/* ==========================================================================
   COMMERONIX - MODERN DESIGN SYSTEM & STYLESHEET
   A sleek, modern dark-themed multi-tool calculator platform.
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

/* --- CSS Variables & Design Tokens --- */
:root,
[data-theme="dark"] {
  /* Color Palette (Dark Default) */
  --bg-main: #0a0e17;
  --bg-surface: #111827;
  --bg-surface-raised: #1e293b;
  --bg-surface-card: rgba(17, 24, 39, 0.75);
  --bg-surface-glass: rgba(30, 41, 59, 0.55);
  --bg-input: #0f172a;
  --bg-input-focus: #162036;

  /* Accent Colors */
  --accent-primary: #10b981;       /* Emerald */
  --accent-primary-hover: #059669;
  --accent-primary-glow: rgba(16, 185, 129, 0.25);
  
  --accent-cyan: #06b6d4;          /* Vivid Cyan */
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  
  --accent-indigo: #6366f1;        /* Indigo */
  --accent-amber: #f59e0b;         /* Amber */
  --accent-rose: #f43f5e;          /* Rose / Error */

  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0b0f19;

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: #10b981;
  --border-card: rgba(255, 255, 255, 0.12);
  --border-highlight: rgba(16, 185, 129, 0.4);

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px var(--accent-primary-glow);
  --shadow-glow-cyan: 0 0 25px var(--accent-cyan-glow);

  /* Typography */
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --max-width: 1200px;
}

/* --- Light Theme Token Overrides --- */
[data-theme="light"] {
  /* Color Palette (Clean Light) */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-raised: #f1f5f9;
  --bg-surface-card: rgba(255, 255, 255, 0.95);
  --bg-surface-glass: rgba(241, 245, 249, 0.85);
  --bg-input: #ffffff;
  --bg-input-focus: #f8fafc;

  /* Accent Colors */
  --accent-primary: #059669;       /* Deep Emerald */
  --accent-primary-hover: #047857;
  --accent-primary-glow: rgba(5, 150, 105, 0.15);
  
  --accent-cyan: #0284c7;          /* Vivid Cyan / Blue */
  --accent-cyan-glow: rgba(2, 132, 199, 0.15);
  
  --accent-indigo: #4f46e5;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;

  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  /* Borders & Dividers */
  --border-subtle: rgba(15, 23, 42, 0.08);
  --border-focus: #059669;
  --border-card: rgba(15, 23, 42, 0.1);
  --border-highlight: rgba(5, 150, 105, 0.35);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 0 25px var(--accent-primary-glow);
  --shadow-glow-cyan: 0 0 25px var(--accent-cyan-glow);
}

/* --- Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark light;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(at 0% 0%, rgba(16, 185, 129, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(6, 182, 212, 0.08) 0px, transparent 50%),
    radial-gradient(at 50% 100%, rgba(99, 102, 241, 0.05) 0px, transparent 50%);
  background-attachment: fixed;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

[data-theme="light"] body {
  background-image: 
    radial-gradient(at 0% 0%, rgba(5, 150, 105, 0.05) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(2, 132, 199, 0.05) 0px, transparent 50%),
    radial-gradient(at 50% 100%, rgba(79, 70, 229, 0.03) 0px, transparent 50%);
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--text-primary);
}

/* Accessible Focus States */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
}

/* Number display standard */
.num-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* --- Layout Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.main-content {
  flex: 1 0 auto;
  padding-top: 2rem;
  padding-bottom: 4rem;
}

/* --- Live Ticker Strip --- */
.ticker-wrap {
  width: 100%;
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
  height: 38px;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 40;
}

.ticker-label {
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  color: var(--text-inverse);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0 0.85rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 2;
  box-shadow: 2px 0 8px rgba(0,0,0,0.3);
}

.ticker-pulse {
  width: 7px;
  height: 7px;
  background-color: var(--text-inverse);
  border-radius: 50%;
  position: relative;
}

.ticker-pulse::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: var(--text-inverse);
  animation: pulse-radar 1.6s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes pulse-radar {
  0% { transform: scale(1); opacity: 0.9; }
  75%, 100% { transform: scale(3); opacity: 0; }
}

.ticker-track {
  display: flex;
  overflow: hidden;
  white-space: nowrap;
  width: 100%;
}

.ticker-content {
  display: inline-flex;
  gap: 2.5rem;
  padding-left: 2rem;
  animation: ticker 40s linear infinite;
  align-items: center;
}

.ticker-wrap:hover .ticker-content {
  animation-play-state: paused;
}

@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.ticker-pair {
  font-weight: 600;
  color: var(--text-primary);
}

.ticker-val {
  color: var(--text-primary);
}

.ticker-badge {
  font-size: 0.7rem;
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-primary);
  font-weight: 600;
}

.ticker-badge.down {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
}

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

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-inverse);
  box-shadow: 0 4px 12px var(--accent-primary-glow);
  flex-shrink: 0;
}

.brand-logo img.logo-icon-svg {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 14px var(--accent-primary-glow);
  flex-shrink: 0;
  display: block;
  transition: transform var(--transition-bounce);
}

.brand-logo:hover img.logo-icon-svg {
  transform: scale(1.08) rotate(3deg);
}

.brand-full-logo-img {
  height: 42px;
  width: auto;
  display: block;
  max-width: 100%;
}

.brand-accent {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.5rem;
}

.nav-link {
  color: var(--text-secondary);
  padding: 0.55rem 0.95rem;
  font-size: 0.925rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: var(--text-primary);
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  font-weight: 600;
}

.nav-cta {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  color: var(--text-inverse) !important;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  box-shadow: 0 2px 10px var(--accent-primary-glow);
}

.nav-cta:hover {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: 0 4px 15px var(--accent-primary-glow);
}

/* --- Theme Toggle Button --- */
.theme-toggle-btn {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-left: 0.5rem;
  flex-shrink: 0;
}

.theme-toggle-btn:hover {
  background: var(--bg-surface);
  border-color: var(--border-focus);
  color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal);
}

.theme-toggle-btn:hover svg {
  transform: rotate(15deg);
}

/* In Dark Theme (default): show sun icon, hide moon icon */
:root[data-theme="dark"] .sun-icon,
:root:not([data-theme="light"]) .sun-icon {
  display: block;
}
:root[data-theme="dark"] .moon-icon,
:root:not([data-theme="light"]) .moon-icon {
  display: none;
}

/* In Light Theme: show moon icon, hide sun icon */
:root[data-theme="light"] .sun-icon {
  display: none;
}
:root[data-theme="light"] .moon-icon {
  display: block;
}

/* Light Theme Component Tweaks */
[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.9);
}

[data-theme="light"] .mobile-drawer {
  background: rgba(255, 255, 255, 0.98);
}

[data-theme="light"] .ticker-wrap {
  background: #f1f5f9;
}

[data-theme="light"] .card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-md);
}

[data-theme="light"] .card:hover {
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-lg);
}

[data-theme="light"] .data-table tbody tr:hover {
  background: rgba(5, 150, 105, 0.04);
}

[data-theme="light"] .nav-link:hover {
  background: rgba(15, 23, 42, 0.05);
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-primary);
}

.mobile-toggle svg {
  width: 26px;
  height: 26px;
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 110px;
  left: 0;
  width: 100%;
  height: calc(100vh - 110px);
  background: rgba(10, 14, 23, 0.98);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-subtle);
  padding: 2rem 1.5rem;
  flex-direction: column;
  gap: 1rem;
  z-index: 45;
  overflow-y: auto;
}

.mobile-drawer.open {
  display: flex;
}

.mobile-drawer .nav-link {
  font-size: 1.1rem;
  padding: 0.85rem 1rem;
  width: 100%;
  display: block;
}

/* --- Hero Section --- */
.hero {
  padding: 3.5rem 0 2.5rem;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
  max-width: 850px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1.2;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  color: var(--text-inverse);
  box-shadow: 0 4px 14px var(--accent-primary-glow);
}

.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-primary-glow);
  color: var(--text-inverse);
}

.btn-secondary {
  background: var(--bg-surface-raised);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  background: #283548;
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-card);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(16, 185, 129, 0.08);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.825rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* --- Cards & Glassmorphic Surfaces --- */
.card {
  background: var(--bg-surface-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: var(--shadow-lg);
}

.card-interactive {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.card-interactive:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.card-icon.emerald {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.card-icon.cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.card-icon.indigo {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.card-badge {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

.card-badge.live {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-primary);
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card-footer-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-primary);
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.25rem;
  margin-top: auto;
}

/* --- Grids --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

/* --- Feature Highlights (Why Commeronix) --- */
.feature-box {
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color var(--transition-fast);
}

.feature-box:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  display: inline-block;
}

.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* --- Section Headings --- */
.section-header {
  text-align: center;
  margin-bottom: 2.75rem;
}

.section-tag {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0.75rem auto 0;
}

/* --- Calculator App Containers & Forms --- */
.calculator-app {
  max-width: 780px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.calculator-app::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-cyan), transparent);
}

.calculator-header {
  text-align: center;
  margin-bottom: 2rem;
}

.calculator-header h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  margin-bottom: 0.5rem;
}

.calculator-header p {
  font-size: 1rem;
}

/* Form Controls */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-label-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon-prefix {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  pointer-events: none;
  font-family: var(--font-mono);
  font-weight: 600;
  display: flex;
  align-items: center;
}

.form-input, .form-select {
  width: 100%;
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  font-size: 1.05rem;
  font-family: var(--font-main);
  transition: all var(--transition-fast);
  appearance: none;
}

.form-input.has-prefix {
  padding-left: 2.75rem;
}

.form-input:hover, .form-select:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background-color: var(--bg-input-focus);
}

.form-input:focus, .form-select:focus {
  border-color: var(--border-focus);
  background-color: var(--bg-input-focus);
  box-shadow: 0 0 0 3px var(--accent-primary-glow);
  outline: none;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.25rem;
  padding-right: 2.75rem;
  cursor: pointer;
}

/* Range Sliders */
.range-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-range {
  width: 100%;
  height: 6px;
  background: var(--bg-surface-raised);
  border-radius: var(--radius-full);
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
  accent-color: var(--accent-primary);
}

.form-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-primary-glow);
  transition: transform var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Swap Row */
.converter-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.btn-swap {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-card);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 0.15rem;
  flex-shrink: 0;
}

.btn-swap:hover {
  background: var(--accent-primary);
  color: var(--text-inverse);
  transform: rotate(180deg);
  border-color: var(--accent-primary);
  box-shadow: 0 0 15px var(--accent-primary-glow);
}

.btn-swap svg {
  width: 20px;
  height: 20px;
}

/* Quick Action Chips */
.chips-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.chip-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.chip-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.25rem 0.75rem;
  font-size: 0.775rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chip-btn:hover {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

/* Result Box */
.result-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(6, 182, 212, 0.08));
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-top: 2rem;
  text-align: center;
  position: relative;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-caption {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.result-main {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  word-break: break-word;
}

.result-rate-detail {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.result-rate-item strong {
  color: var(--accent-cyan);
}

.rate-timestamp {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* Category Tabs (For Unit Converter) */
.category-tabs {
  display: flex;
  background: var(--bg-surface-raised);
  padding: 0.35rem;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  gap: 0.35rem;
  border: 1px solid var(--border-subtle);
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.65rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-card);
}

/* Loan/EMI Metrics Display Grid */
.loan-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-align: center;
}

.metric-card.highlight {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.15));
  border-color: rgba(16, 185, 129, 0.4);
}

.metric-label {
  font-size: 0.775rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.metric-value {
  font-size: 1.45rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.metric-card.highlight .metric-value {
  color: var(--accent-primary);
}

/* Ratio Bar */
.ratio-bar-wrap {
  margin-bottom: 2rem;
}

.ratio-legend {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.legend-dot.principal { background: var(--accent-primary); }
.legend-dot.interest { background: var(--accent-cyan); }

.ratio-bar {
  height: 10px;
  width: 100%;
  background: var(--bg-surface-raised);
  border-radius: var(--radius-full);
  overflow: hidden;
  display: flex;
}

.ratio-segment-principal {
  background: var(--accent-primary);
  height: 100%;
  transition: width var(--transition-normal);
}

.ratio-segment-interest {
  background: var(--accent-cyan);
  height: 100%;
  transition: width var(--transition-normal);
}

/* Amortization Schedule Table */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin-top: 1.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
  font-family: var(--font-mono);
}

.data-table th {
  background: var(--bg-surface-raised);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Formula Breakdown Box */
.formula-box {
  background: rgba(15, 23, 42, 0.6);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.formula-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--accent-cyan);
  font-weight: 700;
  margin-bottom: 0.35rem;
}

/* Alerts & Status Messages */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-error {
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #fda4af;
}

.alert-info {
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: #67e8f9;
}

/* --- SEO & Educational Content Sections --- */
.seo-content-section {
  max-width: 850px;
  margin: 4rem auto 0;
  padding: 2.5rem;
  background: var(--bg-surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
}

.seo-content-section h2 {
  font-size: 1.65rem;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.seo-content-section h2:first-of-type {
  margin-top: 0;
}

.seo-content-section h3 {
  font-size: 1.25rem;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.seo-content-section p {
  margin-bottom: 1.25rem;
  line-height: 1.75;
}

.seo-content-section ul, .seo-content-section ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.seo-content-section li {
  margin-bottom: 0.5rem;
}

/* FAQ Accordion */
.faq-section {
  margin-top: 2rem;
}

.faq-item {
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.25rem 0;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  padding: 0;
}

.faq-question:hover {
  color: var(--accent-primary);
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
  color: var(--text-muted);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-primary);
}

.faq-answer {
  display: none;
  padding-top: 0.85rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  display: block;
}



/* --- Static Pages: About, Contact, Privacy Policy --- */
.article-container {
  max-width: 820px;
  margin: 0 auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 3rem;
  box-shadow: var(--shadow-md);
}

.article-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1.5rem;
}

.article-header h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 0.75rem;
}

.article-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-body h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 0.85rem;
}

.article-body h3 {
  font-size: 1.2rem;
  margin-top: 1.5rem;
  margin-bottom: 0.65rem;
}

.article-body p {
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

.article-body ul, .article-body ol {
  margin-left: 1.75rem;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.article-body li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

/* Contact Details Card */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.contact-card {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.contact-card h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.contact-email-link {
  font-size: 1.1rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-primary);
  display: inline-block;
  margin-top: 0.5rem;
}

/* --- Footer --- */
.site-footer {
  background: #070a12;
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.9rem;
  margin-top: 0.75rem;
  max-width: 320px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  max-width: 700px;
  line-height: 1.6;
}

/* --- Responsive Media Queries (Mobile & Tablet Optimization) --- */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .navbar {
    height: 64px;
  }

  .brand-logo {
    font-size: 1.2rem;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
  }

  .nav-links {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .mobile-drawer {
    top: 102px;
    height: calc(100vh - 102px);
    padding: 1.5rem 1.25rem;
  }

  .converter-row {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .btn-swap {
    margin: 0.25rem auto;
    transform: rotate(90deg);
  }

  .btn-swap:hover {
    transform: rotate(270deg);
  }

  .loan-summary-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .article-container, .calculator-app {
    padding: 1.5rem 1.15rem;
  }
}

@media (max-width: 600px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .ticker-wrap {
    height: 34px;
  }

  .ticker-label {
    padding: 0 0.5rem;
    font-size: 0.7rem;
  }

  .ticker-item {
    font-size: 0.75rem;
    margin-right: 1.25rem;
  }

  .hero {
    padding: 2rem 0 1.5rem;
  }

  .hero-title {
    font-size: clamp(1.75rem, 6.5vw, 2.4rem);
  }

  .hero-subtitle {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr !important;
    gap: 1.25rem;
  }

  .category-tabs {
    display: flex;
    overflow-x: auto;
    flex-wrap: nowrap;
    gap: 0.4rem;
    padding-bottom: 0.5rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .category-tabs::-webkit-scrollbar {
    display: none;
  }

  .category-tab {
    flex-shrink: 0;
    white-space: nowrap;
    font-size: 0.82rem;
    padding: 0.5rem 0.85rem;
  }

  .table-wrap {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: 1rem;
    border-radius: var(--radius-md);
  }

  .data-table {
    min-width: 560px;
  }

  .range-container {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .range-container .form-input {
    width: 100%;
  }

  .calc-wrapper {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .calc-container {
    padding: 1.15rem 0.85rem;
  }

  .calc-display {
    padding: 0.85rem 1rem;
    min-height: 90px;
  }

  .calc-main {
    font-size: clamp(1.6rem, 7vw, 2.2rem);
  }

  .calc-grid {
    gap: 0.4rem;
  }

  .calc-btn {
    height: 48px;
    font-size: 1.1rem;
  }

  .calc-sci-grid {
    gap: 0.35rem;
  }

  .calc-btn.sci {
    height: 36px;
    font-size: 0.78rem;
  }

  .calc-tab-btn {
    padding: 0.4rem 0.65rem;
    font-size: 0.82rem;
  }
}

/* --- Live Calculator Styles --- */
.calc-wrapper {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 900px) {
  .calc-wrapper {
    grid-template-columns: 1fr;
  }
}

.calc-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
}

.calc-display {
  background: var(--bg-input);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  text-align: right;
  margin-bottom: 1.25rem;
  min-height: 110px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.calc-expr {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-secondary);
  min-height: 1.5rem;
  word-break: break-all;
  overflow-x: auto;
}

.calc-main {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  word-break: break-all;
  line-height: 1.2;
}

.calc-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 0.5rem;
}

.calc-tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  transition: all var(--transition-fast);
}

.calc-tab-btn:hover {
  background: var(--bg-surface-raised);
  color: var(--text-primary);
}

.calc-tab-btn.active {
  background: var(--accent-primary-glow);
  color: var(--accent-primary);
  border-color: var(--border-focus);
}

.calc-mode-btn {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.calc-mode-btn:hover, .calc-mode-btn.active {
  background: var(--accent-primary-glow);
  color: var(--accent-primary);
  border-color: var(--border-focus);
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
}

.calc-sci-grid {
  display: none;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.calc-btn {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.calc-btn:hover {
  background: var(--bg-input-focus);
  border-color: var(--border-card);
  transform: translateY(-1px);
}

.calc-btn.op {
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.08);
}

.calc-btn.op:hover {
  background: rgba(6, 182, 212, 0.18);
  border-color: var(--accent-cyan);
}

.calc-btn.action {
  color: var(--accent-amber);
}

.calc-btn.equals {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  color: var(--text-inverse);
  font-weight: 700;
  grid-column: span 2;
  box-shadow: 0 4px 12px var(--accent-primary-glow);
}

.calc-btn.equals:hover {
  opacity: 0.95;
  box-shadow: 0 6px 16px var(--accent-primary-glow);
}

.calc-btn.sci {
  font-size: 0.9rem;
  height: 44px;
  color: var(--text-secondary);
}

.calc-btn.sci:hover {
  color: var(--accent-primary);
}

/* History Card */
.calc-history-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  max-height: 540px;
  display: flex;
  flex-direction: column;
}

.history-list {
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-right: 0.35rem;
  margin-top: 1rem;
}

.history-item {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.history-item:hover {
  border-color: var(--border-focus);
  background: var(--bg-input-focus);
  transform: translateX(2px);
}

.history-expr {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.history-res {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-top: 0.2rem;
}

.history-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 0.2rem;
}

/* Toast */
.calc-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--bg-surface-raised);
  border: 1px solid var(--accent-primary);
  color: var(--text-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 600;
  z-index: 999;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all var(--transition-normal);
}

.calc-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   ADVANCED UI ANIMATIONS & MICRO-INTERACTIONS
   ========================================================================== */

/* 1. Ambient Background Aurora Glow Mesh */
.hero {
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 650px;
  height: 450px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(16, 185, 129, 0.08) 50%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
  animation: auroraFloat 12s ease-in-out infinite alternate;
}

@keyframes auroraFloat {
  0% {
    transform: translateX(-50%) translateY(0) scale(1);
    opacity: 0.7;
  }
  50% {
    transform: translateX(-45%) translateY(20px) scale(1.1);
    opacity: 1;
  }
  100% {
    transform: translateX(-55%) translateY(-10px) scale(0.95);
    opacity: 0.8;
  }
}

/* 2. Scroll Reveal Animations */
.reveal-init {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-init.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.revealed {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays for grid items */
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* 3. Card Hover Shine & Elevation */
.card-interactive {
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.card-interactive::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    60deg,
    transparent 30%,
    rgba(255, 255, 255, 0.04) 45%,
    rgba(255, 255, 255, 0.08) 50%,
    transparent 55%
  );
  transform: rotate(-25deg) translateY(-100%);
  transition: transform 0.75s cubic-bezier(0.19, 1, 0.22, 1);
  pointer-events: none;
}

.card-interactive:hover::after {
  transform: rotate(-25deg) translateY(100%);
}

.card-interactive:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.4), 0 0 20px rgba(59, 130, 246, 0.15);
  border-color: var(--border-focus);
}

/* 4. Calculator & Button Micro-Interactions */
.calc-btn {
  transition: transform 0.1s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  position: relative;
  overflow: hidden;
}

.calc-btn:active {
  transform: scale(0.93) translateY(2px);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.btn {
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.btn:active {
  transform: scale(0.97) translateY(1px);
}

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

@keyframes rippleAnimation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* 5. Live Conversion Result Value Flash */
.value-updated {
  animation: resultFlash 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes resultFlash {
  0% {
    transform: scale(1.02);
    filter: drop-shadow(0 0 8px var(--accent-primary-glow));
    color: var(--accent-cyan);
  }
  100% {
    transform: scale(1);
    filter: drop-shadow(0 0 0 transparent);
  }
}

/* 6. Swap Button 360 Rotation */
.swap-spinning {
  animation: spinSwap 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes spinSwap {
  0% { transform: rotate(0deg) scale(0.85); }
  50% { transform: rotate(180deg) scale(1.15); }
  100% { transform: rotate(360deg) scale(1); }
}

/* 7. Animated Floating Badges */
.hero-badge, .card-badge.live {
  animation: badgeBreathe 3s ease-in-out infinite alternate;
}

@keyframes badgeBreathe {
  0% {
    box-shadow: 0 0 0 rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.3);
  }
}

/* 10. Zuloo AI-Style Interactive Cursor Spotlight & Glowing Mesh */
.spotlight-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
}

.spotlight-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    550px circle at var(--mouse-x, -500px) var(--mouse-y, -500px),
    rgba(59, 130, 246, 0.14),
    rgba(16, 185, 129, 0.05) 30%,
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 1;
}

.spotlight-card:hover::before {
  opacity: 1;
}

/* 11. Hero Tech Grid Pattern Background */
.hero {
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: 36px 36px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  mask-image: radial-gradient(ellipse 65% 55% at 50% 20%, #000 60%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 65% 55% at 50% 20%, #000 60%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

/* 12. Live Radar Pulse Beacon */
.radar-beacon {
  position: relative;
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--accent-primary);
  border-radius: 50%;
}

.radar-beacon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: var(--accent-primary);
  animation: radarPing 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes radarPing {
  75%, 100% {
    transform: scale(2.6);
    opacity: 0;
  }
}

/* 13. Smooth 3D Card Perspective */
@media (min-width: 992px) {
  .tilt-card {
    transform-style: preserve-3d;
    perspective: 1000px;
    transition: transform 0.15s cubic-bezier(0.2, 0, 0.2, 1);
  }
}

/* 14. Ambient Global Cursor Follower Background Glow */
.global-cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(59, 130, 246, 0.22) 0%,
    rgba(16, 185, 129, 0.12) 35%,
    rgba(6, 182, 212, 0.04) 55%,
    transparent 70%
  );
  filter: blur(40px);
  pointer-events: none;
  z-index: 99990;
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity 0.3s ease, width 0.3s ease, height 0.3s ease;
  will-change: transform, opacity;
  transform: translate(-50%, -50%);
}

[data-theme="light"] .global-cursor-glow {
  background: radial-gradient(
    circle,
    rgba(5, 150, 105, 0.14) 0%,
    rgba(37, 99, 235, 0.08) 35%,
    transparent 70%
  );
  mix-blend-mode: normal;
}

/* 15. Smooth Interactive Cursor Ring */
.global-cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  width: 32px;
  height: 32px;
  border: 1.5px solid rgba(59, 130, 246, 0.65);
  border-radius: 50%;
  pointer-events: none;
  z-index: 99995;
  opacity: 0;
  transform: translate(-50%, -50%);
  transition: width 0.2s cubic-bezier(0.16, 1, 0.3, 1), height 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s ease, background-color 0.2s ease, opacity 0.3s ease;
  will-change: transform;
}

.global-cursor-ring.hovering {
  width: 48px;
  height: 48px;
  border-color: var(--accent-primary);
  background: rgba(16, 185, 129, 0.12);
  box-shadow: 0 0 12px var(--accent-primary-glow);
}