/* ============================================================
   LIQUID GLASS CSS — macOS 26 / iOS 26 Tahoe Style
   Frosted Glass Morphism, Reflections, Depth System
   ============================================================ */

/* ─── Glass Base Variables ─── */
:root {
  --glass-bg-light:        rgba(255, 255, 255, 0.18);
  --glass-bg-medium:       rgba(255, 255, 255, 0.12);
  --glass-bg-dark:         rgba(255, 255, 255, 0.06);
  --glass-border:          rgba(255, 255, 255, 0.30);
  --glass-border-subtle:   rgba(255, 255, 255, 0.12);
  --glass-shadow:          0 8px 32px rgba(0, 0, 0, 0.18), 0 2px 8px rgba(0, 0, 0, 0.10);
  --glass-shadow-deep:     0 20px 60px rgba(0, 0, 0, 0.30), 0 8px 24px rgba(0, 0, 0, 0.16);
  --glass-shadow-hover:    0 24px 72px rgba(0, 0, 0, 0.35), 0 10px 30px rgba(0, 0, 0, 0.20);
  --glass-blur:            blur(24px) saturate(180%);
  --glass-blur-heavy:      blur(40px) saturate(200%);
  --glass-blur-ultra:      blur(60px) saturate(220%);
  --glass-highlight:       rgba(255, 255, 255, 0.55);
  --glass-inner-shadow:    inset 0 1px 0 rgba(255,255,255,0.50), inset 0 -1px 0 rgba(0,0,0,0.05);
  --glass-glow-blue:       0 0 30px rgba(10, 132, 255, 0.20);
  --glass-glow-gold:       0 0 30px rgba(255, 195, 0, 0.15);

  /* Refraction layers */
  --refract-top:           linear-gradient(135deg, rgba(255,255,255,0.45) 0%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0.15) 100%);
  --refract-shimmer:       linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.18) 50%, transparent 60%);
}

/* ─── Dark Mode Overrides ─── */
@media (prefers-color-scheme: dark) {
  :root {
    --glass-bg-light:      rgba(30, 30, 40, 0.55);
    --glass-bg-medium:     rgba(20, 20, 30, 0.45);
    --glass-bg-dark:       rgba(10, 10, 20, 0.35);
    --glass-border:        rgba(255, 255, 255, 0.12);
    --glass-border-subtle: rgba(255, 255, 255, 0.06);
    --glass-highlight:     rgba(255, 255, 255, 0.18);
    --refract-top:         linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.02) 50%, rgba(255,255,255,0.08) 100%);
  }
}

/* ─── Base Glass Panel ─── */
.glass {
  background: var(--glass-bg-light);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--glass-shadow), var(--glass-inner-shadow);
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ─── Glass Refraction Layer (pseudo top reflection) ─── */
.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--refract-top);
  border-radius: inherit;
  pointer-events: none;
  z-index: 0;
  opacity: 0.7;
}

/* ─── Shimmer Sweep on Hover ─── */
.glass::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--refract-shimmer);
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.3s ease;
  transform: translateX(-100%);
}

.glass:hover::after {
  opacity: 1;
  animation: shimmer-sweep 0.6s ease forwards;
}

/* ─── Glass Variants ─── */
.glass-medium {
  background: var(--glass-bg-medium);
  backdrop-filter: var(--glass-blur-heavy);
  -webkit-backdrop-filter: var(--glass-blur-heavy);
}

.glass-heavy {
  background: var(--glass-bg-dark);
  backdrop-filter: var(--glass-blur-ultra);
  -webkit-backdrop-filter: var(--glass-blur-ultra);
}

.glass-card {
  background: var(--glass-bg-light);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.3s ease,
              background 0.3s ease;
  transform-style: preserve-3d;
  cursor: pointer;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 50%;
  background: var(--refract-top);
  border-radius: 24px 24px 0 0;
  pointer-events: none;
  z-index: 0;
}

.glass-card:hover {
  box-shadow: var(--glass-shadow-hover), var(--glass-glow-blue);
  background: rgba(255,255,255,0.22);
  transform: translateY(-4px) scale(1.01);
}

.glass-card:active {
  transform: translateY(-1px) scale(0.99);
  box-shadow: var(--glass-shadow);
  transition: all 0.1s ease;
}

/* ─── Sidebar Glass ─── */
.glass-sidebar {
  background: rgba(20, 20, 35, 0.72);
  backdrop-filter: var(--glass-blur-ultra);
  -webkit-backdrop-filter: var(--glass-blur-ultra);
  border-right: 1px solid rgba(255,255,255,0.08);
  box-shadow: 4px 0 40px rgba(0,0,0,0.25);
}

@media (prefers-color-scheme: light) {
  .glass-sidebar {
    background: rgba(240, 242, 250, 0.78);
    border-right: 1px solid rgba(255,255,255,0.60);
    box-shadow: 4px 0 30px rgba(0,0,0,0.10);
  }
}

/* ─── Topbar Glass ─── */
.glass-topbar {
  background: rgba(255,255,255,0.10);
  backdrop-filter: blur(30px) saturate(200%);
  -webkit-backdrop-filter: blur(30px) saturate(200%);
  border-bottom: 1px solid rgba(255,255,255,0.15);
  box-shadow: 0 1px 0 rgba(255,255,255,0.12),
              0 4px 24px rgba(0,0,0,0.12);
}

/* ─── Button Glass ─── */
.glass-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 50px;
  border: 1px solid rgba(255,255,255,0.30);
  background: rgba(10, 132, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #fff;
  font-family: 'Inter', -apple-system, sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 16px rgba(10, 132, 255, 0.35),
              inset 0 1px 0 rgba(255,255,255,0.35);
  user-select: none;
}

.glass-btn::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 50%;
  background: linear-gradient(180deg, rgba(255,255,255,0.25) 0%, transparent 100%);
  border-radius: 50px 50px 0 0;
  pointer-events: none;
}

.glass-btn:hover {
  background: rgba(10, 132, 255, 0.90);
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 28px rgba(10, 132, 255, 0.50),
              inset 0 1px 0 rgba(255,255,255,0.40);
}

.glass-btn:active {
  transform: translateY(0) scale(0.97);
  transition: all 0.08s ease;
}

/* Ripple effect */
.glass-btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  transform: scale(0);
  animation: ripple-expand 0.55s linear;
  pointer-events: none;
}

/* ─── Glass Input ─── */
.glass-input {
  background: rgba(255,255,255,0.10);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.20);
  border-radius: 14px;
  padding: 10px 16px;
  color: inherit;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  outline: none;
  transition: all 0.25s ease;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.08);
}

.glass-input:focus {
  border-color: rgba(10, 132, 255, 0.60);
  background: rgba(255,255,255,0.15);
  box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.18),
              inset 0 2px 4px rgba(0,0,0,0.05);
}

/* ─── Mouse Tracking Reflection ─── */
.glass-reflect {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.20) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  z-index: 2;
  opacity: 0;
  mix-blend-mode: overlay;
}

.glass-card:hover .glass-reflect {
  opacity: 1;
}

/* ─── Depth / Parallax Layer ─── */
.depth-layer {
  position: relative;
  transform-style: preserve-3d;
  perspective: 1000px;
}

.depth-layer .depth-content {
  transform: translateZ(20px);
}

/* ─── Status Ring ─── */
.status-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.status-ring svg circle.track {
  fill: none;
  stroke: rgba(255,255,255,0.10);
  stroke-width: 4;
}

.status-ring svg circle.progress {
  fill: none;
  stroke-width: 4;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: center;
  transition: stroke-dashoffset 1.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ─── Animated Gradient Background ─── */
.liquid-bg {
  background: linear-gradient(
    135deg,
    hsl(220, 60%, 8%) 0%,
    hsl(235, 55%, 12%) 25%,
    hsl(215, 50%, 10%) 50%,
    hsl(240, 60%, 8%) 75%,
    hsl(225, 55%, 6%) 100%
  );
  background-size: 400% 400%;
  animation: liquid-bg-shift 18s ease infinite;
}

/* ─── Ambient Orbs ─── */
.ambient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
  animation: orb-float 12s ease-in-out infinite;
}

.orb-blue  { background: radial-gradient(circle, hsl(210,100%,55%), transparent 70%); }
.orb-gold  { background: radial-gradient(circle, hsl(45, 100%, 55%), transparent 70%); }
.orb-purple{ background: radial-gradient(circle, hsl(270,80%, 60%), transparent 70%); }

/* ─── Notification Badge ─── */
.glass-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 50px;
  background: #ff3b30;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(255,59,48,0.45);
  animation: badge-pulse 2s ease-in-out infinite;
}

/* ─── Shimmer Animations ─── */
@keyframes shimmer-sweep {
  0%   { transform: translateX(-100%); opacity: 0; }
  20%  { opacity: 1; }
  100% { transform: translateX(100%); opacity: 0; }
}

@keyframes ripple-expand {
  to { transform: scale(4); opacity: 0; }
}

@keyframes liquid-bg-shift {
  0%, 100% { background-position: 0% 50%; }
  50%       { background-position: 100% 50%; }
}

@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -20px) scale(1.08); }
  66%       { transform: translate(-20px, 15px) scale(0.95); }
}

@keyframes badge-pulse {
  0%, 100% { box-shadow: 0 2px 8px rgba(255,59,48,0.45); }
  50%       { box-shadow: 0 2px 16px rgba(255,59,48,0.70); }
}