:root {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-input: #f1f5f9;
  --text: #0f172a;
  --text-secondary: #64748b;
  --accent: #6366f1;
  --accent-light: #e0e7ff;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --session: #0ea5e9;
  --session-light: #e0f2fe;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.12);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #334155;
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #818cf8;
    --accent-light: #1e1b4b;
    --border: #334155;
    --danger-light: #450a0a;
    --session-light: #0c4a6e;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.4);
  }
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  -webkit-text-size-adjust: 100%;
}

/* --- Auth screen --- */
#auth-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px;
  gap: 16px;
}

#auth-screen h1 { font-size: 28px; }
#auth-screen p { color: var(--text-secondary); text-align: center; }

#token-input {
  width: 100%;
  max-width: 360px;
  padding: 14px 16px;
  font-size: 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text);
  outline: none;
}

#token-input:focus { border-color: var(--accent); }

#token-submit {
  width: 100%;
  max-width: 360px;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

#token-error {
  color: var(--danger);
  font-size: 14px;
  display: none;
}

/* --- Main app --- */
#app { display: none; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

header h1 {
  font-size: 20px;
  font-weight: 700;
}

header nav { display: flex; gap: 8px; }

header nav button {
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 500;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

header nav button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

main { padding: 16px 20px 140px; max-width: 600px; margin: 0 auto; }

/* --- Section headings --- */
.section-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin: 20px 0 10px;
}

.section-title:first-child { margin-top: 0; }

/* --- Next Up cards --- */
.status-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-card .icon { font-size: 28px; flex-shrink: 0; }

.status-card .info { flex: 1; min-width: 0; }

.status-card .info .label {
  font-weight: 600;
  font-size: 16px;
}

.status-card .info .detail {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.status-card.overdue {
  border-color: var(--danger);
  background: var(--danger-light);
}

.status-card.overdue .info .label { color: var(--danger); }

.status-card.in-progress {
  border-color: var(--session);
  background: var(--session-light);
}

.status-card.in-progress .info .label { color: var(--session); }

.status-card .end-btn {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  background: var(--session);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}

/* --- Recent list --- */
.recent-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}

.recent-item:last-child { border-bottom: none; }

.recent-item .time {
  font-size: 13px;
  color: var(--text-secondary);
  min-width: 60px;
  flex-shrink: 0;
}

.recent-item .icon { font-size: 18px; }

.recent-item .desc {
  font-size: 14px;
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.recent-item .who {
  font-size: 12px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

/* --- Quick-log bar --- */
.quick-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  padding-bottom: max(12px, env(safe-area-inset-bottom));
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  z-index: 10;
}

.quick-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 14px;
  min-width: 68px;
  font-size: 12px;
  font-weight: 600;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  transition: transform 0.1s;
}

.quick-btn:active { transform: scale(0.95); }

.quick-btn .btn-icon { font-size: 22px; }

.quick-btn.session-active {
  background: var(--session);
  color: #fff;
  border-color: var(--session);
}

/* --- Compact time rows --- */
.compact-time-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.compact-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 36px;
  flex-shrink: 0;
  text-align: right;
  margin-right: 2px;
}

.compact-end-inner {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.time-digit {
  width: 46px;
  padding: 8px 4px;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text);
  outline: none;
  -moz-appearance: textfield;
  cursor: ns-resize;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.time-digit::-webkit-inner-spin-button,
.time-digit::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.time-digit:focus {
  border-color: var(--accent);
}

.time-colon {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-secondary);
  margin: 0 -1px;
}

.ampm-toggle {
  padding: 8px 10px;
  font-size: 13px;
  font-weight: 700;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  margin-left: 4px;
  min-width: 40px;
  text-align: center;
}

.date-trigger-wrap {
  position: relative;
  display: inline-block;
  margin-left: auto;
  flex-shrink: 0;
}

.date-toggle {
  display: inline-block;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 16px;
  cursor: pointer;
}

.date-hidden-input {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  -webkit-appearance: none;
}

/* --- End mode tabs --- */
.end-mode-tabs {
  display: flex;
  gap: 0;
  margin-left: auto;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

.end-tab {
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 700;
  background: var(--bg-input);
  color: var(--text-secondary);
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  min-width: 38px;
  text-align: center;
}

.end-tab.active {
  background: var(--accent);
  color: #fff;
}

/* --- Inline fields row --- */
.inline-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}

.inline-field {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

/* Push side picker to the right when it's the first visible child */
.inline-field#modal-side-field {
  margin-left: auto;
}

.modal .inline-field input[type="number"] {
  width: 56px;
  padding: 8px 6px;
  text-align: center;
  border: 1px dashed var(--border);
}

.modal .inline-field input[type="text"] {
  width: 100%;
  min-width: 60px;
  padding: 8px 10px;
  font-size: 14px;
  border: 1px dashed var(--border);
}

.inline-unit {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* --- Who picker --- */
.who-picker {
  display: flex;
  gap: 4px;
}

.who-btn {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg-input);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.who-btn.selected {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* --- Sub-type picker (B-Milk / Formula) --- */
#modal-subtype-field {
  margin-bottom: 14px;
}

.subtype-picker {
  display: flex;
  gap: 0;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  width: 100%;
}

.subtype-btn {
  flex: 1;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 700;
  background: var(--bg-input);
  color: var(--text);
  border: none;
  border-right: 1px solid var(--border);
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.subtype-btn:last-child {
  border-right: none;
}

.subtype-btn.selected {
  background: var(--accent);
  color: #fff;
}

/* --- Side picker --- */
.side-picker {
  display: flex;
  gap: 0;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.side-btn {
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg-input);
  color: var(--text);
  border: none;
  border-right: 1px solid var(--border);
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.side-btn:last-child {
  border-right: none;
}

.side-btn.selected {
  background: var(--accent);
  color: #fff;
}

/* --- Toast --- */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  z-index: 100;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  text-align: center;
  max-width: 90%;
}

.toast.show { opacity: 1; }

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 50;
  display: none;
  align-items: flex-end;
  justify-content: center;
}

.modal-overlay.show { display: flex; }

.modal {
  background: var(--bg-card);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 20px 20px;
  padding-bottom: max(20px, env(safe-area-inset-bottom));
  width: 100%;
  max-width: 600px;
  max-height: 80dvh;
  overflow-y: auto;
}

.modal-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}

.modal-top-row h2 {
  font-size: 17px;
  margin: 0;
  white-space: nowrap;
}

.modal-top-row .who-picker {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.modal .field { margin-bottom: 10px; }

.modal label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 3px;
}

.modal input, .modal textarea {
  width: 100%;
  padding: 8px 10px;
  font-size: 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text);
  outline: none;
}

.modal input.time-digit {
  width: 46px;
  padding: 8px 4px;
  font-size: 22px;
  flex-shrink: 0;
}

.modal #modal-duration.time-digit {
  width: 52px;
}

.dur-unit {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.modal input:focus, .modal textarea:focus { border-color: var(--accent); }

.modal .actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.modal .actions button {
  flex: 1;
  padding: 13px 8px;
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.modal .btn-primary { background: var(--accent); color: #fff; }
.modal .btn-secondary { background: var(--bg-input); color: var(--text); border: 1px solid var(--border); }
.modal .btn-danger { background: var(--danger); color: #fff; }

/* --- History view --- */
#history-view { display: none; }

.history-filters {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 12px;
  -webkit-overflow-scrolling: touch;
}

.filter-btn {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.filter-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.day-group h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 12px 0 6px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.load-more {
  display: block;
  width: 100%;
  padding: 12px;
  font-size: 14px;
  font-weight: 500;
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  margin-top: 12px;
}

/* --- Empty state --- */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.empty-state .big-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 15px; }