:root {
  --bg: #f4f6ff;
  --bg-strong: #eef2ff;
  --panel: rgba(255, 255, 255, 0.9);
  --card: rgba(255, 255, 255, 0.96);
  --primary: #5b4bff;
  --primary-dark: #4338ca;
  --primary-soft: #ece9ff;
  --text: #1f2937;
  --text-soft: #64748b;
  --danger: #ef4444;
  --danger-soft: #fee2e2;
  --warning: #f59e0b;
  --warning-soft: #fff1d6;
  --success: #10b981;
  --success-soft: #d1fae5;
  --border: rgba(148, 163, 184, 0.22);
  --shadow: 0 18px 40px rgba(91, 75, 255, 0.12);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: linear-gradient(180deg, var(--bg-strong), var(--bg));
  color: var(--text);
  font-family: "Noto Sans TC", "Segoe UI", sans-serif;
}

body {
  padding: 0;
}

button, input, select, textarea {
  font: inherit;
}

#app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 92px;
}

.app-header {
  background: linear-gradient(135deg, rgba(91, 75, 255, 0.96), rgba(124, 58, 237, 0.85));
  border-radius: 28px;
  padding: 28px 26px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.app-header::after {
  content: "";
  position: absolute;
  inset: auto -30px -40px auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.app-header h1 {
  margin: 0;
  font-size: clamp(2rem, 1.6rem + 1vw, 3rem);
  letter-spacing: 0.04em;
  color: #fff;
}

.subtitle {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.tab-nav {
  display: flex;
  gap: 12px;
  margin-top: 22px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid var(--border);
  border-radius: 18px;
  backdrop-filter: blur(8px);
}

.tab-btn, .sub-tab {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 14px;
  background: transparent;
  color: var(--text-soft);
  font-weight: 700;
  padding: 13px 18px;
  cursor: pointer;
  transition: all 0.2s ease;
  flex: 1;
}

.tab-btn.active, .sub-tab.active {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  box-shadow: 0 10px 22px rgba(91, 75, 255, 0.24);
}

.tab-content {
  display: none;
  margin-top: 22px;
}

.tab-content.active {
  display: block;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.04);
}

.stat-card.danger {
  background: linear-gradient(180deg, #fff7f7, #fff);
}

.stat-card.warning {
  background: linear-gradient(180deg, #fffaf0, #fff);
}

.stat-card.safe {
  background: linear-gradient(180deg, #f0fdf7, #fff);
}

.stat-num {
  font-size: clamp(1.9rem, 1.2rem + 1vw, 2.5rem);
  font-weight: 800;
  color: var(--text);
}

.stat-card.danger .stat-num { color: var(--danger); }
.stat-card.warning .stat-num { color: var(--warning); }
.stat-card.safe .stat-num { color: var(--success); }

.stat-label {
  color: var(--text-soft);
  font-weight: 600;
}

.filter-bar {
  display: flex;
  gap: 12px;
  margin: 18px 0 20px;
}

.filter-bar select,
input, select, textarea {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  padding: 12px 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.filter-bar select {
  flex: 1;
  min-height: 46px;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: rgba(91, 75, 255, 0.6);
  box-shadow: 0 0 0 4px rgba(91, 75, 255, 0.12);
}

.card-list {
  display: grid;
  gap: 16px;
}

.product-card, .checklist-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.97), rgba(248,250,252,0.95));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 18px 18px 16px;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover, .checklist-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 28px rgba(15, 23, 42, 0.08);
}

.product-card.warning {
  border-left: 5px solid var(--warning);
}

.product-card.expired {
  border-left: 5px solid var(--danger);
}

.product-card.safe {
  border-left: 5px solid var(--success);
}

.product-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.product-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text);
}

.product-badge {
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
}

.badge-food { background: #dcfce7; color: #166534; }
.badge-skincare { background: #fce7f3; color: #9d174d; }
.badge-medicine { background: #e0f2fe; color: #075985; }
.badge-anniversary { background: #fef3c7; color: #92400e; }
.badge-other { background: #e2e8f0; color: #334155; }

.product-desc {
  margin-top: 10px;
  color: var(--text-soft);
  line-height: 1.6;
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.btn-sm {
  border: none;
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.btn-edit { background: var(--primary-soft); color: var(--primary-dark); }
.btn-use { background: #dbeafe; color: #1d4ed8; }
.btn-delete { background: var(--danger-soft); color: #b91c1c; }

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.days-left {
  font-weight: 800;
  font-size: 0.95rem;
}

.days-left.warning { color: var(--warning); }
.days-left.expired { color: var(--danger); }
.days-left.safe { color: var(--success); }

.expiry-date {
  color: var(--text-soft);
  font-size: 0.85rem;
}

.reminder-tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: #e0e7ff;
  color: var(--primary-dark);
  margin: 8px 6px 0 0;
  font-weight: 600;
}

.reminder-tag.warning { background: var(--warning-soft); color: #b45309; }
.reminder-tag.expired { background: var(--danger-soft); color: #b91c1c; }

.repeat-badge {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--text-soft);
  margin-left: 6px;
  vertical-align: middle;
}

.small-label {
  font-size: 0.78rem;
  color: var(--text-soft);
  font-weight: 600;
}

.remind-days {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: #f8fafc;
  border: 1px solid var(--border);
}

.remind-days input[type="number"] {
  width: 90px;
  min-width: 90px;
}

.custom-date-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.custom-date-row input[type="date"] {
  flex: 1;
}

.custom-date-row input[type="text"] {
  flex: 1.2;
}

.custom-date-row .btn-remove {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: none;
  background: var(--danger-soft);
  color: #b91c1c;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
}

.btn-add-row {
  width: 100%;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px dashed rgba(91, 75, 255, 0.5);
  background: rgba(91, 75, 255, 0.04);
  color: var(--primary);
  font-weight: 700;
  cursor: pointer;
  margin-top: 6px;
}

.checklist-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.sub-content {
  display: none;
}

.sub-content.active {
  display: block;
}

.checklist-card {
  cursor: pointer;
}

.checklist-card h4 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.checklist-meta {
  color: var(--text-soft);
  font-size: 0.82rem;
}

.checklist-progress {
  height: 8px;
  margin-top: 12px;
  background: #eef2ff;
  border-radius: 999px;
  overflow: hidden;
}

.checklist-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), #34d399);
  border-radius: inherit;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-soft);
  border: 1px dashed var(--border);
  border-radius: 18px;
  background: rgba(255,255,255,0.5);
}

.empty-state .emoji {
  font-size: 2.4rem;
  margin-bottom: 8px;
}

.fab {
  position: fixed;
  right: 26px;
  bottom: 28px;
  width: 64px;
  height: 64px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  font-size: 2rem;
  box-shadow: 0 18px 28px rgba(91, 75, 255, 0.35);
  cursor: pointer;
  z-index: 30;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 40;
}

.modal.show {
  display: flex;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
}

.modal-content {
  position: relative;
  z-index: 1;
  width: min(560px, calc(100vw - 24px));
  max-height: 90vh;
  overflow: auto;
  background: rgba(255,255,255,0.98);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 28px;
  box-shadow: 0 30px 60px rgba(15, 23, 42, 0.2);
  padding: 24px 22px 18px;
}

.modal-content h3 {
  margin: 0 0 16px;
  font-size: clamp(1.4rem, 1rem + 0.7vw, 2rem);
}

label {
  display: block;
  margin-top: 16px;
  margin-bottom: 8px;
  font-weight: 700;
  color: var(--text);
}

input, select, textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 22px;
}

.btn-primary, .btn-secondary, .btn-danger {
  border: none;
  border-radius: 12px;
  padding: 11px 18px;
  font-weight: 800;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
}

.btn-secondary {
  background: #eef2ff;
  color: var(--primary-dark);
}

.btn-danger {
  background: var(--danger-soft);
  color: #b91c1c;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 10px;
  border-radius: 12px;
  background: #f8fafc;
  border: 1px solid var(--border);
  margin-top: 10px;
  cursor: pointer;
}

.checklist-item.checked {
  background: #f0fdf7;
  border-color: rgba(16, 185, 129, 0.2);
}

.checklist-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--success);
  margin: 0;
}

.checklist-item span {
  flex: 1;
  line-height: 1.5;
}

.checklist-item.checked span {
  color: var(--text-soft);
  text-decoration: line-through;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%);
  background: rgba(17, 24, 39, 0.88);
  color: #fff;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  z-index: 50;
  box-shadow: 0 16px 32px rgba(17, 24, 39, 0.18);
}

@media (max-width: 760px) {
  #app {
    padding-inline: 14px;
  }

  .stats-row,
  .filter-bar,
  .checklist-tabs {
    grid-template-columns: 1fr;
    display: grid;
  }

  .filter-bar {
    gap: 10px;
  }

  .tab-nav {
    flex-direction: column;
  }

  .product-header,
  .product-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .modal {
    padding: 12px;
  }

  .modal-content {
    padding: 18px 16px 14px;
  }

  .fab {
    width: 58px;
    height: 58px;
    right: 18px;
    bottom: 20px;
  }
}

/* 設定按鈕（修改密碼） */
.settings-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 1;
  border: none;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  font-size: 1.15rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
}
.settings-btn:hover { background: rgba(255, 255, 255, 0.3); }