:root {
  --bg-color: #121212;
  --surface-color: #1e1e1e;
  --surface-hover: #2c2c2c;
  --primary-color: #00e676;
  --primary-dark: #00b25c;
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --danger-color: #ff5252;
  --divider-color: #333333;
  
  /* Tag Colors */
  --tag-door: #e91e63;
  --tag-propulsion: #2196f3;
  --tag-brake: #ff9800;
  --tag-hvac: #00bcd4;
  --tag-siv: #9c27b0;
  --tag-signal: #8bc34a;
  --tag-body: #795548;
  --tag-project: #ffc107;
  --tag-alert: #f44336;
  --tag-default: #607d8b;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  padding-top: 60px;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background-color: var(--surface-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 16px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.5);
  z-index: 100;
}

.header-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-color);
}

.header-actions button {
  background: none;
  border: none;
  color: var(--text-primary);
  margin-left: 16px;
  cursor: pointer;
  padding: 8px;
}

/* Search Bar */
.search-container {
  padding: 12px 16px;
  background-color: var(--bg-color);
  position: sticky;
  top: 60px;
  z-index: 90;
  border-bottom: 1px solid var(--divider-color);
}

.search-box {
  display: flex;
  align-items: center;
  background-color: var(--surface-color);
  border-radius: 8px;
  padding: 8px 12px;
  gap: 8px;
}

.search-box input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
}

.search-box input::placeholder {
  color: var(--text-secondary);
}

.search-box button {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
}

.filter-tags {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.filter-tags::-webkit-scrollbar {
  display: none;
}

.tag-btn {
  background-color: var(--surface-color);
  color: var(--text-secondary);
  border: 1px solid var(--divider-color);
  border-radius: 16px;
  padding: 6px 12px;
  font-size: 0.85rem;
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.2s;
}

.tag-btn.active {
  background-color: var(--primary-color);
  color: var(--bg-color);
  border-color: var(--primary-color);
  font-weight: bold;
}

/* Timeline */
#timeline-container {
  padding: 16px;
  padding-bottom: 90px;
}

.date-group {
  margin-bottom: 24px;
}

.date-header {
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 12px;
  position: sticky;
  top: 128px;
  background-color: rgba(18, 18, 18, 0.9);
  padding: 4px 0;
  backdrop-filter: blur(4px);
  z-index: 80;
}

.record-card {
  background-color: var(--surface-color);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  position: relative;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.1s;
}

.record-card:active {
  transform: scale(0.98);
}

.card-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.card-time {
  font-weight: bold;
  color: var(--text-primary);
  background-color: var(--divider-color);
  padding: 2px 8px;
  border-radius: 4px;
}

.card-content {
  font-size: 1.05rem;
  line-height: 1.5;
  margin-bottom: 12px;
  white-space: pre-wrap;
}

mark {
  background-color: rgba(255, 235, 59, 0.8);
  color: #000;
  padding: 0 4px;
  border-radius: 4px;
  font-weight: bold;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 4px;
  font-weight: bold;
  color: #fff;
}

/* Tag Color Mappings */
.tag-車門 { background-color: var(--tag-door); }
.tag-推進 { background-color: var(--tag-propulsion); }
.tag-煞車 { background-color: var(--tag-brake); }
.tag-空調 { background-color: var(--tag-hvac); }
.tag-SIV { background-color: var(--tag-siv); }
.tag-號誌 { background-color: var(--tag-signal); }
.tag-車體 { background-color: var(--tag-body); }
.tag-專案 { background-color: var(--tag-project); color: #000; }
.tag-通報 { background-color: var(--tag-alert); }
.tag-car { background-color: #424242; border: 1px solid #666; }

/* FAB */
.fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 28px;
  background-color: var(--primary-color);
  color: var(--bg-color);
  border: none;
  box-shadow: 0 6px 12px rgba(0, 230, 118, 0.3);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  z-index: 100;
  transition: transform 0.2s;
}

.fab:active {
  transform: scale(0.9);
}

/* Modal / Bottom Sheet */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0,0,0,0.6);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.bottom-sheet {
  width: 100%;
  background-color: var(--surface-color);
  border-radius: 20px 20px 0 0;
  padding: 20px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1);
}

.modal-overlay.active .bottom-sheet {
  transform: translateY(0);
}

.sheet-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.sheet-header button {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 8px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group.row {
  display: flex;
  gap: 12px;
}

.form-group.row .half {
  flex: 1;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input, .form-group textarea {
  width: 100%;
  background-color: var(--bg-color);
  border: 1px solid var(--divider-color);
  color: var(--text-primary);
  padding: 12px;
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--primary-color);
}

/* Shift Buttons */
.shift-toggle {
  display: flex;
  background-color: var(--bg-color);
  border-radius: 8px;
  border: 1px solid var(--divider-color);
  overflow: hidden;
}

.shift-btn {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  transition: 0.2s;
}

.shift-btn.active {
  background-color: var(--primary-color);
  color: var(--bg-color);
  font-weight: bold;
}

/* Task Blocks */
.task-block {
  background-color: #252525;
  border: 1px solid var(--divider-color);
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  position: relative;
}

.task-block h4 {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-remove-task {
  background: none;
  border: none;
  color: var(--danger-color);
  cursor: pointer;
  padding: 4px;
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px dashed var(--primary-color);
  padding: 12px;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: 0.2s;
}

.btn-secondary:active {
  background-color: rgba(0, 230, 118, 0.1);
}

/* Chips */
.quick-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  background-color: var(--bg-color);
  border: 1px solid var(--divider-color);
  padding: 6px 12px;
  border-radius: 16px;
  font-size: 0.85rem;
  cursor: pointer;
}

.chip.active {
  background-color: var(--primary-color);
  color: var(--bg-color);
  border-color: var(--primary-color);
}

.sheet-footer {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.sheet-footer button {
  flex: 1;
  padding: 14px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--bg-color);
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
  flex: 0 0 auto !important;
}

/* IO Modal */
.io-card {
  background-color: var(--bg-color);
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.io-card h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: var(--primary-color);
}

.io-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

hr {
  border: none;
  border-top: 1px solid var(--divider-color);
  margin: 20px 0;
}