/**
 * Mi Fitness Dashboard & Developer Console Design System
 * Modern Glassmorphism & High-Density Health Analytics UI
 * Designed for Mi Fitness MCP CN
 */

/* ==========================================================================
   1. Design Tokens & CSS Custom Properties
   ========================================================================== */

:root {
  /* Color Palette - Dark Mode (Default) */
  --bg-base: #090d16;
  --bg-gradient: radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.08) 0%, transparent 40%),
                 radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
                 #090d16;
  --bg-surface: rgba(17, 24, 39, 0.72);
  --bg-surface-hover: rgba(30, 41, 59, 0.85);
  --bg-surface-active: rgba(51, 65, 85, 0.9);
  --bg-card: rgba(15, 23, 42, 0.65);
  --bg-card-hover: rgba(30, 41, 59, 0.75);
  --bg-input: rgba(11, 18, 32, 0.85);
  --bg-input-focus: rgba(15, 23, 42, 0.95);
  --bg-code: #070b12;
  --bg-modal-overlay: rgba(0, 0, 0, 0.75);

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);
  --border-active: rgba(56, 189, 248, 0.4);
  --border-focus: #38bdf8;

  /* Typography Colors */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-inverted: #0f172a;

  /* Brand & Accent Colors */
  --accent-cyan: #38bdf8;
  --accent-cyan-glow: rgba(56, 189, 248, 0.35);
  --accent-indigo: #818cf8;
  --accent-indigo-glow: rgba(129, 140, 248, 0.35);
  --accent-purple: #a855f7;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;
  --accent-teal: #14b8a6;
  --accent-pink: #ec4899;

  /* Status Colors */
  --status-success: #10b981;
  --status-success-bg: rgba(16, 185, 129, 0.15);
  --status-warning: #f59e0b;
  --status-warning-bg: rgba(245, 158, 11, 0.15);
  --status-error: #ef4444;
  --status-error-bg: rgba(239, 68, 68, 0.15);
  --status-info: #38bdf8;
  --status-info-bg: rgba(56, 189, 248, 0.15);

  /* Shadows & Elevation */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.4), 0 2px 6px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.5), 0 4px 12px -2px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px -2px var(--accent-cyan-glow);
  --shadow-glow-indigo: 0 0 20px -2px var(--accent-indigo-glow);

  /* Glassmorphism & Blurs */
  --backdrop-blur: blur(16px);
  --backdrop-blur-sm: blur(8px);

  /* Transitions & Animation Timings */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Border Radii */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Layout Constants */
  --header-height: 68px;
  --sidebar-width: 240px;
  --sidebar-collapsed-width: 72px;
  --inspector-width: 460px;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-base: #f8fafc;
  --bg-gradient: radial-gradient(circle at 15% 15%, rgba(14, 165, 233, 0.08) 0%, transparent 40%),
                 radial-gradient(circle at 85% 85%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
                 #f8fafc;
  --bg-surface: rgba(255, 255, 255, 0.85);
  --bg-surface-hover: rgba(241, 245, 249, 0.95);
  --bg-surface-active: #e2e8f0;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-input: #ffffff;
  --bg-input-focus: #ffffff;
  --bg-code: #0f172a;
  --bg-modal-overlay: rgba(15, 23, 42, 0.6);

  --border-subtle: rgba(0, 0, 0, 0.05);
  --border-default: rgba(0, 0, 0, 0.1);
  --border-active: rgba(14, 165, 233, 0.5);
  --border-focus: #0284c7;

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --text-inverted: #f8fafc;

  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.25);
  --accent-indigo: #4f46e5;
  --accent-indigo-glow: rgba(79, 70, 229, 0.25);

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 14px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.12);
}

/* ==========================================================================
   2. Reset, Base & Typography
   ========================================================================== */

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

html, body {
  height: 100%;
  width: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text-primary);
  background: var(--bg-gradient);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Custom Sleek Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.25);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(56, 189, 248, 0.5);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #7dd3fc;
}

code, pre {
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, monospace;
}

/* ==========================================================================
   3. Application Shell & Top Header
   ========================================================================== */

#app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  padding: 0 24px;
  background: var(--bg-surface);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #0284c7, #6366f1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
  position: relative;
  overflow: hidden;
}

.brand-icon::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent 40%, rgba(255, 255, 255, 0.3) 50%, transparent 60%);
  animation: shine 4s infinite;
}

@keyframes shine {
  0% { transform: translateX(-100%) translateY(-100%); }
  20% { transform: translateX(100%) translateY(100%); }
  100% { transform: translateX(100%) translateY(100%); }
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(to right, #f8fafc, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .brand-title {
  background: linear-gradient(to right, #0f172a, #475569);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
  text-transform: uppercase;
  -webkit-text-fill-color: var(--accent-cyan);
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-muted);
}

/* Header Status & Controls */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.status-indicator-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--status-success);
  box-shadow: 0 0 8px var(--status-success);
  position: relative;
}

.status-dot.pulsing::after {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border-radius: 50%;
  border: 1px solid var(--status-success);
  animation: pulseDot 2s infinite;
}

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

.status-dot.offline.pulsing::after {
  border-color: var(--status-error);
}

@keyframes pulseDot {
  0% { transform: scale(1); opacity: 0.8; }
  70% { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.2); opacity: 0; }
}

.api-key-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 240px;
}

.api-key-input-wrapper input {
  width: 100%;
  padding: 7px 32px 7px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 12.5px;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.api-key-input-wrapper input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
  background: var(--bg-input-focus);
}

.api-key-icon-btn {
  position: absolute;
  right: 8px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: color var(--transition-fast);
}

.api-key-icon-btn:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   4. App Main Layout (Sidebar + Workspace + Inspector)
   ========================================================================== */

.main-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--inspector-width);
  gap: 0;
  min-height: calc(100vh - var(--header-height));
  position: relative;
}

/* Left Sidebar Navigation */
.app-sidebar {
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 12px;
  margin-bottom: 6px;
}

.nav-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  width: 100%;
  text-align: left;
  transition: all var(--transition-fast);
  user-select: none;
}

.nav-item:hover {
  color: var(--text-primary);
  background: var(--bg-surface-hover);
  border-color: var(--border-subtle);
}

.nav-item.active {
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.25);
  font-weight: 600;
  box-shadow: inset 0 0 12px rgba(56, 189, 248, 0.1);
}

.nav-icon {
  font-size: 16px;
  width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.85;
}

.nav-item.active .nav-icon {
  opacity: 1;
  transform: scale(1.1);
  filter: drop-shadow(0 0 6px var(--accent-cyan-glow));
}

.nav-badge {
  margin-left: auto;
  font-size: 10.5px;
  padding: 1px 7px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

.nav-item.active .nav-badge {
  background: rgba(56, 189, 248, 0.2);
  color: var(--accent-cyan);
}

/* Central Workspace Area */
.app-content {
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 100%;
}

.tab-pane {
  display: none;
  flex-direction: column;
  gap: 18px;
  animation: fadeIn 0.25s ease-out;
}

.tab-pane.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   5. UI Cards, Panels & Glass Containers
   ========================================================================== */

.glass-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.glass-panel:hover {
  border-color: var(--border-active);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 12px;
}

.panel-title {
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}

.panel-title .title-icon {
  font-size: 16px;
  color: var(--accent-cyan);
}

.panel-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Overview Stat Cards Grid */
.stat-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-active);
  box-shadow: var(--shadow-md);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-card-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}

.stat-card-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  background: rgba(255, 255, 255, 0.05);
}

.stat-card.steps .stat-card-icon { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }
.stat-card.hr .stat-card-icon { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); }
.stat-card.sleep .stat-card-icon { background: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }
.stat-card.calories .stat-card-icon { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }
.stat-card.spo2 .stat-card-icon { background: rgba(20, 184, 166, 0.15); color: var(--accent-teal); }
.stat-card.stress .stat-card-icon { background: rgba(236, 72, 153, 0.15); color: var(--accent-pink); }

.stat-card-value {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.stat-card-unit {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}

.stat-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--text-dim);
}

.stat-card-badge {
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  font-weight: 600;
  font-size: 10.5px;
}

.stat-card-badge.up { background: var(--status-success-bg); color: var(--status-success); }
.stat-card-badge.down { background: var(--status-error-bg); color: var(--status-error); }
.stat-card-badge.neutral { background: rgba(255, 255, 255, 0.08); color: var(--text-muted); }

/* ==========================================================================
   6. Form Controls, Datepickers, Inputs & Buttons
   ========================================================================== */

.form-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
  min-width: 140px;
}

.form-group.sm {
  max-width: 140px;
}

.form-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.input-control, .select-control {
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.input-control:hover, .select-control:hover {
  border-color: var(--border-active);
}

.input-control:focus, .select-control:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

/* Date Preset Quick Filter Pills */
.date-preset-pills {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.preset-pill {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 11.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preset-pill:hover {
  border-color: var(--border-active);
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.preset-pill.active {
  background: var(--accent-cyan-glow);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Custom Checkbox & Toggle Switch */
.custom-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
  margin-top: 6px;
}

.custom-checkbox input {
  display: none;
}

.checkbox-box {
  width: 17px;
  height: 17px;
  border-radius: var(--radius-xs);
  border: 1.5px solid var(--border-default);
  background: var(--bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  color: transparent;
  font-size: 12px;
  transition: all var(--transition-fast);
}

.custom-checkbox input:checked + .checkbox-box {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  color: var(--text-inverted);
  box-shadow: 0 0 8px var(--accent-cyan-glow);
}

/* Switch Toggle */
.switch-control {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.switch-control input {
  display: none;
}

.switch-track {
  width: 36px;
  height: 20px;
  background: var(--bg-surface-active);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-fast);
  border: 1px solid var(--border-default);
}

.switch-thumb {
  width: 14px;
  height: 14px;
  background: #ffffff;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform var(--transition-bounce);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.switch-control input:checked + .switch-track {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.switch-control input:checked + .switch-track .switch-thumb {
  transform: translateX(16px);
}

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1, #1d4ed8);
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.45);
}

.btn-secondary {
  background: var(--bg-card);
  border-color: var(--border-default);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  color: var(--accent-cyan);
}

.btn-outline {
  background: transparent;
  border-color: var(--border-default);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--status-error);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: var(--status-error);
}

.btn-success {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--status-success);
}

.btn-success:hover {
  background: rgba(16, 185, 129, 0.25);
  border-color: var(--status-success);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 10px 20px;
  font-size: 14px;
  border-radius: var(--radius-lg);
}

.btn-icon-only {
  padding: 8px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
}

.btn-icon-only:hover {
  border-color: var(--border-active);
  color: var(--accent-cyan);
}

/* Button Group */
.btn-group {
  display: inline-flex;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-default);
}

.btn-group .btn {
  border-radius: 0;
  border: none;
  border-right: 1px solid var(--border-default);
}

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

/* ==========================================================================
   7. Data Visualization & Component Badges
   ========================================================================== */

/* Sleep Stage Visual Timeline */
.sleep-timeline-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 14px 0;
}

.sleep-timeline-bar {
  display: flex;
  height: 28px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-code);
  border: 1px solid var(--border-default);
}

.sleep-segment {
  height: 100%;
  position: relative;
  transition: opacity var(--transition-fast);
  cursor: pointer;
}

.sleep-segment:hover {
  opacity: 0.8;
  filter: brightness(1.2);
}

.sleep-segment.deep { background: #3b82f6; }
.sleep-segment.light { background: #60a5fa; }
.sleep-segment.rem { background: #8b5cf6; }
.sleep-segment.awake { background: #f59e0b; }

.sleep-legend {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 11.5px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.legend-dot.deep { background: #3b82f6; }
.legend-dot.light { background: #60a5fa; }
.legend-dot.rem { background: #8b5cf6; }
.legend-dot.awake { background: #f59e0b; }

/* Metric Series Custom Chart Canvas Container */
.chart-container {
  width: 100%;
  height: 240px;
  position: relative;
  background: var(--bg-code);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  overflow-x: auto;
}

.chart-bar-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  height: 100%;
  justify-content: flex-end;
  min-width: 28px;
  position: relative;
}

.chart-bar {
  width: 18px;
  background: linear-gradient(180deg, var(--accent-cyan), #2563eb);
  border-radius: var(--radius-xs) var(--radius-xs) 0 0;
  transition: height 0.4s ease-out, background var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.chart-bar:hover {
  background: linear-gradient(180deg, #7dd3fc, #3b82f6);
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

.chart-bar-label {
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 6px;
  white-space: nowrap;
}

.chart-bar-tooltip {
  position: absolute;
  bottom: calc(100% + 6px);
  background: var(--bg-surface-active);
  color: var(--text-primary);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-default);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translateY(4px);
  transition: all var(--transition-fast);
  z-index: 10;
}

.chart-bar:hover .chart-bar-tooltip {
  opacity: 1;
  transform: translateY(0);
}

/* Multi-select sync type tags */
.tag-pills-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0;
}

.tag-pill {
  padding: 6px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-default);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.tag-pill:hover {
  border-color: var(--border-active);
  color: var(--text-primary);
}

.tag-pill.selected {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 600;
}

.tag-pill .tag-check {
  font-size: 11px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tag-pill.selected .tag-check {
  opacity: 1;
}

/* Data Table Grid */
.data-table-container {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  margin-top: 10px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  text-align: left;
}

.data-table th {
  background: rgba(255, 255, 255, 0.03);
  padding: 10px 14px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-default);
  white-space: nowrap;
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
}

/* Pill Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
}

.badge-success { background: var(--status-success-bg); color: var(--status-success); border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-warning { background: var(--status-warning-bg); color: var(--status-warning); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-danger { background: var(--status-error-bg); color: var(--status-error); border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-info { background: var(--status-info-bg); color: var(--status-info); border: 1px solid rgba(56, 189, 248, 0.3); }
.badge-purple { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); border: 1px solid rgba(168, 85, 247, 0.3); }

/* ==========================================================================
   8. Right-Side Live Developer Console & Response Inspector
   ========================================================================== */

.app-inspector {
  background: var(--bg-surface);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow: hidden;
}

.inspector-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.inspector-title {
  font-size: 13.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-primary);
}

.inspector-meta-bar {
  padding: 10px 18px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  gap: 8px;
}

.meta-badges-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.http-method-pill {
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  font-weight: 700;
  font-size: 10.5px;
  text-transform: uppercase;
}

.http-method-pill.get { background: #0369a1; color: #e0f2fe; }
.http-method-pill.post { background: #047857; color: #d1fae5; }
.http-method-pill.delete { background: #b91c1c; color: #fee2e2; }
.http-method-pill.put { background: #b45309; color: #fef3c7; }

.status-pill {
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  font-weight: 700;
  font-size: 10.5px;
}

.status-pill.ok { background: #064e3b; color: #34d399; }
.status-pill.err { background: #7f1d1d; color: #f87171; }
.status-pill.pending { background: #1e1b4b; color: #a5b4fc; }

.latency-pill {
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  font-size: 11px;
  font-family: monospace;
}

.inspector-actions-bar {
  padding: 8px 18px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 8px;
}

.inspector-search-input {
  flex: 1;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-default);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 11.5px;
}

.inspector-body {
  flex: 1;
  padding: 14px 18px;
  background: var(--bg-code);
  overflow-y: auto;
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: 12px;
  line-height: 1.6;
  color: #e2e8f0;
  white-space: pre-wrap;
  word-break: break-all;
  position: relative;
}

/* JSON Viewer Syntax Highlighting */
.json-key { color: #38bdf8; font-weight: 600; }
.json-string { color: #4ade80; }
.json-number { color: #fbbf24; }
.json-boolean { color: #f472b6; font-weight: 600; }
.json-null { color: #94a3b8; font-style: italic; }

.inspector-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  gap: 12px;
  text-align: center;
}

.inspector-empty-icon {
  font-size: 42px;
  opacity: 0.4;
}

/* ==========================================================================
   9. Modal Dialogs & Popup Overlays
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-modal-overlay);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease-out;
}

.modal-backdrop.active {
  display: flex;
}

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalPop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalPop {
  0% { transform: scale(0.9) translateY(20px); opacity: 0; }
  100% { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface-hover);
}

.modal-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 22px;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

/* QR Code Display in Modal */
.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 16px 0;
}

.qr-image-frame {
  width: 220px;
  height: 220px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.qr-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.qr-scan-beam {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #0284c7, transparent);
  box-shadow: 0 0 10px #38bdf8;
  animation: scanBeam 2.5s infinite ease-in-out;
}

@keyframes scanBeam {
  0% { top: 5%; opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { top: 95%; opacity: 0; }
}

.qr-timer-bar {
  width: 100%;
  height: 4px;
  background: var(--bg-surface-active);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.qr-timer-progress {
  height: 100%;
  background: var(--accent-cyan);
  width: 100%;
  transition: width 1s linear;
}

/* ==========================================================================
   10. Toast Notification System
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast-message {
  pointer-events: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 12px 18px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
  max-width: 420px;
  animation: toastSlideIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  transition: all var(--transition-normal);
}

@keyframes toastSlideIn {
  0% { transform: translateX(120%) scale(0.9); opacity: 0; }
  100% { transform: translateX(0) scale(1); opacity: 1; }
}

.toast-message.toast-leaving {
  transform: translateX(120%) scale(0.9);
  opacity: 0;
}

.toast-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.toast-message.success { border-color: rgba(16, 185, 129, 0.4); }
.toast-message.success .toast-icon { color: var(--status-success); }
.toast-message.error { border-color: rgba(239, 68, 68, 0.4); }
.toast-message.error .toast-icon { color: var(--status-error); }
.toast-message.warning { border-color: rgba(245, 158, 11, 0.4); }
.toast-message.warning .toast-icon { color: var(--status-warning); }
.toast-message.info { border-color: rgba(56, 189, 248, 0.4); }
.toast-message.info .toast-icon { color: var(--status-info); }

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.toast-desc {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 1px;
}

/* ==========================================================================
   11. Micro-animations, Loaders & Skeleton States
   ========================================================================== */

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.skeleton {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.03) 25%, rgba(255, 255, 255, 0.08) 50%, rgba(255, 255, 255, 0.03) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.8s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Pulse animation for live updates */
.live-pulse {
  animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Tooltip Styling */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--bg-surface-active);
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-default);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-fast);
  z-index: 100;
  box-shadow: var(--shadow-md);
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ==========================================================================
   12. Responsive Breakpoints & Mobile Adaptations
   ========================================================================== */

@media (max-width: 1400px) {
  :root {
    --inspector-width: 380px;
  }
}

@media (max-width: 1200px) {
  .main-layout {
    grid-template-columns: var(--sidebar-collapsed-width) 1fr var(--inspector-width);
  }

  .nav-item span:not(.nav-icon) {
    display: none;
  }

  .nav-section-title {
    display: none;
  }

  .nav-item {
    justify-content: center;
    padding: 10px;
  }
}

@media (max-width: 992px) {
  .main-layout {
    grid-template-columns: 1fr;
  }

  .app-sidebar {
    display: none; /* Can be toggled with mobile drawer */
  }

  .app-inspector {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 320px;
    z-index: 90;
    border-left: none;
    border-top: 1px solid var(--border-default);
  }

  .app-content {
    padding-bottom: 340px;
  }
}

@media (max-width: 640px) {
  .top-header {
    padding: 0 14px;
  }

  .brand-subtitle, .api-key-input-wrapper {
    display: none;
  }

  .stat-cards-grid {
    grid-template-columns: 1fr 1fr;
  }

  .form-row {
    flex-direction: column;
    align-items: stretch;
  }

  .form-group {
    width: 100%;
    max-width: none !important;
  }
}