/* ===================== CSS Variables ===================== */
:root {
  --coral: #FF6F61;
  --coral-dark: #E85A4F;
  --coral-light: #FF8A85;
  --danger: #EF4444;
  --warning: #F59E0B;
  --success: #10B981;
  --info: #3B82F6;
  --slate-900: #1E293B;
  --slate-800: #283548;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748B;
  --slate-400: #94A3B8;
  --slate-300: #CBD5E1;
  --slate-200: #E2E8F0;
  --slate-100: #F1F5F9;
  --slate-50: #F8FAFC;
}

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

body {
  font-family: 'Noto Sans SC', sans-serif;
  background: #fff;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===================== Scrollbar ===================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--slate-100); }
::-webkit-scrollbar-thumb { background: var(--coral); border-radius: 3px; }

/* ===================== Header ===================== */
.header-shimmer {
  background: linear-gradient(90deg, var(--slate-900) 0%, var(--slate-800) 25%, var(--slate-900) 50%, var(--slate-800) 75%, var(--slate-900) 100%);
  background-size: 200% 100%;
  animation: shimmer 8s ease infinite;
}

.dot-pattern {
  background-image: radial-gradient(circle, var(--slate-300) 1px, transparent 1px);
  background-size: 20px 20px;
}

/* ===================== Animations ===================== */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 5px rgba(16, 185, 129, 0.5); }
  50% { box-shadow: 0 0 20px rgba(16, 185, 129, 0.8), 0 0 40px rgba(16, 185, 129, 0.3); }
}

@keyframes pulse-danger {
  0%, 100% { box-shadow: 0 0 5px rgba(239, 68, 68, 0.5); }
  50% { box-shadow: 0 0 20px rgba(239, 68, 68, 0.8), 0 0 40px rgba(239, 68, 68, 0.3); }
}

@keyframes pulse-warning {
  0%, 100% { box-shadow: 0 0 5px rgba(245, 158, 11, 0.5); }
  50% { box-shadow: 0 0 20px rgba(245, 158, 11, 0.8), 0 0 40px rgba(245, 158, 11, 0.3); }
}

@keyframes blink-warning {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

@keyframes blink-danger {
  0%, 100% { opacity: 1; background-color: rgba(239, 68, 68, 0.1); }
  50% { opacity: 0.5; background-color: rgba(239, 68, 68, 0.3); }
}

@keyframes scan-line {
  0% { top: 0; }
  100% { top: 100%; }
}

@keyframes checkmark {
  0% { transform: scale(0) rotate(45deg); opacity: 0; }
  50% { transform: scale(1.3) rotate(45deg); opacity: 1; }
  100% { transform: scale(1) rotate(45deg); opacity: 1; }
}

@keyframes progress-fill {
  from { width: 0; }
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 10px rgba(16, 185, 129, 0.3); }
  50% { box-shadow: 0 0 30px rgba(16, 185, 129, 0.6), 0 0 60px rgba(16, 185, 129, 0.2); }
}

@keyframes breathe-green {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

@keyframes breathe-yellow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

@keyframes breathe-red {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

@keyframes zone-overlay-fadein {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes timeline-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 111, 97, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(255, 111, 97, 0); }
}

@keyframes countdown-ring {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: 283; }
}

/* ===================== Tab Navigation ===================== */
.tab-btn {
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--coral);
  transition: all 0.3s ease;
  transform: translateX(-50%);
  border-radius: 2px;
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--coral), var(--coral-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(255, 111, 97, 0.4);
}

.tab-btn.active::after { width: 60%; }

.tab-content {
  display: none;
  animation: fadeIn 0.5s ease forwards;
}

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

/* ===================== Monitor View ===================== */
.monitor-container {
  position: relative;
  background: #0f172a;
  border-radius: 12px;
  overflow: hidden;
  min-height: 420px;
}

.monitor-container img,
.monitor-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.monitor-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* Zone overlay boxes */
.zone-box {
  position: absolute;
  border: 2px dashed;
  border-radius: 6px;
  opacity: 0;
  animation: zone-overlay-fadein 0.8s ease forwards;
  transition: all 0.3s ease;
}

.zone-box.conflict {
  animation: blink-warning 0.8s ease-in-out infinite;
}

.zone-box.danger-conflict {
  animation: blink-danger 0.5s ease-in-out infinite;
}

.zone-label {
  position: absolute;
  top: -22px;
  left: 4px;
  padding: 2px 8px;
  border-radius: 4px 4px 0 0;
  font-size: 11px;
  font-weight: 600;
  color: white;
  white-space: nowrap;
}

/* ===================== Checklist ===================== */
.checklist-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1.5px solid var(--slate-200);
  background: var(--slate-50);
  cursor: pointer;
  transition: all 0.3s ease;
  user-select: none;
}

.checklist-stack {
  position: relative;
  padding-top: 8px;
}

.checklist-stack .checklist-item {
  position: relative;
  margin-top: -10px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.checklist-stack .checklist-item:first-child {
  margin-top: 0;
}

.checklist-stack .checklist-item.checked {
  transform: translateX(8px) translateY(-1px);
  z-index: 2;
}

.checklist-stack .checklist-item.stacked-active {
  z-index: 3;
}

.checklist-item:hover {
  border-color: var(--coral-light);
  background: #fff5f4;
}

.checklist-item.checked {
  border-color: var(--success);
  background: #ecfdf5;
}

.checklist-checkbox {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  border: 2px solid var(--slate-300);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.checklist-item.checked .checklist-checkbox {
  background: var(--success);
  border-color: var(--success);
}

.checklist-checkbox .check-icon {
  color: white;
  font-size: 14px;
  opacity: 0;
  transform: scale(0);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.checklist-item.checked .checklist-checkbox .check-icon {
  opacity: 1;
  transform: scale(1);
}

/* Progress bar */
.progress-bar-track {
  width: 100%;
  height: 8px;
  background: var(--slate-200);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--coral), var(--success));
  border-radius: 4px;
  transition: width 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Activate button */
.btn-activate {
  padding: 14px 40px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  border: none;
  cursor: not-allowed;
  background: var(--slate-200);
  color: var(--slate-400);
  transition: all 0.5s ease;
}

.btn-activate.start {
  background: linear-gradient(135deg, var(--coral), #e05252);
  color: white;
  cursor: pointer;
  animation: glow-pulse 2s ease-in-out infinite;
}

.btn-activate.start:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
}

.btn-activate.enabled {
  background: linear-gradient(135deg, var(--success), #059669);
  color: white;
  cursor: pointer;
  animation: glow-pulse 2s ease-in-out infinite;
}

.btn-activate.enabled:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

/* ===================== Sensors ===================== */
.sensor-card {
  padding: 16px;
  border-radius: 12px;
  border: 1.5px solid var(--slate-200);
  background: white;
  cursor: pointer;
  transition: all 0.3s ease;
}

.sensor-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  border-color: var(--coral);
}

.sensor-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.sensor-indicator.normal {
  background: var(--success);
  animation: breathe-green 2s ease-in-out infinite;
}

.sensor-indicator.warning {
  background: var(--warning);
  animation: breathe-yellow 1.5s ease-in-out infinite;
}

.sensor-indicator.danger {
  background: var(--danger);
  animation: breathe-red 1s ease-in-out infinite;
}

/* ===================== Modal ===================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

.modal-content {
  max-width: 90vw;
  max-height: 90vh;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

/* ===================== Timeline ===================== */
.timeline-container {
  position: relative;
  padding: 20px 0;
}

.timeline-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--slate-200);
  transform: translateY(-50%);
}

.timeline-line-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--coral), var(--success));
  width: 0;
  transition: width 1s ease;
  border-radius: 2px;
}

.timeline-node {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0.4;
  transition: all 0.5s ease;
}

.timeline-node.active {
  opacity: 1;
}

.timeline-node.completed {
  opacity: 1;
}

.timeline-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--slate-300);
  border: 3px solid white;
  box-shadow: 0 0 0 2px var(--slate-300);
  transition: all 0.5s ease;
}

.timeline-node.active .timeline-dot {
  background: var(--coral);
  box-shadow: 0 0 0 2px var(--coral);
  animation: timeline-pulse 2s ease-in-out infinite;
}

.timeline-node.completed .timeline-dot {
  background: var(--success);
  box-shadow: 0 0 0 2px var(--success);
}

/* ===================== Countdown ===================== */
.countdown-circle {
  position: relative;
  width: 80px;
  height: 80px;
}

.countdown-circle svg {
  transform: rotate(-90deg);
}

.countdown-circle .ring-bg {
  fill: none;
  stroke: var(--slate-200);
  stroke-width: 6;
}

.countdown-circle .ring-fill {
  fill: none;
  stroke: var(--coral);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear;
}

.countdown-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--slate-700);
}

/* ===================== Conflict Level Indicators ===================== */
.conflict-indicator {
  padding: 10px 16px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.conflict-indicator.level-yellow {
  background: #fef3c7;
  border: 1px solid #fbbf24;
  color: #92400e;
}

.conflict-indicator.level-orange {
  background: #ffedd5;
  border: 1px solid #fb923c;
  color: #9a3412;
}

.conflict-indicator.level-red {
  background: #fee2e2;
  border: 1px solid #f87171;
  color: #991b1b;
}

.conflict-indicator.level-red.flashing {
  animation: blink-danger 0.8s ease-in-out infinite;
}

.conflict-light {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.conflict-light.yellow {
  background: var(--warning);
  animation: breathe-yellow 1s ease-in-out infinite;
}

.conflict-light.orange {
  background: #fb923c;
  animation: breathe-yellow 0.8s ease-in-out infinite;
}

.conflict-light.red {
  background: var(--danger);
  animation: breathe-red 0.5s ease-in-out infinite;
}

/* ===================== Warning Level ===================== */
.warning-level-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
}

.warning-level-item.level-warning {
  background: #fef3c7;
  color: #92400e;
}

.warning-level-item.level-alarm {
  background: #fef9c3;
  color: #854d0e;
}

.warning-level-item.level-emergency {
  background: #fee2e2;
  color: #991b1b;
}

/* ===================== Checklist Carousel ===================== */
.checklist-carousel {
  position: relative;
  min-height: 56px;
}

.checklist-carousel .checklist-item {
  position: absolute;
  width: 100%;
  left: 0;
  top: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.checklist-all-done {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px;
  color: #059669;
  font-weight: 600;
  font-size: 14px;
}

/* ===================== Utility ===================== */
.animate-in { animation: fadeInUp 0.7s ease forwards; }
.animate-left { animation: fadeInLeft 0.7s ease forwards; }
.animate-right { animation: fadeInRight 0.7s ease forwards; }
.delay-100 { animation-delay: 0.15s; opacity: 0; }
.delay-200 { animation-delay: 0.3s; opacity: 0; }
.delay-300 { animation-delay: 0.45s; opacity: 0; }

.info-card {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.info-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(255, 111, 97, 0.15);
}

.status-bar {
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  transition: all 0.5s ease;
}

.status-bar.safe {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.status-bar.checking {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fbbf24;
  animation: pulse-glow 1.5s ease-in-out infinite;
}

.status-bar.ready {
  background: linear-gradient(135deg, #ecfdf5, #d1fae5);
  color: #065f46;
  border: 1px solid #34d399;
  animation: pulse-glow 2s ease-in-out infinite;
}

.status-strip {
  display: flex;
  align-items: center;
  gap: 12px;
}

.conflict-result-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.conflict-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.conflict-detail-block {
  border-radius: 10px;
  padding: 12px;
  font-size: 12px;
  line-height: 1.6;
}

.conflict-detail-block ul {
  margin: 0;
  padding-left: 16px;
}

.conflict-detail-block.red {
  background: #fff1f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
}

.conflict-detail-block.amber {
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #b45309;
}

/* Philosophy text */
.philosophy-text {
  background: linear-gradient(135deg, #fff5f4, #fff1f0);
  border-left: 4px solid var(--coral);
  padding: 20px 24px;
  border-radius: 0 12px 12px 0;
}

/* Scan overlay */
.scan-overlay {
  position: relative;
  overflow: hidden;
}

.scan-overlay::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--coral), var(--coral-light), var(--coral), transparent);
  box-shadow: 0 0 20px var(--coral), 0 0 40px var(--coral);
  animation: scan-line 3s ease-in-out infinite;
}