: var(--text-3); margin-top: 2px; }

.entry-actions { display: flex; gap: 6px; }
.entry-action-btn {
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 50%;
  background: var(--surface-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.entry-action-btn:hover { background: var(--primary-bg); color: var(--primary); }
.entry-action-btn.delete:hover { background: #fef2f2; color: var(--danger); }

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-3);
}
.empty-state svg { opacity: 0.3; margin-bottom: 12px; }
.empty-state p { font-size: 0.9375rem; font-weight: 500; }

/* ─── Analysis Tab ──────────────────────────────────── */
.period-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}
.period-btn {
  flex: 1;
  padding: 10px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.period-btn.active { border-color: var(--primary); background: var(--primary-bg); color: var(--primary); }

.chart-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.chart-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.chart-container { position: relative; height: 200px; }

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.stat-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.stat-label { font-size: 0.75rem; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.04em; }
.stat-value { font-size: 1.5rem; font-weight: 800; color: var(--text-1); margin-top: 4px; }
.stat-value-smoke { color: var(--smoke); }
.stat-value-water { color: var(--water); }
.stat-sub { font-size: 0.75rem; color: var(--text-3); margin-top: 2px; }

/* ─── Settings Tab ──────────────────────────────────── */
.settings-section { margin-bottom: 28px; }
.settings-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.settings-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 8px;
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.settings-item:hover { background: var(--surface-2); }
.settings-item-left { display: flex; align-items: center; gap: 12px; }
.settings-item-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.settings-item-text { }
.settings-item-label { font-size: 0.9375rem; font-weight: 600; color: var(--text-1); }
.settings-item-desc { font-size: 0.8125rem; color: var(--text-3); margin-top: 2px; }

/* Calendar */
.calendar {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.calendar-month { font-size: 1rem; font-weight: 700; color: var(--text-1); }
.cal-nav-btn {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: var(--surface-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.cal-nav-btn:hover { background: var(--primary-bg); color: var(--primary); }
.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  margin-bottom: 8px;
}
.weekday { font-size: 0.6875rem; font-weight: 700; color: var(--text-3); text-transform: uppercase; padding: 4px; }
.calendar-days { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-day {
  aspect-ratio: 1;
  border: none;
  border-radius: 50%;
  background: transparent;
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  position: relative;
  -webkit-tap-highlight-color: transparent;
}
.cal-day:hover { background: var(--primary-bg); color: var(--primary); }
.cal-day.other-month { color: var(--text-3); }
.cal-day.today { font-weight: 800; color: var(--primary); }
.cal-day.selected { background: var(--primary); color: #fff; }
.cal-day.has-goal::after {
  content: '';
  position: absolute;
  bottom: 3px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--success);
}
.cal-day.selected.has-goal::after { background: rgba(255,255,255,0.7); }

/* ─── Modals ────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal-sheet {
  width: 100%;
  background: var(--surface);
  border-radius: 28px 28px 0 0;
  padding: 20px 24px 40px;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
  max-height: 90dvh;
  overflow-y: auto;
}
.modal-overlay.open .modal-sheet { transform: translateY(0); }

.modal-handle {
  width: 40px;
  height: 4px;
  border-radius: 99px;
  background: var(--border);
  margin: 0 auto 20px;
}
.modal-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-1);
  margin-bottom: 20px;
}

/* Time picker */
.time-picker-row {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin: 16px 0;
}
.time-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.time-spinner-btn {
  width: 40px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: var(--surface-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.time-spinner-btn:active { background: var(--primary-bg); color: var(--primary); }
.time-spinner-val {
  width: 56px;
  text-align: center;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-1);
  padding: 8px 0;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
}
.time-sep { font-size: 1.5rem; font-weight: 800; color: var(--text-3); }

.ampm-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ampm-btn {
  padding: 8px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.ampm-btn.active { border-color: var(--primary); background: var(--primary-bg); color: var(--primary); }

/* Water amount selector */
.water-quick-btns,
.water-quick-btns-q {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}
.water-quick-btn,
.water-qk-btn {
  padding: 12px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  -webkit-tap-highlight-color: transparent;
}
.water-quick-btn.active,
.water-qk-btn.active { border-color: var(--water); background: var(--water-bg); color: var(--water); }

/* Toast */
.toast-container {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  background: var(--text-1);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.25s ease, toastOut 0.25s ease 2.5s forwards;
  white-space: nowrap;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

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

/* ─── Responsive tweaks ─────────────────────────────── */
@media (min-width: 480px) {
  .tab-pane { padding: 24px; }
  .auth-body { padding: 32px 32px 40px; }
}

@media (min-width: 768px) {
  body { max-width: 480px; margin: 0 auto; }
  #auth-screen { max-width: 480px; margin: 0 auto; }
  .toast-container { top: 80px; }
}

/* Loading spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

/* Segment control */
.segment-control {
  display: flex;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 3px;
  margin-bottom: 16px;
}
.segment-btn {
  flex: 1;
  padding: 8px;
  border: none;
  border-radius: 7px;
  background: transparent;
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-3);
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.segment-btn.active { background: var(--surface); color: var(--text-1); box-shadow: var(--shadow-sm); }