/* Liquid Glass UI Design System (dark-mode first, reusable, low-cost effects) */

:root {
  --glass-radius-lg: 24px;
  --glass-radius-md: 16px;
  --glass-radius-sm: 12px;
  --glass-border-dark: rgba(255, 255, 255, 0.18);
  --glass-bg-dark: linear-gradient(140deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.06));
  --glass-shadow-dark: 0 20px 40px rgba(4, 8, 28, 0.45);
  --glass-inner-dark: inset 0 1px 0 rgba(255, 255, 255, 0.23), inset 0 -1px 0 rgba(255, 255, 255, 0.07);
  --glass-shine: linear-gradient(115deg, rgba(255, 255, 255, 0.24) 0%, rgba(255, 255, 255, 0.05) 34%, rgba(255, 255, 255, 0) 62%);
  --glass-backdrop: blur(16px) saturate(150%);
}

[data-theme="light"] {
  --glass-border-dark: rgba(64, 84, 141, 0.2);
  --glass-bg-dark: linear-gradient(140deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.56));
  --glass-shadow-dark: 0 20px 34px rgba(96, 120, 180, 0.16);
  --glass-inner-dark: inset 0 1px 0 rgba(255, 255, 255, 0.72), inset 0 -1px 0 rgba(255, 255, 255, 0.28);
  --glass-shine: linear-gradient(115deg, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0.17) 32%, rgba(255, 255, 255, 0) 60%);
}

/* Core glass surface primitive */
.glass-surface,
.glass-btn,
.glass-pricing-card,
.glass-modal__panel,
.tool-list-panel,
.card,
.info-section,
.rating-dialog,
.faq-item,
.related-tool,
.feature-card,
.step-card {
  position: relative;
  border: 1px solid var(--glass-border-dark);
  background: var(--glass-bg-dark);
  box-shadow: var(--glass-shadow-dark), var(--glass-inner-dark);
}

.glass-surface::before,
.glass-pricing-card::before,
.tool-list-panel::before,
.card::before,
.info-section::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--glass-shine);
  pointer-events: none;
  opacity: 0.7;
}

@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .glass-surface,
  .glass-btn,
  .glass-pricing-card,
  .glass-modal__panel,
  .tool-list-panel,
  .card,
  .info-section,
  .rating-dialog,
  .faq-item,
  .related-tool,
  .feature-card,
  .step-card {
    -webkit-backdrop-filter: var(--glass-backdrop);
    backdrop-filter: var(--glass-backdrop);
  }
}

@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .glass-surface,
  .glass-btn,
  .glass-pricing-card,
  .glass-modal__panel,
  .tool-list-panel,
  .card,
  .info-section,
  .rating-dialog,
  .faq-item,
  .related-tool,
  .feature-card,
  .step-card {
    background: rgba(24, 34, 62, 0.9);
  }
}

[data-theme="light"] .tool-list-panel,
[data-theme="light"] .card,
[data-theme="light"] .info-section,
[data-theme="light"] .rating-dialog,
[data-theme="light"] .faq-item,
[data-theme="light"] .related-tool,
[data-theme="light"] .feature-card,
[data-theme="light"] .step-card {
  background: var(--glass-bg-dark);
}

/* Liquid glass style for theme toggle itself */
.theme-toggle {
  border-radius: 999px;
  border: 1px solid var(--glass-border-dark);
  background: var(--glass-bg-dark);
  box-shadow: var(--glass-shadow-dark), var(--glass-inner-dark);
  padding: 4px;
  transition: transform 180ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.theme-toggle:hover {
  transform: translateY(-1px) scale(1.03);
  border-color: rgba(143, 195, 255, 0.45);
}

.liquid-actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

/* GlassButton */
.glass-btn {
  overflow: hidden;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--glass-radius-sm);
  color: var(--text);
  background-clip: padding-box;
  transform: translateZ(0);
  transition: transform 180ms ease, box-shadow 220ms ease, border-color 220ms ease, filter 200ms ease;
}

.glass-btn:hover {
  transform: translateY(-1px) scale(1.02);
  border-color: rgba(143, 195, 255, 0.45);
  box-shadow: 0 16px 32px rgba(26, 42, 86, 0.35), inset 0 0 24px rgba(156, 214, 255, 0.18);
}

.glass-btn:active {
  transform: translateY(0) scale(0.99);
}

.glass-btn--primary {
  background:
    linear-gradient(130deg, rgba(97, 127, 255, 0.45), rgba(62, 196, 240, 0.3)),
    var(--glass-bg-dark);
  border-color: rgba(143, 195, 255, 0.45);
}

.glass-btn--icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 999px;
  font-size: 20px;
}

.glass-ripple {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0.05));
  animation: glass-ripple 600ms ease-out forwards;
  pointer-events: none;
  z-index: 0;
}

@keyframes glass-ripple {
  from {
    opacity: 0.8;
    width: 8px;
    height: 8px;
  }
  to {
    opacity: 0;
    width: 220px;
    height: 220px;
  }
}

/* GlassNavbar */
.glass-navbar {
  position: sticky;
  top: 8px;
  z-index: 30;
  border-radius: var(--glass-radius-md);
  transition: background 220ms ease, box-shadow 220ms ease, border-color 220ms ease, backdrop-filter 220ms ease;
}

.glass-navbar.is-scrolled {
  border-color: rgba(163, 207, 255, 0.34);
  box-shadow: 0 18px 40px rgba(8, 16, 38, 0.44);
}

/* GlassCard hover */
.tool-list-panel,
.card,
.info-section,
.feature-card,
.step-card,
.related-tool {
  will-change: transform;
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.tool-list-panel:hover,
.card:hover,
.info-section:hover {
  transform: translateY(-2px) scale(1.01);
}

/* GlassModal */
.glass-modal {
  position: fixed;
  inset: 0;
  z-index: 75;
  display: grid;
  place-items: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
}

.glass-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.glass-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 10, 25, 0.45);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.glass-modal__panel {
  width: min(100%, 520px);
  border-radius: var(--glass-radius-lg);
  padding: 20px;
  z-index: 1;
  transform: translateY(14px) scale(0.98);
  transition: transform 240ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.glass-modal.is-open .glass-modal__panel {
  transform: translateY(0) scale(1);
}

.glass-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

/* GlassPricingCard */
.glass-pricing-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.glass-pricing-card {
  border-radius: 20px;
  padding: 20px;
  overflow: hidden;
  animation: glass-fade-in 480ms ease both;
}

.glass-pricing-card h3,
.glass-pricing-card p {
  margin: 0;
}

.glass-pricing-card ul {
  margin: 14px 0;
  padding-left: 18px;
  color: var(--muted);
}

.glass-pricing-card__tag {
  display: inline-flex;
  padding: 5px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid var(--glass-border-dark);
}

.glass-pricing-card__price {
  margin-top: 8px;
  font-size: 1.8rem;
  font-weight: 800;
}

.glass-pricing-card__price span {
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 500;
  margin-left: 6px;
}

.glass-pricing-card--featured {
  border-color: rgba(145, 212, 255, 0.45);
  box-shadow: 0 20px 44px rgba(30, 52, 98, 0.44), inset 0 0 0 1px rgba(153, 225, 255, 0.25);
}

.glass-pricing-card--featured::after {
  content: "";
  position: absolute;
  inset: -80% 28% auto;
  height: 220%;
  transform: rotate(25deg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0));
  animation: premium-shimmer 3.8s linear infinite;
  pointer-events: none;
}

@keyframes premium-shimmer {
  from {
    transform: translateX(-140%) rotate(25deg);
  }
  to {
    transform: translateX(180%) rotate(25deg);
  }
}

@keyframes glass-fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Active nav links (if used elsewhere) */
.glass-navbar .is-active,
.glass-nav-link.is-active {
  border-color: rgba(139, 201, 255, 0.5);
  background: rgba(118, 168, 255, 0.2);
}

/* Keep motion cheap and accessible */
@media (prefers-reduced-motion: reduce) {
  .glass-btn,
  .glass-pricing-card,
  .glass-modal,
  .glass-modal__panel,
  .glass-navbar {
    transition: none !important;
    animation: none !important;
  }
}

@media (max-width: 760px) {
  .glass-pricing-grid {
    grid-template-columns: 1fr;
  }

  .glass-navbar {
    top: 6px;
  }
}