/*
 * ios-glass.css — iOS Frosted Glass Design System
 * Builds on top of ios-system.css + tokens.css.
 * Import AFTER both: <link rel="stylesheet" href="/css/ios-glass.css">
 *
 * Design tokens sourced from:
 *   - Spatial UI / VisionOS: --glass-blur:40px, --glass-saturate:180%, --window-radius:24px
 *   - Glassmorphism: backdrop-filter blur 10-20px, translucent borders, z-depth
 *   - Liquid Glass: morphing transitions 400-600ms, iridescent gradients
 *
 * RULE: Never hardcode brand colors. Use var() with fallbacks only.
 * Created: 2026-06-03
 */

/* ═══════════════════════════════════════════════════════════════════════
   §1  Glass Custom Properties
   ═══════════════════════════════════════════════════════════════════════ */
:root {
  /* ── Glass foundation ── */
  --glass-blur:         20px;
  --glass-blur-heavy:   40px;
  --glass-blur-light:   12px;
  --glass-saturate:     180%;
  --glass-bg:           rgba(0, 14, 8, 0.65);
  --glass-bg-light:     rgba(0, 14, 8, 0.45);
  --glass-bg-heavy:     rgba(0, 14, 8, 0.82);
  --glass-border:       rgba(255, 255, 255, 0.08);
  --glass-border-light: rgba(255, 255, 255, 0.12);
  --glass-highlight:    rgba(255, 255, 255, 0.04);
  --glass-shadow:       0 8px 32px rgba(0, 0, 0, 0.25);
  --glass-shadow-lg:    0 16px 48px rgba(0, 0, 0, 0.35);
  --glass-inset-shadow:  inset 0 1px 0 rgba(255, 255, 255, 0.06);

  /* ── Glass geometry ── */
  --glass-radius:       var(--ios-radius-lg, 20px);
  --glass-radius-sm:    var(--ios-radius, 14px);
  --glass-radius-xl:    var(--ios-radius-xl, 24px);
  --glass-radius-sheet: 16px 16px 0 0;

  /* ── Glass transitions (spring-inspired) ── */
  --glass-spring:       0.5s cubic-bezier(0.2, 0.9, 0.3, 1.0);
  --glass-spring-fast:  0.3s cubic-bezier(0.2, 0.9, 0.3, 1.0);
  --glass-spring-slow:  0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --glass-morph:        0.4s cubic-bezier(0.4, 0.0, 0.2, 1.0);

  /* ── Sheet handle ── */
  --sheet-handle-w:     36px;
  --sheet-handle-h:     5px;
  --sheet-handle-color: rgba(255, 255, 255, 0.25);
}

/* ── Light mode overrides ── */
[data-mode="light"] {
  --glass-bg:           rgba(255, 255, 255, 0.72);
  --glass-bg-light:     rgba(255, 255, 255, 0.55);
  --glass-bg-heavy:     rgba(255, 255, 255, 0.88);
  --glass-border:       rgba(0, 0, 0, 0.06);
  --glass-border-light: rgba(0, 0, 0, 0.08);
  --glass-highlight:    rgba(255, 255, 255, 0.5);
  --glass-shadow:       0 8px 32px rgba(0, 0, 0, 0.08);
  --glass-shadow-lg:    0 16px 48px rgba(0, 0, 0, 0.12);
  --glass-inset-shadow:  inset 0 1px 0 rgba(255, 255, 255, 0.8);
  --sheet-handle-color: rgba(0, 0, 0, 0.2);
}

/* ═══════════════════════════════════════════════════════════════════════
   §2  Glass Card
   ═══════════════════════════════════════════════════════════════════════ */
.glass-card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow), var(--glass-inset-shadow);
  padding: var(--ios-padding-lg, 20px);
  transition: transform var(--glass-spring-fast),
              box-shadow var(--glass-spring-fast),
              background var(--glass-morph);
}

.glass-card:hover {
  box-shadow: var(--glass-shadow-lg), var(--glass-inset-shadow);
}

/* Pressed state for interactive glass cards */
.glass-card:active,
.glass-card--interactive:active {
  transform: scale(0.98);
}

/* ── Glass Card Variants ── */
.glass-card--subtle {
  background: var(--glass-bg-light);
  -webkit-backdrop-filter: saturate(150%) blur(var(--glass-blur-light));
  backdrop-filter: saturate(150%) blur(var(--glass-blur-light));
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.glass-card--elevated {
  background: var(--glass-bg-heavy);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  box-shadow: var(--glass-shadow-lg), var(--glass-inset-shadow);
}

/* Grouped glass cards (iOS Settings-style) */
.glass-card-group {
  border-radius: var(--glass-radius);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  background: var(--glass-bg);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
}

.glass-card-group > * {
  border-bottom: 0.5px solid var(--glass-border-light);
}

.glass-card-group > *:last-child {
  border-bottom: none;
}

/* ═══════════════════════════════════════════════════════════════════════
   §3  Glass Sheet (iOS pull-up sheet)
   ═══════════════════════════════════════════════════════════════════════ */
.glass-sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal, 500);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--glass-spring-fast), visibility var(--glass-spring-fast);
  -webkit-tap-highlight-color: transparent;
}

.glass-sheet-overlay.active {
  opacity: 1;
  visibility: visible;
}

.glass-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 92vh;
  background: var(--glass-bg-heavy);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  border: 1px solid var(--glass-border);
  border-bottom: none;
  border-radius: var(--glass-radius-sheet);
  box-shadow: 0 -8px 48px rgba(0, 0, 0, 0.3);
  z-index: calc(var(--z-modal, 500) + 1);
  transform: translateY(100%);
  transition: transform var(--glass-spring);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.glass-sheet-overlay.active .glass-sheet {
  transform: translateY(0);
}

/* Sheet handle bar */
.glass-sheet-handle {
  display: flex;
  justify-content: center;
  padding: 10px 0 6px;
  position: sticky;
  top: 0;
  z-index: 1;
}

.glass-sheet-handle::before {
  content: '';
  width: var(--sheet-handle-w);
  height: var(--sheet-handle-h);
  border-radius: var(--radius-full, 9999px);
  background: var(--sheet-handle-color);
}

.glass-sheet-content {
  padding: 0 var(--ios-padding-lg, 20px) var(--ios-padding-lg, 20px);
}

/* ═══════════════════════════════════════════════════════════════════════
   §4  Glass Navigation Bar
   ═══════════════════════════════════════════════════════════════════════ */
.glass-nav {
  background: var(--glass-bg-heavy);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  border-bottom: 0.5px solid var(--glass-border);
  box-shadow: 0 1px 0 var(--glass-highlight);
}

.glass-nav--bottom {
  border-bottom: none;
  border-top: 0.5px solid var(--glass-border);
  box-shadow: 0 -1px 0 var(--glass-highlight);
}

/* ═══════════════════════════════════════════════════════════════════════
   §5  Glass Panel (sidebars, drawers)
   ═══════════════════════════════════════════════════════════════════════ */
.glass-panel {
  background: var(--glass-bg);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  border-right: 0.5px solid var(--glass-border);
  box-shadow: var(--glass-inset-shadow);
}

.glass-panel--right {
  border-right: none;
  border-left: 0.5px solid var(--glass-border);
}

.glass-panel--floating {
  border-radius: var(--glass-radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow-lg);
  margin: 8px;
}

/* ═══════════════════════════════════════════════════════════════════════
   §6  Glass Modal
   ═══════════════════════════════════════════════════════════════════════ */
.glass-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal, 500);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--glass-spring-fast), visibility var(--glass-spring-fast);
}

.glass-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.glass-modal {
  background: var(--glass-bg-heavy);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius-xl);
  box-shadow: var(--glass-shadow-lg), var(--glass-inset-shadow);
  width: 100%;
  max-width: 420px;
  max-height: 85vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--glass-spring);
}

.glass-modal-overlay.active .glass-modal {
  transform: scale(1) translateY(0);
}

.glass-modal-header {
  padding: 20px 20px 12px;
  text-align: center;
  border-bottom: 0.5px solid var(--glass-border-light);
}

.glass-modal-body {
  padding: var(--ios-padding-lg, 20px);
}

.glass-modal-footer {
  padding: 12px 20px 20px;
  display: flex;
  gap: 8px;
}

/* ═══════════════════════════════════════════════════════════════════════
   §7  Glass Input Fields
   ═══════════════════════════════════════════════════════════════════════ */
.glass-input {
  background: var(--glass-bg-light);
  -webkit-backdrop-filter: saturate(150%) blur(var(--glass-blur-light));
  backdrop-filter: saturate(150%) blur(var(--glass-blur-light));
  border: 1px solid var(--glass-border);
  border-radius: var(--ios-radius-sm, 10px);
  padding: 12px 16px;
  font-size: 16px; /* prevents iOS auto-zoom */
  font-family: var(--ios-font, -apple-system, BlinkMacSystemFont, system-ui, sans-serif);
  color: var(--accent-text, #00ffa3);
  transition: border-color var(--glass-morph),
              box-shadow var(--glass-morph),
              background var(--glass-morph);
  -webkit-appearance: none;
  appearance: none;
}

.glass-input:focus {
  background: var(--glass-bg);
  border-color: var(--border-focus, rgba(0,255,163,0.35));
  box-shadow: 0 0 0 3px var(--accent-dim, rgba(0,255,163,0.15)),
              var(--glass-inset-shadow);
  outline: none;
}

.glass-input::placeholder {
  color: var(--muted, rgba(200,255,240,0.58));
}

/* ═══════════════════════════════════════════════════════════════════════
   §8  Glass Section Header
   ═══════════════════════════════════════════════════════════════════════ */
.glass-section-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--glass-bg-light);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  padding: 8px var(--ios-padding, 16px);
  font-family: var(--ios-font, -apple-system, BlinkMacSystemFont, system-ui, sans-serif);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted, rgba(200,255,240,0.58));
  border-bottom: 0.5px solid var(--glass-border);
}

/* ═══════════════════════════════════════════════════════════════════════
   §9  Glass Pill / Badge
   ═══════════════════════════════════════════════════════════════════════ */
.glass-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: var(--radius-full, 9999px);
  background: var(--glass-bg-light);
  -webkit-backdrop-filter: saturate(150%) blur(var(--glass-blur-light));
  backdrop-filter: saturate(150%) blur(var(--glass-blur-light));
  border: 1px solid var(--glass-border);
  font-family: var(--ios-font, -apple-system, BlinkMacSystemFont, system-ui, sans-serif);
  font-size: var(--font-size-xs, 10px);
  font-weight: 600;
  color: var(--accent-text, #00ffa3);
  transition: all var(--glass-spring-fast);
}

.glass-pill--success { color: var(--success, #00ffa3); border-color: var(--accent-dim, rgba(0,255,163,0.15)); }
.glass-pill--warning { color: var(--warning, #fad015); border-color: rgba(250,208,21,0.2); }
.glass-pill--danger  { color: var(--danger, #ff4d6d);  border-color: rgba(255,77,109,0.2); }
.glass-pill--info    { color: var(--info, #3ac9ff);    border-color: rgba(58,201,255,0.2); }
.glass-pill--muted   { color: var(--muted);            border-color: var(--glass-border); }

/* ═══════════════════════════════════════════════════════════════════════
   §10  Glass Toolbar
   ═══════════════════════════════════════════════════════════════════════ */
.glass-toolbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--glass-bg-heavy);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur-heavy));
  border-top: 0.5px solid var(--glass-border);
  padding: 8px var(--ios-padding, 16px) calc(8px + env(safe-area-inset-bottom, 0px));
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: var(--z-sticky, 200);
}

/* ═══════════════════════════════════════════════════════════════════════
   §11  Glass Tab Bar
   ═══════════════════════════════════════════════════════════════════════ */
.glass-tabs {
  display: flex;
  background: var(--glass-bg);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  border-radius: var(--glass-radius-sm);
  padding: 3px;
  gap: 2px;
  border: 1px solid var(--glass-border);
}

.glass-tab {
  flex: 1;
  padding: 10px 16px;
  border-radius: calc(var(--glass-radius-sm) - 2px);
  font-family: var(--ios-font, -apple-system, BlinkMacSystemFont, system-ui, sans-serif);
  font-size: var(--font-size-sm, 12px);
  font-weight: 600;
  color: var(--muted, rgba(200,255,240,0.58));
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--glass-spring-fast);
  text-align: center;
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}

.glass-tab.active,
.glass-tab[aria-selected="true"] {
  background: var(--accent, #00ffa3);
  color: var(--bg-deep, #000b06);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.glass-tab:active {
  transform: scale(0.97);
  opacity: 0.85;
}

/* ═══════════════════════════════════════════════════════════════════════
   §12  Glass Table
   ═══════════════════════════════════════════════════════════════════════ */
.glass-table {
  width: 100%;
  background: var(--glass-bg);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  border-radius: var(--glass-radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  overflow: hidden;
  border-collapse: separate;
  border-spacing: 0;
}

.glass-table th {
  background: var(--glass-bg-light);
  font-family: var(--ios-font, -apple-system, BlinkMacSystemFont, system-ui, sans-serif);
  font-size: var(--font-size-xs, 10px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted, rgba(200,255,240,0.58));
  padding: 10px var(--ios-padding, 16px);
  text-align: left;
  border-bottom: 0.5px solid var(--glass-border);
}

.glass-table td {
  padding: 12px var(--ios-padding, 16px);
  border-bottom: 0.5px solid var(--glass-border-light);
  font-family: var(--ios-font, -apple-system, BlinkMacSystemFont, system-ui, sans-serif);
  font-size: var(--font-size-md, 14px);
  color: var(--accent-text, #00ffa3);
}

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

.glass-table tr:hover td {
  background: var(--glass-highlight);
}

/* ═══════════════════════════════════════════════════════════════════════
   §13  Page-Level Glass Treatment
   Applied via body.glass-page — converts whole page to glass aesthetic
   ═══════════════════════════════════════════════════════════════════════ */
body.glass-page {
  font-family: var(--ios-font, -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif);
}

/* Keep monospace for code/data elements */
body.glass-page code,
body.glass-page pre,
body.glass-page .mono,
body.glass-page [class*="code"],
body.glass-page [class*="terminal"],
body.glass-page [class*="json"],
body.glass-page [class*="log"] {
  font-family: var(--font-mono, 'Share Tech Mono', 'Roboto Mono', monospace);
}

/* Auto-upgrade existing .card elements on glass pages */
body.glass-page .card,
body.glass-page [class*="card"]:not(.glass-card):not([class*="card-grid"]):not([class*="card-title"]):not([class*="card-editor"]) {
  background: var(--glass-bg);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  border-color: var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-inset-shadow);
  border-radius: var(--glass-radius);
}

/* Auto-upgrade sidebar on glass pages */
body.glass-page .sidebar,
body.glass-page [class*="sidebar"] {
  background: var(--glass-bg);
  -webkit-backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  backdrop-filter: saturate(var(--glass-saturate)) blur(var(--glass-blur));
  border-color: var(--glass-border);
}

/* ═══════════════════════════════════════════════════════════════════════
   §14  Utility Classes
   ═══════════════════════════════════════════════════════════════════════ */
.glass-blur       { -webkit-backdrop-filter: blur(var(--glass-blur)); backdrop-filter: blur(var(--glass-blur)); }
.glass-blur-heavy { -webkit-backdrop-filter: blur(var(--glass-blur-heavy)); backdrop-filter: blur(var(--glass-blur-heavy)); }
.glass-bg         { background: var(--glass-bg); }
.glass-bg-light   { background: var(--glass-bg-light); }
.glass-bg-heavy   { background: var(--glass-bg-heavy); }
.glass-border     { border: 1px solid var(--glass-border); }
.glass-shadow     { box-shadow: var(--glass-shadow); }
.glass-spring     { transition: all var(--glass-spring); }
.glass-spring-fast { transition: all var(--glass-spring-fast); }

/* ═══════════════════════════════════════════════════════════════════════
   §15  Responsive Glass Refinements
   ═══════════════════════════════════════════════════════════════════════ */

/* Reduce blur intensity on low-power / small devices for performance */
@media (max-width: 480px) {
  :root {
    --glass-blur: 16px;
    --glass-blur-heavy: 24px;
  }
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  :root {
    --glass-spring:      0.2s ease;
    --glass-spring-fast: 0.15s ease;
    --glass-spring-slow: 0.25s ease;
    --glass-morph:       0.2s ease;
  }

  .glass-sheet,
  .glass-modal {
    transition: none;
  }
}