/* ==========================================================================
   AURORA GLASS — Liquid Glass Design System v2.0
   A modern, perceptually-tuned, dark-mode-aware glassmorphism system
   built on OKLCH color, fluid type, animated aurora mesh, and true
   specular depth layering. Responsive 320px → 2560px+.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300..800&family=Sora:wght@400..800&display=swap');

/* ==========================================================================
   DESIGN TOKENS
   ========================================================================== */
:root {
  /* ---- Typography ---- */
  --font-display: 'Sora', 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'JetBrains Mono', ui-monospace, monospace;

  /* Fluid Modular Type Scale (1.250 — Major Third) */
  --text-xs:   clamp(0.72rem, 0.70rem + 0.1vw, 0.78rem);
  --text-sm:   clamp(0.83rem, 0.80rem + 0.15vw, 0.89rem);
  --text-base: clamp(0.94rem, 0.91rem + 0.15vw, 1rem);
  --text-md:   clamp(1.06rem, 1.02rem + 0.2vw, 1.15rem);
  --text-lg:   clamp(1.25rem, 1.18rem + 0.35vw, 1.45rem);
  --text-xl:   clamp(1.56rem, 1.45rem + 0.55vw, 1.95rem);
  --text-2xl:  clamp(1.95rem, 1.78rem + 0.85vw, 2.6rem);
  --text-3xl:  clamp(2.44rem, 2.15rem + 1.45vw, 3.5rem);
  --text-4xl:  clamp(3.05rem, 2.6rem + 2.25vw, 4.5rem);

  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.55;
  --leading-relaxed: 1.7;

  --tracking-tight: -0.035em;
  --tracking-normal: -0.01em;
  --tracking-wide: 0.02em;
  --tracking-wider: 0.06em;

  /* ---- Color System (OKLCH for perceptual uniformity) ---- */
  /* Brand: Sky / Electric Blue */
  --brand-50:  oklch(0.97 0.02 240);
  --brand-100: oklch(0.93 0.05 240);
  --brand-200: oklch(0.88 0.08 240);
  --brand-300: oklch(0.82 0.11 240);
  --brand-400: oklch(0.75 0.14 240);
  --brand-500: oklch(0.68 0.17 240);
  --brand-600: oklch(0.60 0.19 245);
  --brand-700: oklch(0.52 0.18 248);
  --brand-800: oklch(0.44 0.15 250);
  --brand-900: oklch(0.36 0.12 252);
  --brand-950: oklch(0.28 0.09 255);

  /* Semantic Accents */
  --emerald-500: oklch(0.72 0.19 155);
  --emerald-600: oklch(0.62 0.17 155);
  --amber-500:   oklch(0.80 0.16 70);
  --amber-600:   oklch(0.70 0.16 65);
  --rose-500:    oklch(0.65 0.22 18);
  --rose-600:    oklch(0.58 0.22 18);
  --violet-500:  oklch(0.62 0.20 290);

  /* ---- Light Theme Surface Tokens ---- */
  --bg-base: oklch(0.97 0.015 240);
  --bg-elevated: oklch(0.99 0.008 240);

  /* Text */
  --text-primary:   oklch(0.22 0.04 255);
  --text-secondary: oklch(0.42 0.04 250);
  --text-muted:     oklch(0.55 0.03 250);
  --text-inverse:   oklch(0.99 0.01 240);

  /* ---- Glass Surface Tokens (3 Depth Levels) ---- */
  /* Level 1: Subtle — for large background panels */
  --glass-1-bg:       color-mix(in oklch 85%, transparent; var(--brand-50) 6%);
  --glass-1-bg:      oklch(0.97 0.015 240 / 0.55);
  --glass-1-border:  oklch(1 0 0 / 0.50);
  --glass-1-blur:    blur(16px) saturate(150%);

  /* Level 2: Default — for cards, inputs */
  --glass-2-bg:      oklch(0.99 0.005 240 / 0.65);
  --glass-2-border:  oklch(1 0 0 / 0.65);
  --glass-2-blur:    blur(20px) saturate(180%);

  /* Level 3: Prominent — for dropdowns, modals, nav */
  --glass-3-bg:      oklch(0.99 0.005 240 / 0.82);
  --glass-3-border:  oklch(1 0 0 / 0.75);
  --glass-3-blur:    blur(28px) saturate(200%);

  --glass-bg-hover:  oklch(1 0 0 / 0.78);

  /* Specular highlight gradient (simulates light refraction on glass edge) */
  --glass-specular: linear-gradient(
    135deg,
    oklch(1 0 0 / 0.18) 0%,
    oklch(1 0 0 / 0.05) 30%,
    transparent 50%,
    oklch(1 0 0 / 0.03) 70%,
    oklch(1 0 0 / 0.12) 100%
  );

  /* ---- Shadows (layered for realistic depth) ---- */
  --shadow-xs: 0 1px 2px oklch(0.2 0.04 255 / 0.06);
  --shadow-sm: 0 2px 8px oklch(0.2 0.04 255 / 0.06), 0 1px 2px oklch(0.2 0.04 255 / 0.04);
  --shadow-md: 0 4px 12px oklch(0.2 0.04 255 / 0.08), 0 2px 6px oklch(0.2 0.04 255 / 0.05);
  --shadow-lg: 0 12px 32px oklch(0.2 0.04 255 / 0.10), 0 4px 12px oklch(0.2 0.04 255 / 0.06);
  --shadow-xl: 0 24px 56px oklch(0.2 0.04 255 / 0.14), 0 8px 20px oklch(0.2 0.04 255 / 0.08);
  --shadow-2xl: 0 40px 80px oklch(0.2 0.04 255 / 0.20), 0 12px 28px oklch(0.2 0.04 255 / 0.10);

  /* Inset highlight — the "liquid" sheen on top edge */
  --inset-highlight: inset 0 1px 1px oklch(1 0 0 / 0.7);
  --inset-highlight-strong: inset 0 1px 2px oklch(1 0 0 / 0.85), inset 0 -1px 1px oklch(1 0 0 / 0.15);

  /* Glow shadows for accent elements */
  --glow-brand:   0 0 0 1px oklch(0.68 0.17 240 / 0.2), 0 8px 28px oklch(0.68 0.17 240 / 0.35);
  --glow-emerald: 0 0 0 1px oklch(0.72 0.19 155 / 0.2), 0 8px 28px oklch(0.72 0.19 155 / 0.30);
  --glow-amber:   0 0 0 1px oklch(0.80 0.16 70 / 0.2),  0 8px 28px oklch(0.80 0.16 70 / 0.30);
  --glow-rose:    0 0 0 1px oklch(0.65 0.22 18 / 0.2),  0 8px 28px oklch(0.65 0.22 18 / 0.30);

  /* ---- Radii (geometric progression) ---- */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-2xl: 36px;
  --radius-full: 9999px;

  /* ---- Spacing (fluid, scales with viewport) ---- */
  --space-xs:  clamp(0.38rem, 0.35rem + 0.1vw, 0.5rem);
  --space-sm:  clamp(0.56rem, 0.52rem + 0.15vw, 0.69rem);
  --space-md:  clamp(0.88rem, 0.82rem + 0.2vw, 1.06rem);
  --space-lg:  clamp(1.25rem, 1.15rem + 0.4vw, 1.56rem);
  --space-xl:  clamp(1.75rem, 1.55rem + 0.8vw, 2.5rem);
  --space-2xl: clamp(2.5rem, 2.1rem + 1.6vw, 4rem);
  --space-3xl: clamp(3.5rem, 2.8rem + 2.8vw, 6rem);

  /* ---- Motion ---- */
  --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out-expo:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-standard:  cubic-bezier(0.4, 0, 0.2, 1);

  --dur-fast: 0.15s;
  --dur-normal: 0.25s;
  --dur-slow: 0.4s;
  --dur-slower: 0.6s;

  /* ---- Gradients ---- */
  --grad-brand:   linear-gradient(135deg, var(--brand-400), var(--brand-600));
  --grad-brand-hover: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  --grad-emerald: linear-gradient(135deg, var(--emerald-500), var(--emerald-600));
  --grad-amber:   linear-gradient(135deg, var(--amber-500), var(--amber-600));
  --grad-rose:    linear-gradient(135deg, var(--rose-500), var(--rose-600));
  --grad-aurora:  linear-gradient(135deg, var(--brand-400), var(--violet-500), var(--emerald-500));

  /* ---- Layout ---- */
  --container-max: 1320px;
  --container-pad: clamp(1rem, 0.5rem + 2vw, 2rem);
  --nav-height: 72px;

  /* ---- Z-Index Scale ---- */
  --z-base: 1;
  --z-sticky: 100;
  --z-dropdown: 1000;
  --z-overlay: 2000;
  --z-modal: 3000;
  --z-toast: 4000;
}

/* ==========================================================================
   DARK THEME OVERRIDES
   ========================================================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-base: oklch(0.16 0.02 255);
    --bg-elevated: oklch(0.20 0.02 255);

    --text-primary:   oklch(0.96 0.01 240);
    --text-secondary: oklch(0.78 0.02 240);
    --text-muted:     oklch(0.65 0.02 240);
    --text-inverse:   oklch(0.16 0.02 255);

    --glass-1-bg:      oklch(0.22 0.02 255 / 0.50);
    --glass-1-border:  oklch(1 0 0 / 0.08);
    --glass-2-bg:      oklch(0.24 0.02 255 / 0.60);
    --glass-2-border:  oklch(1 0 0 / 0.12);
    --glass-3-bg:      oklch(0.26 0.02 255 / 0.75);
    --glass-3-border:  oklch(1 0 0 / 0.15);
    --glass-bg-hover:  oklch(0.30 0.02 255 / 0.70);

    --glass-specular: linear-gradient(
      135deg,
      oklch(1 0 0 / 0.10) 0%,
      oklch(1 0 0 / 0.03) 30%,
      transparent 50%,
      oklch(1 0 0 / 0.02) 70%,
      oklch(1 0 0 / 0.06) 100%
    );

    --shadow-xs: 0 1px 2px oklch(0 0 0 / 0.20);
    --shadow-sm: 0 2px 8px oklch(0 0 0 / 0.25), 0 1px 2px oklch(0 0 0 / 0.15);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.30), 0 2px 6px oklch(0 0 0 / 0.20);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.35), 0 4px 12px oklch(0 0 0 / 0.25);
    --shadow-xl: 0 24px 56px oklch(0 0 0 / 0.45), 0 8px 20px oklch(0 0 0 / 0.30);
    --shadow-2xl: 0 40px 80px oklch(0 0 0 / 0.55), 0 12px 28px oklch(0 0 0 / 0.35);

    --inset-highlight: inset 0 1px 1px oklch(1 0 0 / 0.12);
    --inset-highlight-strong: inset 0 1px 2px oklch(1 0 0 / 0.15), inset 0 -1px 1px oklch(0 0 0 / 0.2);
  }
}

/* ==========================================================================
   ANIMATABLE GRADIENT ANGLE (for aurora + shimmer)
   ========================================================================== */
@property --gradient-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@property --shimmer-x {
  syntax: '<percentage>';
  initial-value: -100%;
  inherits: false;
}

/* ==========================================================================
   MODERN RESET
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  color: var(--text-primary);
  background-color: var(--bg-base);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  /* Animated Aurora Mesh — slowly drifting light blobs */
  background-image:
    radial-gradient(ellipse 80% 60% at 15% 20%, oklch(0.82 0.11 240 / 0.25), transparent 60%),
    radial-gradient(ellipse 70% 50% at 85% 15%, oklch(0.85 0.10 280 / 0.18), transparent 55%),
    radial-gradient(ellipse 90% 70% at 50% 85%, oklch(0.88 0.08 200 / 0.22), transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 80%, oklch(0.80 0.12 160 / 0.12), transparent 50%);
  background-attachment: fixed;
  background-size: 200% 200%, 200% 200%, 200% 200%, 200% 200%;
  animation: aurora-drift 30s ease-in-out infinite;
}

@keyframes aurora-drift {
  0%, 100% { background-position: 0% 0%, 100% 0%, 50% 100%, 100% 100%; }
  25%      { background-position: 30% 10%, 70% 20%, 60% 80%, 80% 90%; }
  50%      { background-position: 50% 20%, 50% 10%, 40% 70%, 60% 80%; }
  75%      { background-position: 20% 30%, 80% 25%, 55% 85%, 70% 70%; }
}

/* ==========================================================================
   CONTAINER
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  text-wrap: balance;
}

h1 { font-size: var(--text-3xl); font-weight: 800; }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-md); }
h6 { font-size: var(--text-base); }

p {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  text-wrap: pretty;
}

a {
  color: var(--brand-600);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-standard);
}
a:hover { color: var(--brand-700); }

strong { font-weight: 700; color: var(--text-primary); }
small { font-size: var(--text-xs); }
code, pre { font-family: var(--font-mono); font-size: 0.9em; }

/* ==========================================================================
   SECTION HEADERS
   ========================================================================== */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-2xl);
}

.section-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--glass-2-bg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  border: 1px solid var(--glass-2-border);
  color: var(--brand-600);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm), var(--inset-highlight);
  margin-bottom: var(--space-md);
}

.section-pill::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand-500);
  box-shadow: 0 0 8px var(--brand-500);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: var(--text-md);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* ==========================================================================
   GLASS SURFACES — 3 Depth Levels with Specular Highlights
   ========================================================================== */

/* Base mixin-like class for all glass surfaces */
.glass {
  position: relative;
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  border: 1px solid var(--glass-2-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), var(--inset-highlight);
  overflow: hidden;
  isolation: isolate;
}

/* Specular highlight overlay — simulates light refraction on glass */
.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glass-specular);
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
  opacity: 0.8;
}

/* Bottom shadow gradient — gives glass "weight" */
.glass::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 0%,
    transparent 80%,
    oklch(0.2 0.04 255 / 0.03) 100%
  );
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
}

.glass > * { position: relative; z-index: 2; }

/* Depth Level 1: Subtle */
.glass-subtle {
  background: var(--glass-1-bg);
  -webkit-backdrop-filter: var(--glass-1-blur);
  backdrop-filter: var(--glass-1-blur);
  border: 1px solid var(--glass-1-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm), var(--inset-highlight);
}

/* Depth Level 2: Default (cards) */
.glass-card,
.card-panel,
.glass-panel {
  background: var(--glass-2-bg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  border: 1px solid var(--glass-2-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), var(--inset-highlight);
  padding: var(--space-xl);
  transition:
    transform var(--dur-normal) var(--ease-spring),
    box-shadow var(--dur-normal) var(--ease-out-quart),
    background var(--dur-normal) var(--ease-standard),
    border-color var(--dur-normal) var(--ease-standard);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.glass-card::before,
.card-panel::before,
.glass-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glass-specular);
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
}

.glass-card > *,
.card-panel > *,
.glass-panel > * {
  position: relative;
  z-index: 2;
}

.glass-card:hover,
.card-panel:hover,
.glass-panel:hover {
  transform: translateY(-4px) scale(1.005);
  background: var(--glass-bg-hover);
  border-color: oklch(1 0 0 / 0.85);
  box-shadow: var(--shadow-lg), var(--inset-highlight-strong);
}

/* Depth Level 3: Prominent (dropdowns, modals, nav) */
.glass-prominent {
  background: var(--glass-3-bg);
  -webkit-backdrop-filter: var(--glass-3-blur);
  backdrop-filter: var(--glass-3-blur);
  border: 1px solid var(--glass-3-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl), var(--inset-highlight-strong);
}

/* Interactive card variant with pointer-aware glow */
.glass-interactive {
  cursor: pointer;
}

.glass-interactive:hover {
  border-color: var(--brand-400);
  box-shadow: var(--shadow-lg), var(--inset-highlight-strong), 0 0 0 1px var(--brand-400);
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--glass-3-bg);
  -webkit-backdrop-filter: var(--glass-3-blur);
  backdrop-filter: var(--glass-3-blur);
  border-bottom: 1px solid var(--glass-3-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--dur-normal) var(--ease-standard);
}

.navbar.is-scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  gap: var(--space-md);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo:hover { color: var(--text-primary); }

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--grad-brand);
  color: white;
  display: grid;
  place-items: center;
  font-size: var(--text-md);
  font-weight: 800;
  box-shadow: var(--glow-brand), var(--inset-highlight-strong);
  position: relative;
  overflow: hidden;
}

.brand-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, oklch(1 0 0 / 0.3), transparent 50%);
  border-radius: inherit;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-xs) 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard);
}

.nav-link:hover,
.nav-link.active {
  color: var(--brand-600);
  border-bottom-color: var(--brand-500);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ==========================================================================
   CURRENCY SWITCHER
   ========================================================================== */
.currency-switcher-wrapper {
  position: relative;
  display: inline-block;
}

.currency-switcher-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--glass-2-bg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  border: 1px solid var(--glass-2-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-standard);
  user-select: none;
  font-family: inherit;
  white-space: nowrap;
  box-shadow: var(--shadow-sm), var(--inset-highlight);
}

.currency-switcher-btn:hover,
.currency-switcher-wrapper.active .currency-switcher-btn {
  background: var(--glass-bg-hover);
  border-color: var(--brand-400);
  color: var(--brand-600);
  box-shadow: var(--glow-brand);
}

.curr-flag { font-size: var(--text-md); line-height: 1; }
.curr-code { font-weight: 800; }
.curr-symbol { color: var(--text-muted); font-size: var(--text-xs); }

.curr-chevron {
  transition: transform var(--dur-normal) var(--ease-spring);
  color: var(--text-muted);
  margin-left: 2px;
}

.currency-switcher-wrapper.active .curr-chevron {
  transform: rotate(180deg);
}

.currency-dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 300px;
  max-width: calc(100vw - 2 * var(--container-pad));
  max-height: 400px;
  overflow-y: auto;
  background: var(--glass-3-bg);
  -webkit-backdrop-filter: var(--glass-3-blur);
  backdrop-filter: var(--glass-3-blur);
  border: 1px solid var(--glass-3-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl), var(--inset-highlight-strong);
  z-index: var(--z-dropdown);
  padding: var(--space-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.96);
  transform-origin: top right;
  transition: opacity var(--dur-normal) var(--ease-spring),
              transform var(--dur-normal) var(--ease-spring),
              visibility var(--dur-normal);
}

.currency-switcher-wrapper.active .currency-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.currency-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--text-primary);
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard);
}

.currency-item:hover {
  background: oklch(0.68 0.17 240 / 0.08);
  color: var(--brand-600);
}

.currency-item.selected {
  background: oklch(0.68 0.17 240 / 0.12);
  color: var(--brand-600);
  font-weight: 700;
}

.currency-item-left {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.currency-item .curr-sym-tag {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-muted);
  background: oklch(0.2 0.04 255 / 0.06);
  padding: 2px var(--space-xs);
  border-radius: var(--radius-xs);
}

.currency-item.selected .curr-sym-tag {
  background: oklch(0.68 0.17 240 / 0.15);
  color: var(--brand-600);
}

.currency-item .curr-check {
  color: var(--brand-500);
  font-weight: 800;
}

/* Mobile nav */
.mobile-menu-toggle {
  display: none;
  background: var(--glass-2-bg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  border: 1px solid var(--glass-2-border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  color: var(--text-primary);
  font-size: var(--text-lg);
  line-height: 1;
  box-shadow: var(--shadow-sm);
}

.mobile-menu-drawer {
  display: none;
  flex-direction: column;
  padding: var(--space-lg) var(--container-pad) var(--space-xl);
  background: var(--glass-3-bg);
  -webkit-backdrop-filter: var(--glass-3-blur);
  backdrop-filter: var(--glass-3-blur);
  border-bottom: 1px solid var(--glass-3-border);
  box-shadow: var(--shadow-lg);
}

.mobile-menu-drawer.open {
  display: flex;
  animation: drawer-slide var(--dur-normal) var(--ease-out-expo);
}

@keyframes drawer-slide {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.mobile-nav-links a {
  color: var(--text-primary);
  font-size: var(--text-md);
  font-weight: 600;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--glass-1-border);
}

/* ==========================================================================
   BUTTONS — with shimmer and proper focus-visible
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-decoration: none;
  transition:
    transform var(--dur-fast) var(--ease-spring),
    box-shadow var(--dur-normal) var(--ease-out-quart),
    background var(--dur-normal) var(--ease-standard),
    border-color var(--dur-normal) var(--ease-standard),
    color var(--dur-fast) var(--ease-standard);
  border: 1px solid transparent;
  white-space: nowrap;
  line-height: 1.4;
  user-select: none;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.btn:active { transform: scale(0.96); }

/* Focus-visible ring — keyboard accessible */
.btn:focus-visible,
.form-control:focus-visible,
.currency-switcher-btn:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
}

/* Primary — gradient with shimmer sweep */
.btn-primary {
  background: var(--grad-brand);
  color: white;
  border: none;
  box-shadow: var(--glow-brand), var(--inset-highlight-strong);
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    oklch(1 0 0 / 0.25),
    transparent
  );
  transform: translateX(var(--shimmer-x));
  transition: --shimmer-x var(--dur-slow) var(--ease-out-quart);
  z-index: -1;
}

.btn-primary:hover {
  background: var(--grad-brand-hover);
  color: white;
  box-shadow: 0 8px 32px oklch(0.68 0.17 240 / 0.50), var(--inset-highlight-strong);
  transform: translateY(-2px);
  --shimmer-x: 100%;
}

.btn-primary:active {
  transform: scale(0.97);
  --shimmer-x: -100%;
}

/* Secondary glass */
.btn-secondary,
.btn-glass {
  background: var(--glass-2-bg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  color: var(--text-primary);
  border: 1px solid var(--glass-2-border);
  box-shadow: var(--shadow-sm), var(--inset-highlight);
}

.btn-secondary:hover,
.btn-glass:hover {
  background: var(--glass-bg-hover);
  border-color: oklch(1 0 0 / 0.85);
  color: var(--brand-600);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), var(--inset-highlight-strong);
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--brand-600);
  border: 1.5px solid oklch(0.68 0.17 240 / 0.35);
}

.btn-outline:hover {
  background: oklch(0.68 0.17 240 / 0.08);
  border-color: var(--brand-500);
  color: var(--brand-700);
}

/* WhatsApp / Emerald */
.btn-whatsapp {
  background: var(--grad-emerald);
  color: white;
  border: none;
  box-shadow: var(--glow-emerald), var(--inset-highlight-strong);
}

.btn-whatsapp:hover {
  background: linear-gradient(135deg, var(--emerald-600), oklch(0.52 0.15 155));
  color: white;
  box-shadow: 0 8px 32px oklch(0.72 0.19 155 / 0.45), var(--inset-highlight-strong);
  transform: translateY(-2px);
}

/* Danger */
.btn-danger {
  background: var(--grad-rose);
  color: white;
  border: none;
  box-shadow: var(--glow-rose), var(--inset-highlight-strong);
}

.btn-danger:hover {
  background: linear-gradient(135deg, var(--rose-600), oklch(0.50 0.20 18));
  color: white;
  transform: translateY(-2px);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: none;
}

.btn-ghost:hover {
  background: oklch(0.2 0.04 255 / 0.06);
  color: var(--text-primary);
}

/* Sizes */
.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--text-md);
  font-weight: 800;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* ==========================================================================
   FORM CONTROLS
   ========================================================================== */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.form-control {
  width: 100%;
  padding: var(--space-md) var(--space-md);
  font-size: var(--text-base);
  font-family: inherit;
  color: var(--text-primary);
  background: var(--glass-2-bg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  border: 1px solid var(--glass-2-border);
  border-radius: var(--radius-sm);
  box-shadow: inset 0 1px 2px oklch(0.2 0.04 255 / 0.04), var(--shadow-xs);
  outline: none;
  transition: all var(--dur-fast) var(--ease-standard);
}

.form-control:focus {
  background: oklch(1 0 0 / 0.9);
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px oklch(0.68 0.17 240 / 0.15), var(--shadow-sm);
}

.form-control::placeholder {
  color: var(--text-muted);
}

/* Ensure 16px+ on mobile to prevent iOS zoom */
@media (max-width: 520px) {
  .form-control { font-size: 16px; }
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%234A6FA5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  background-size: 14px;
  padding-right: var(--space-xl);
}

/* ==========================================================================
   BADGES
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 3px var(--space-sm);
  font-size: var(--text-xs);
  font-weight: 800;
  border-radius: var(--radius-full);
  line-height: 1.3;
  letter-spacing: var(--tracking-wide);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.badge-primary {
  background: oklch(0.68 0.17 240 / 0.12);
  color: var(--brand-600);
  border: 1px solid oklch(0.68 0.17 240 / 0.25);
}

.badge-info {
  background: oklch(0.62 0.15 230 / 0.12);
  color: oklch(0.50 0.15 230);
  border: 1px solid oklch(0.62 0.15 230 / 0.25);
}

.badge-secondary {
  background: var(--glass-2-bg);
  color: var(--text-secondary);
  border: 1px solid var(--glass-2-border);
}

.badge-success {
  background: oklch(0.72 0.19 155 / 0.12);
  color: var(--emerald-600);
  border: 1px solid oklch(0.72 0.19 155 / 0.25);
}

.badge-warning {
  background: oklch(0.80 0.16 70 / 0.12);
  color: var(--amber-600);
  border: 1px solid oklch(0.80 0.16 70 / 0.25);
}

.badge-danger {
  background: oklch(0.65 0.22 18 / 0.12);
  color: var(--rose-600);
  border: 1px solid oklch(0.65 0.22 18 / 0.25);
}

.badge-dark {
  background: var(--text-primary);
  color: var(--text-inverse);
  border: 1px solid transparent;
}

/* ==========================================================================
   TABLES
   ========================================================================== */
.table-card {
  background: var(--glass-2-bg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  border: 1px solid var(--glass-2-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), var(--inset-highlight);
  overflow: hidden;
}

.table-header {
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--glass-2-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  background: oklch(1 0 0 / 0.15);
}

.table-title {
  font-size: var(--text-md);
  font-weight: 800;
  color: var(--text-primary);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 600px;
}

.custom-table th {
  background: oklch(1 0 0 / 0.20);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--glass-2-border);
  white-space: nowrap;
}

.custom-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--glass-1-border);
  font-size: var(--text-sm);
  color: var(--text-primary);
  vertical-align: middle;
}

.custom-table tbody tr {
  transition: background var(--dur-fast) var(--ease-standard);
}

.custom-table tbody tr:hover {
  background: oklch(1 0 0 / 0.25);
}

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

/* ==========================================================================
   STAT CARDS
   ========================================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--glass-2-bg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  border: 1px solid var(--glass-2-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm), var(--inset-highlight);
  transition: transform var(--dur-normal) var(--ease-spring),
              box-shadow var(--dur-normal) var(--ease-out-quart),
              background var(--dur-normal) var(--ease-standard);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.stat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glass-specular);
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
  opacity: 0.6;
}

.stat-card > * { position: relative; z-index: 2; }

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md), var(--inset-highlight-strong);
  background: var(--glass-bg-hover);
}

.stat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.stat-label {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-secondary);
}

.stat-icon-wrapper {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: var(--text-lg);
  background: var(--glass-2-bg);
  border: 1px solid var(--glass-2-border);
  box-shadow: var(--inset-highlight);
}

.stat-val {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-xs);
  line-height: 1;
}

.stat-desc {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ==========================================================================
   ALERT TOASTS
   ========================================================================== */
.alert-toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-lg);
  -webkit-backdrop-filter: var(--glass-2-blur);
  backdrop-filter: var(--glass-2-blur);
  box-shadow: var(--shadow-sm), var(--inset-highlight);
  border: 1px solid var(--glass-2-border);
}

.alert-success {
  background: oklch(0.95 0.05 155 / 0.75);
  border-color: oklch(0.72 0.19 155 / 0.30);
  color: oklch(0.35 0.12 155);
}

.alert-danger {
  background: oklch(0.95 0.05 18 / 0.75);
  border-color: oklch(0.65 0.22 18 / 0.30);
  color: oklch(0.40 0.18 18);
}

.alert-info {
  background: oklch(0.95 0.04 240 / 0.75);
  border-color: oklch(0.68 0.17 240 / 0.30);
  color: oklch(0.40 0.15 245);
}

.alert-warning {
  background: oklch(0.96 0.05 70 / 0.75);
  border-color: oklch(0.80 0.16 70 / 0.30);
  color: oklch(0.42 0.14 65);
}

/* ==========================================================================
   CATEGORY FILTER BAR
   ========================================================================== */
.category-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 oklch(0.68 0.17 240 / 0.30); }
  50% { box-shadow: 0 0 0 12px oklch(0.68 0.17 240 / 0); }
}

.animate-pulse-glow {
  animation: pulse-glow 3s infinite;
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-in-up {
  animation: fade-in-up var(--dur-slow) var(--ease-out-expo) both;
}

@keyframes shimmer-sweep {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

/* Hide nav links on tablet */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .mobile-menu-toggle { display: block; }
}

/* Tablet */
@media (max-width: 768px) {
  .glass-card,
  .card-panel,
  .glass-panel {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  /* Horizontal scroll for filter pills */
  .category-filter-bar {
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--space-sm);
    scrollbar-width: none;
  }
  .category-filter-bar::-webkit-scrollbar { display: none; }
  .category-filter-bar .btn { flex-shrink: 0; }
}

/* Mobile */
@media (max-width: 520px) {
  .nav-inner {
    height: 64px;
  }

  .brand-logo {
    font-size: var(--text-md);
  }

  .currency-switcher-btn .curr-name { display: none; }
  .currency-switcher-btn {
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--text-xs);
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .section-header {
    margin-bottom: var(--space-xl);
  }
}

/* Large desktop — slightly larger type */
@media (min-width: 1600px) {
  :root {
    --container-max: 1480px;
  }
}

/* Ultra-wide — cap and center */
@media (min-width: 2000px) {
  :root {
    --container-max: 1600px;
  }
}

/* ==========================================================================
   ACCESSIBILITY — Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  body {
    animation: none !important;
  }
}

/* ==========================================================================
   SCROLLBAR STYLING (subtle)
   ========================================================================== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: oklch(0.2 0.04 255 / 0.15);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: oklch(0.2 0.04 255 / 0.25);
  background-clip: padding-box;
}

/* Selection */
::selection {
  background: oklch(0.68 0.17 240 / 0.20);
  color: var(--text-primary);
}