/* ==========================================================================
   Python Profiler - Shared CSS Foundation
   Design system shared between Flamegraph and Heatmap viewers
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables & Theme System
   -------------------------------------------------------------------------- */

:root {
  /* Typography */
  --font-sans: "Source Sans Pro", "Lucida Grande", "Lucida Sans Unicode",
               "Geneva", "Verdana", sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Consolas', 'Liberation Mono', monospace;

  /* Python brand colors (theme-independent) */
  --python-blue: #3776ab;
  --python-blue-light: #4584bb;
  --python-blue-lighter: #5592cc;
  --python-gold: #ffd43b;
  --python-gold-dark: #ffcd02;
  --python-gold-light: #ffdc5c;

  /* Heat palette - defined per theme below */

  /* Layout */
  --sidebar-width: 280px;
  --sidebar-collapsed: 44px;
  --topbar-height: 56px;
  --statusbar-height: 32px;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.3s ease;
}

/* Light theme (default) */
:root, [data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --border: #e9ecef;
  --border-subtle: #f0f2f5;

  --text-primary: #2e3338;
  --text-secondary: #5a6c7d;
  --text-muted: #6f767e;

  --accent: #3776ab;
  --accent-hover: #2d5aa0;
  --accent-glow: rgba(55, 118, 171, 0.15);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);

  --header-gradient: linear-gradient(135deg, #3776ab 0%, #4584bb 100%);

  /* Light mode heat palette - blue to yellow to orange to red (cold to hot) */
  --heat-1: #7ba3d1;
  --heat-2: #a8d0ef;
  --heat-3: #d6e9f8;
  --heat-4: #ffe6a8;
  --heat-5: #ffd43b;
  --heat-6: #ffb84d;
  --heat-7: #ff9966;
  --heat-8: #ff6347;

  /* Code view specific */
  --code-bg: #ffffff;
  --code-bg-line: #f8f9fa;
  --code-border: #e9ecef;
  --code-text: #2e3338;
  --code-text-muted: #8b949e;
  --code-accent: #3776ab;

  /* Navigation colors */
  --nav-caller: #2563eb;
  --nav-caller-hover: #1d4ed8;
  --nav-callee: #dc2626;
  --nav-callee-hover: #b91c1c;

  /* Specialization status colors */
  --spec-high: #4caf50;
  --spec-high-text: #2e7d32;
  --spec-high-bg: rgba(76, 175, 80, 0.15);
  --spec-medium: #ff9800;
  --spec-medium-text: #e65100;
  --spec-medium-bg: rgba(255, 152, 0, 0.15);
  --spec-low: #9e9e9e;
  --spec-low-text: #616161;
  --spec-low-bg: rgba(158, 158, 158, 0.15);

  /* Heatmap span highlighting colors */
  --span-hot-base: 255, 100, 50;
  --span-cold-base: 150, 150, 150;
}

/* Dark theme */
[data-theme="dark"] {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --border-subtle: #21262d;

  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #757e8a;

  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --accent-glow: rgba(88, 166, 255, 0.15);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

  --header-gradient: linear-gradient(135deg, #21262d 0%, #30363d 100%);

  /* Dark mode heat palette - muted colors that provide sufficient contrast with light text */
  --heat-1: rgba(74, 123, 167, 0.35);
  --heat-2: rgba(90, 159, 168, 0.38);
  --heat-3: rgba(106, 181, 181, 0.40);
  --heat-4: rgba(126, 196, 136, 0.42);
  --heat-5: rgba(160, 216, 120, 0.45);
  --heat-6: rgba(196, 222, 106, 0.48);
  --heat-7: rgba(244, 212, 77, 0.50);
  --heat-8: rgba(255, 107, 53, 0.55);

  /* Code view specific - dark mode */
  --code-bg: #0d1117;
  --code-bg-line: #161b22;
  --code-border: #30363d;
  --code-text: #e6edf3;
  --code-text-muted: #6e7681;
  --code-accent: #58a6ff;

  /* Navigation colors - dark theme friendly */
  --nav-caller: #58a6ff;
  --nav-caller-hover: #4184e4;
  --nav-callee: #f87171;
  --nav-callee-hover: #e53e3e;

  /* Specialization status colors - dark theme */
  --spec-high: #81c784;
  --spec-high-text: #81c784;
  --spec-high-bg: rgba(129, 199, 132, 0.2);
  --spec-medium: #ffb74d;
  --spec-medium-text: #ffb74d;
  --spec-medium-bg: rgba(255, 183, 77, 0.2);
  --spec-low: #bdbdbd;
  --spec-low-text: #9e9e9e;
  --spec-low-bg: rgba(189, 189, 189, 0.15);

  /* Heatmap span highlighting colors - dark theme */
  --span-hot-base: 255, 107, 53;
  --span-cold-base: 189, 189, 189;
}

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */

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

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition-normal), color var(--transition-normal);
}

/* --------------------------------------------------------------------------
   Layout Structure
   -------------------------------------------------------------------------- */

.app-layout {
  display: flex;
  flex-direction: column;
}

/* --------------------------------------------------------------------------
   Top Bar
   -------------------------------------------------------------------------- */

.top-bar {
  height: var(--topbar-height);
  background: var(--header-gradient);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 16px;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(55, 118, 171, 0.25);
  border-bottom: 2px solid var(--python-gold);
}

/* Brand / Logo */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 40px;
  flex-shrink: 0;
}

/* Style the inlined SVG/img inside brand-logo */
.brand-logo svg,
.brand-logo img {
  width: 48px;
  height: 40px;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.brand-info {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.3px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
  color: inherit;
  text-decoration: none;
}

.brand-subtitle {
  font-weight: 500;
  font-size: 10px;
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.brand-divider {
  width: 1px;
  height: 16px;
  background: rgba(255, 255, 255, 0.3);
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.toolbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: 15px;
  color: white;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.toolbar-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.35);
}

.toolbar-btn:active {
  transform: scale(0.95);
}

/* --------------------------------------------------------------------------
   Status Bar
   -------------------------------------------------------------------------- */

.status-bar {
  height: var(--statusbar-height);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.status-item::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--python-gold);
  border-radius: 50%;
}

.status-item:first-child::before {
  display: none;
}

.status-label {
  color: var(--text-muted);
}

.status-value {
  color: var(--text-primary);
  font-weight: 500;
}

.status-value.accent {
  color: var(--accent);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* --------------------------------------------------------------------------
   Focus States (Accessibility)
   -------------------------------------------------------------------------- */

button:focus-visible,
select:focus-visible,
input:focus-visible,
.toggle-switch:focus-visible,
a.toolbar-btn:focus-visible {
  outline: 2px solid var(--python-gold);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Shared Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .brand-subtitle {
    display: none;
  }
}

@media (max-width: 600px) {
  .toolbar-btn:not(.theme-toggle) {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Toggle Switch
   -------------------------------------------------------------------------- */

.toggle-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  font-family: var(--font-sans);
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}

.toggle-switch:hover {
  opacity: 0.85;
}

.toggle-switch .toggle-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  white-space: nowrap;
  display: inline-flex;
  flex-direction: column;
}

.toggle-switch .toggle-label.active {
  color: var(--text-primary);
  font-weight: 600;
}

/* Reserve space for bold text to prevent layout shift on toggle */
.toggle-switch .toggle-label::after {
  content: attr(data-text);
  font-weight: 600;
  height: 0;
  visibility: hidden;
}

.toggle-switch.disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: not-allowed;
}

.toggle-track {
  position: relative;
  width: 36px;
  height: 20px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  border-radius: 12px;
  transition: all var(--transition-fast);
  box-shadow: inset var(--shadow-sm);
}

.toggle-track:hover {
  border-color: var(--text-muted);
}

.toggle-track.on {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.toggle-track::after {
  content: '';
  position: absolute;
  top: 1px;
  left: 1px;
  width: 14px;
  height: 14px;
  background: white;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.toggle-track.on::after {
  transform: translateX(16px);
  box-shadow: var(--shadow-md);
}