/* CSS Variables and Design System */
:root {
  --font-title: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;

  /* Vibrant Tournament Palette (Dark Mode Base) */
  --bg-app: #060813;
  --bg-panel: rgba(16, 20, 38, 0.7);
  --bg-panel-border: rgba(255, 255, 255, 0.08);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --primary: #10b981; /* Safe Emerald */
  --primary-hover: #059669;
  --primary-glow: rgba(16, 185, 129, 0.2);
  --accent: #3b82f6; /* Transit Blue */
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.2);
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #10b981;

  --shadow-lg: 0 10px 40px -10px rgba(0, 0, 0, 0.6);
  --glass-blur: blur(16px);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  --max-width: 1440px;
}

[data-theme="light"] {
  --bg-app: #f0f4f9;
  --bg-panel: rgba(255, 255, 255, 0.85);
  --bg-panel-border: rgba(0, 0, 0, 0.08);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary: #059669;
  --primary-hover: #047857;
  --primary-glow: rgba(5, 150, 105, 0.1);
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-glow: rgba(37, 99, 235, 0.1);
  --shadow-lg: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Accessibility: Skip to Content */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  z-index: 9999;
  font-family: var(--font-title);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-lg);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 20px;
  outline: 3px solid #fff;
}

/* Focus Indicators */
button:focus-visible,
select:focus-visible,
input:focus-visible,
textarea:focus-visible,
a:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* App Header */
.app-header {
  border-bottom: 1px solid var(--bg-panel-border);
  backdrop-filter: var(--glass-blur);
  background: rgba(6, 8, 19, 0.6);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background 0.3s ease;
}

[data-theme="light"] .app-header {
  background: rgba(240, 244, 249, 0.8);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  font-family: var(--font-title);
  font-weight: 800;
  letter-spacing: 1px;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-brand {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.5px;
  background: linear-gradient(to right, #fff, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .logo-brand {
  background: linear-gradient(to right, #0f172a, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-badge {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--bg-panel-border);
}

[data-theme="light"] .status-indicator {
  background: rgba(0, 0, 0, 0.03);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.online {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.status-dot.offline {
  background: var(--danger);
  box-shadow: 0 0 8px var(--danger);
}

.theme-btn {
  background: transparent;
  border: 1px solid var(--bg-panel-border);
  color: var(--text-main);
  padding: 8px;
  border-radius: 50%;
  cursor: pointer;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.theme-btn:hover {
  background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .theme-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="light"] .theme-icon-dark { display: none; }

/* Main Layout Grid */
.main-layout {
  flex: 1;
  padding: 32px 24px;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

.layout-container {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 1024px) {
  .layout-container {
    grid-template-columns: 1fr;
  }
}

/* Glass Panels */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--bg-panel-border);
  backdrop-filter: var(--glass-blur);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
  transition: var(--transition-smooth);
}

.panel:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

[data-theme="light"] .panel:hover {
  border-color: rgba(0, 0, 0, 0.12);
}

.panel-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 20px;
  color: var(--text-main);
  letter-spacing: -0.3px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Inputs & Form Styling */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.select-wrapper {
  position: relative;
}

.select-wrapper::after {
  content: "▼";
  font-size: 0.65rem;
  color: var(--text-muted);
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

select, input[type="range"], textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--bg-panel-border);
  color: var(--text-main);
  padding: 12px 16px;
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

[data-theme="light"] select, [data-theme="light"] textarea {
  background: rgba(0, 0, 0, 0.02);
}

select {
  appearance: none;
  cursor: pointer;
  padding-right: 40px;
}

select:hover, textarea:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] select:hover, [data-theme="light"] textarea:hover {
  border-color: rgba(0, 0, 0, 0.2);
}

select:focus, textarea:focus {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] select:focus, [data-theme="light"] textarea:focus {
  background: #fff;
}

.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Slider Controls */
.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.badge {
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
}

.form-help {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Checkbox fieldset */
.form-fieldset {
  border: 1px solid var(--bg-panel-border);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 18px;
}

.fieldset-legend {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0 8px;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkbox-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

.checkbox-item label {
  font-size: 0.9rem;
  cursor: pointer;
  user-select: none;
  font-weight: 500;
}

/* Textarea question */
textarea {
  resize: vertical;
  min-height: 60px;
}

/* Action Buttons */
.submit-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #fff;
  border: none;
  padding: 14px 20px;
  border-radius: 10px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: 0 4px 14px var(--primary-glow);
  transition: var(--transition-smooth);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.submit-btn:active {
  transform: translateY(0);
}

/* Right Column Grid */
.right-column-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Results Area */
.result-panel {
  min-height: 250px;
  display: flex;
  flex-direction: column;
}

.response-region {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
}

.empty-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 12px;
  opacity: 0.6;
}

/* Phrased Guidance UI styles */
.guidance-bubble {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--bg-panel-border);
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 16px;
  border-left: 4px solid var(--accent);
}

[data-theme="light"] .guidance-bubble {
  background: #fff;
}

.guidance-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.guidance-text {
  font-size: 1.05rem;
  line-height: 1.5;
}

/* Decision Details Card */
.decision-card {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--bg-panel-border);
  border-radius: 12px;
  padding: 18px;
}

.decision-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.meta-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-panel-border);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

[data-theme="light"] .meta-item {
  background: rgba(0, 0, 0, 0.03);
}

/* Path steps display */
.route-path {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  padding-left: 20px;
  margin-top: 10px;
}

.route-path::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--bg-panel-border);
}

.path-step {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
}

.path-step::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  border: 2px solid var(--bg-app);
}

.path-step.start::before {
  background: var(--accent);
}

.path-step.gate::before {
  background: var(--primary);
  width: 12px;
  height: 12px;
  left: -20px;
  top: 4px;
}

.path-step.end::before {
  background: var(--danger);
}

.path-step-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Tab controls */
.tabs-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tabs-nav {
  display: flex;
  border-bottom: 1px solid var(--bg-panel-border);
  gap: 16px;
}

.tabs-nav button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 10px 4px;
  cursor: pointer;
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
  transition: var(--transition-smooth);
}

.tabs-nav button:hover {
  color: var(--text-main);
}

.tabs-nav button[aria-selected="true"] {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content.hidden {
  display: none !important;
}

.tab-content {
  outline: none;
}

/* Status list */
.status-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.status-list .loading {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 20px 0;
}

.status-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--bg-panel-border);
  padding: 12px 16px;
  border-radius: 10px;
  transition: var(--transition-smooth);
}

[data-theme="light"] .status-item {
  background: #fff;
}

.status-item:hover {
  transform: translateX(4px);
  border-color: rgba(255, 255, 255, 0.15);
}

[data-theme="light"] .status-item:hover {
  border-color: rgba(0, 0, 0, 0.12);
}

.item-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.item-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.item-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.item-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Congestion Badge Styles */
.congestion-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 6px;
}

.congestion-badge.low {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.congestion-badge.medium {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}

.congestion-badge.high {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.congestion-badge.critical {
  background: rgba(185, 28, 28, 0.15);
  color: #b91c1c;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.6; }
  100% { opacity: 1; }
}

.transport-advisory-intro {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* Footers */
.app-footer {
  border-top: 1px solid var(--bg-panel-border);
  padding: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 40px;
  background: rgba(6, 8, 19, 0.3);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-warning {
  color: var(--danger);
  font-weight: 500;
  opacity: 0.85;
}

/* Noscript Styling */
.noscript-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-app);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.noscript-card {
  background: var(--bg-panel);
  border: 1px solid var(--bg-panel-border);
  max-width: 500px;
  width: 100%;
  padding: 32px;
  border-radius: 16px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.noscript-card h2 {
  color: var(--danger);
  margin-bottom: 16px;
  font-family: var(--font-title);
}

.noscript-card p {
  margin-bottom: 16px;
  font-size: 0.95rem;
}

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-delay: 0s !important;
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-delay: 0s !important;
    transition-duration: 0s !important;
  }
}

/* High Contrast Mode Adjustments */
@media (forced-colors: active) {
  .panel {
    border: 2px solid ButtonText;
  }
  .submit-btn {
    border: 2px solid ButtonText;
    background: ButtonFace;
    color: ButtonText;
  }
  .status-dot {
    background: ButtonText;
  }
  .route-path::before {
    background: CanvasText;
  }
  .path-step::before {
    background: CanvasText;
    border-color: Canvas;
  }
}