/* ==========================================================================
   TapTex Global Design System Utilities (21st.dev / Apple / Linear Standard)
   ========================================================================== */

:root {
  --canvas-dark-from: #0b0d13;
  --canvas-dark-to: #050608;
  --glass-surface: rgba(255, 255, 255, 0.03);
  --glass-surface-hover: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.16);
  --glass-border-gold: rgba(201, 162, 39, 0.35);
  --glass-blur: blur(16px);
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* Base Viewport & Zero-Overflow Foundation */
html, body {
  max-width: 100vw;
  overflow-x: hidden;
  box-sizing: border-box;
}

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

/* Glassmorphism Surface Helpers */
.glass-panel {
  background: var(--glass-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.glass-panel-gold {
  background: var(--glass-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border-gold);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45), 0 0 20px rgba(201, 162, 39, 0.08);
}

/* Premium Glow Button */
.btn-glow {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  border-radius: var(--radius-xs);
  background: var(--gold-accent, #c9a227);
  color: #050608;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, filter 0.2s ease;
  box-shadow: 0 4px 18px rgba(201, 162, 39, 0.35), 0 1px 3px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.btn-glow:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(201, 162, 39, 0.45), 0 2px 6px rgba(0, 0, 0, 0.2);
  filter: brightness(1.05);
}

.btn-glow:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 2px 10px rgba(201, 162, 39, 0.25);
}

/* Tactile Click/Tap Response Utility */
.tap-tactile {
  transition: transform 0.15s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.15s ease;
}
.tap-tactile:active {
  transform: scale(0.98);
}

/* Apple / Linear Style Theme Toggle */
.theme-toggle-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 8px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary, #f3f4f6);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 10px;
}

html[data-theme="light"] .theme-toggle-btn {
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.1);
  color: #0f172a;
}

.theme-toggle-btn:hover {
  transform: scale(1.08) rotate(12deg);
}

html[data-theme="dark"] .theme-toggle-btn:hover {
  background: rgba(201, 162, 39, 0.12);
  border-color: rgba(201, 162, 39, 0.35);
  color: #fbbf24;
  box-shadow: 0 0 16px rgba(201, 162, 39, 0.2);
}

html[data-theme="light"] .theme-toggle-btn:hover {
  background: rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.2);
  color: #0f172a;
  transform: scale(1.08) rotate(-12deg);
}

.theme-toggle-btn:active {
  transform: scale(0.92);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease, color 0.3s ease;
}

/* Icon swapping */
html[data-theme="dark"] .theme-icon-sun {
  display: block;
  color: #fbbf24;
}
html[data-theme="dark"] .theme-icon-moon {
  display: none;
}
html[data-theme="light"] .theme-icon-sun {
  display: none;
}
html[data-theme="light"] .theme-icon-moon {
  display: block;
  color: #334155;
}

/* Floating Corner Theme Toggle */
.floating-theme-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

/* Elegant Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(201, 162, 39, 0.4);
}