/* ==========================================================================
   Layout - Base styles, header, graph container
   ========================================================================== */

/* Base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow: hidden;
  transition:
    background var(--transition-slow),
    color var(--transition-slow);
}

/* Background */
.background-mesh {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 20% 20%, var(--bg-gradient-start) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, var(--bg-gradient-mid) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, var(--bg-gradient-end) 0%, transparent 50%),
    var(--bg-primary);
  opacity: 0.8;
  transition: opacity var(--transition-slow);
}
[data-theme='dark'] .background-mesh {
  opacity: 0.4;
}

/* Glass utilities */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow:
    0 4px 6px -1px var(--glass-shadow),
    0 2px 4px -2px var(--glass-shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}
.glass-subtle {
  background: var(--glass-bg-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding: var(--space-md) var(--space-xl);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  border-top: none;
  transition: transform var(--transition-normal);
}
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}
.title-section {
  flex: 1;
  min-width: 280px;
}
.main-title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-supports) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}
.author-name {
  font-weight: 600;
  color: var(--text-primary);
}

/* Controls */
.controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.search-container {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-full);
  min-width: 200px;
  transition: all var(--transition-normal);
}
.search-container:focus-within {
  box-shadow: 0 0 0 3px var(--accent-supports-glow);
}
.search-icon {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  flex-shrink: 0;
}
#search-input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.875rem;
  width: 100%;
  outline: none;
}
#search-input::placeholder {
  color: var(--text-muted);
}

/* Filter buttons */
.filter-group {
  display: flex;
  gap: var(--space-xs);
}
.filter-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
}
.filter-btn:hover {
  color: var(--text-primary);
  transform: translateY(-1px);
}
.filter-btn.active {
  background: var(--glass-bg);
  color: var(--text-primary);
  box-shadow: 0 2px 8px var(--glass-shadow);
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.dot.supports {
  background: var(--accent-supports);
}
.dot.challenges {
  background: var(--accent-challenges);
}
.dot.balanced {
  background: var(--accent-balanced);
}
.filter-count {
  font-weight: 700;
  font-family: var(--font-display);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
}
.theme-toggle:hover {
  transform: rotate(15deg) scale(1.05);
}
.theme-toggle svg {
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
}
.sun-icon {
  display: block;
}
.moon-icon {
  display: none;
}
[data-theme='dark'] .sun-icon {
  display: none;
}
[data-theme='dark'] .moon-icon {
  display: block;
}

/* Header toggle & collapse */
.header-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--glass-bg-subtle);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  flex-shrink: 0;
}
.header-toggle svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
  transition: transform var(--transition-normal);
}
.header-toggle:hover {
  background: var(--glass-bg);
}
.header-toggle:hover svg {
  color: var(--text-primary);
}
.header-compact {
  display: none;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 56px;
  padding: var(--space-sm) var(--space-xl);
  background: transparent;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  cursor: pointer;
}
.header-compact .compact-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-supports) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.search-container-compact {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--text-muted);
  min-width: 200px;
  max-width: 300px;
  transition: border-color var(--transition-normal);
  cursor: text;
}
.search-container-compact:focus-within {
  border-bottom-color: var(--accent-supports);
}
.search-container-compact .search-icon {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
}
.search-container-compact input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.875rem;
  width: 100%;
  outline: none;
}
.search-container-compact input::placeholder {
  color: var(--text-muted);
}
.header.collapsed {
  transform: translateY(calc(-100% + 56px));
}
.header.collapsed .header-content {
  visibility: hidden;
  opacity: 0;
}
.header.collapsed .header-compact {
  display: flex;
}
.header.collapsed .header-toggle svg {
  transform: rotate(180deg);
}

/* Graph container */
.graph-container {
  position: fixed;
  inset: 0;
  z-index: var(--z-graph);
  padding-top: 140px;
  transition: padding-top var(--transition-normal);
}
#graph {
  width: 100%;
  height: 100%;
}
#graph svg {
  width: 100%;
  height: 100%;
}
.header.collapsed ~ .graph-container {
  padding-top: 70px;
}

/* Zoom controls */
.zoom-controls {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: var(--z-controls);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-sm);
  border-radius: var(--radius-lg);
  transition: opacity 0.2s ease;
}
.zoom-controls.hidden {
  opacity: 0;
  pointer-events: none;
}
.zoom-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
}
.zoom-btn:hover {
  background: var(--glass-bg-subtle);
}
.zoom-btn svg {
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
}

/* Scrollbar & Selection */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}
::selection {
  background: var(--accent-supports-glow);
  color: var(--text-primary);
}