/* ==========================================================================
   MONEYMETRIC FINTECH DESIGN SYSTEM
   Color System:
   Primary: Midnight Navy #14213D
   Secondary: Emerald #14866D
   Accent: Soft Gold #E4B75A
   Background: #F5F7FA
   Card: #FFFFFF
   Text: #182130
   Muted: #657080
   Dark Background: #0D1321
   Dark Card: #151F32
   ========================================================================== */

:root {
  /* Brand Colors */
  --color-primary: #14213D;
  --color-primary-light: #1e315b;
  --color-primary-dark: #0b1324;
  --color-secondary: #14866D;
  --color-secondary-light: #1da889;
  --color-secondary-dark: #0e614e;
  --color-secondary-soft: rgba(20, 134, 109, 0.12);
  --color-accent: #E4B75A;
  --color-accent-light: #f1cf85;
  --color-accent-soft: rgba(228, 183, 90, 0.15);

  /* Status Colors */
  --color-positive: #10B981;
  --color-positive-soft: rgba(16, 185, 129, 0.12);
  --color-negative: #EF4444;
  --color-negative-soft: rgba(239, 68, 68, 0.12);
  --color-info: #3B82F6;
  --color-info-soft: rgba(59, 130, 246, 0.12);
  --color-warning: #F59E0B;

  /* Theme: Light (Default) */
  --bg-app: #F5F7FA;
  --bg-card: #FFFFFF;
  --bg-card-secondary: #F8FAFC;
  --bg-surface: #EEF2F6;
  --bg-input: #FFFFFF;
  --border-color: #E2E8F0;
  --border-color-focus: #14866D;
  --text-primary: #182130;
  --text-secondary: #4A5568;
  --text-muted: #657080;
  --text-inverse: #FFFFFF;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(20, 33, 61, 0.04);
  --shadow-sm: 0 2px 4px rgba(20, 33, 61, 0.06);
  --shadow-md: 0 6px 16px rgba(20, 33, 61, 0.08);
  --shadow-lg: 0 12px 32px rgba(20, 33, 61, 0.12);
  --shadow-xl: 0 20px 48px rgba(20, 33, 61, 0.16);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, monospace;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

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

  --max-width: 1280px;
  --header-height: 72px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-app: #0D1321;
  --bg-card: #151F32;
  --bg-card-secondary: #1C283E;
  --bg-surface: #1E2D47;
  --bg-input: #111A2B;
  --border-color: #243552;
  --border-color-focus: #1da889;
  --text-primary: #F3F6FA;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-inverse: #0D1321;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.6);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11", "tnum";
}

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

h1 { font-size: 2.25rem; font-weight: 800; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }

p {
  color: var(--text-secondary);
  font-size: 1rem;
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-secondary-light);
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  background-color: rgba(255, 255, 255, 0.95);
  transition: var(--transition);
}

[data-theme="dark"] .header {
  background-color: rgba(21, 31, 50, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

[data-theme="dark"] .brand-logo {
  color: #FFFFFF;
}

.brand-symbol {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(20, 134, 109, 0.25);
}

.brand-symbol svg {
  width: 22px;
  height: 22px;
  stroke-width: 2.2;
}

.brand-text span {
  color: var(--color-secondary);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.5rem 0.85rem;
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  background-color: var(--bg-surface);
}

[data-theme="dark"] .nav-link:hover, [data-theme="dark"] .nav-link.active {
  color: #FFFFFF;
  background-color: var(--bg-surface);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Quick Search Trigger in Header */
.search-trigger-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.search-trigger-btn:hover {
  border-color: var(--color-secondary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.search-trigger-btn kbd {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.15rem 0.4rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* Currency & Theme Toggles */
.icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.icon-btn:hover {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.currency-select-wrapper {
  position: relative;
}

.currency-select {
  appearance: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.45rem 1.75rem 0.45rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: var(--transition);
}

.currency-select:hover, .currency-select:focus {
  border-color: var(--color-secondary);
  outline: none;
}

.currency-select-wrapper::after {
  content: "▾";
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
}

/* Mobile Menu Button */
.mobile-menu-toggle {
  display: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.935rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(20, 33, 61, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(20, 134, 109, 0.25);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-light);
  color: #FFFFFF;
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background-color: var(--bg-surface);
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #14213D;
  font-weight: 700;
}

.btn-accent:hover {
  background-color: var(--color-accent-light);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-pill);
}

.badge-emerald {
  background-color: var(--color-secondary-soft);
  color: var(--color-secondary);
}

.badge-gold {
  background-color: var(--color-accent-soft);
  color: #B48425;
}

[data-theme="dark"] .badge-gold {
  color: var(--color-accent);
}

.badge-navy {
  background-color: rgba(20, 33, 61, 0.1);
  color: var(--color-primary);
}

[data-theme="dark"] .badge-navy {
  background-color: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

.badge-positive {
  background-color: var(--color-positive-soft);
  color: var(--color-positive);
}

.badge-negative {
  background-color: var(--color-negative-soft);
  color: var(--color-negative);
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  border-color: var(--color-secondary);
  transform: translateY(-2px);
}

/* Hero Section */
.hero-section {
  padding: 4.5rem 0 3rem 0;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-app) 100%);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(20, 134, 109, 0.08) 0%, rgba(20, 134, 109, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-section::after {
  content: "";
  position: absolute;
  bottom: -150px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(228, 183, 90, 0.06) 0%, rgba(228, 183, 90, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.35rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-secondary);
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-xs);
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-primary);
  letter-spacing: -0.035em;
  margin-bottom: 1.25rem;
  line-height: 1.15;
}

[data-theme="dark"] .hero-title {
  color: #FFFFFF;
}

.hero-title span {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Search Bar */
.hero-search-box {
  max-width: 620px;
  margin: 0 auto 1.5rem auto;
  position: relative;
}

.hero-search-input {
  width: 100%;
  padding: 1.1rem 3.5rem 1.1rem 3.25rem;
  font-size: 1.05rem;
  border-radius: var(--radius-pill);
  border: 2px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  font-family: inherit;
  transition: var(--transition);
}

.hero-search-input:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 4px var(--color-secondary-soft), var(--shadow-lg);
}

.hero-search-icon {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.hero-search-shortcut {
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Quick Category Pills */
.hero-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.hero-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition);
}

.hero-pill:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  background-color: var(--bg-surface);
}

/* Section Common */
.section {
  padding: 4rem 0;
}

.section-header {
  margin-bottom: 2.25rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.section-header-content {
  max-width: 680px;
}

.section-tag {
  color: var(--color-secondary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

[data-theme="dark"] .section-title {
  color: #FFFFFF;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 0.35rem;
}

/* Grid Layouts */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

/* Category Navigation Cards */
.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  transition: var(--transition);
  text-decoration: none;
}

.category-card:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-secondary-soft);
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
}

.category-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.category-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.category-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
}

/* Calculator Grid Card */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  transition: var(--transition);
  text-decoration: none;
  position: relative;
}

.calc-card:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.calc-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.calc-card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

[data-theme="dark"] .calc-card-icon {
  color: #FFFFFF;
}

.calc-card-fav-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: var(--transition);
}

.calc-card-fav-btn:hover, .calc-card-fav-btn.active {
  color: var(--color-accent);
}

.calc-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.calc-card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.calc-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
}

.calc-card-tag {
  color: var(--color-secondary);
  background: var(--color-secondary-soft);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

/* Footer */
.footer {
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: 4.5rem 0 2.5rem 0;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: #A0AEC0;
  margin-top: 1rem;
  font-size: 0.9rem;
  max-width: 320px;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

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

.footer-links a {
  color: #A0AEC0;
  font-size: 0.875rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-disclaimer-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 2rem;
}

.footer-disclaimer-box h5 {
  color: var(--color-accent);
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.footer-disclaimer-box p {
  color: #CBD5E0;
  font-size: 0.8rem;
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  font-size: 0.85rem;
  color: #A0AEC0;
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.15rem; }
  .nav-desktop { display: none; }
  .mobile-menu-toggle { display: flex; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
  .section-header { flex-direction: column; align-items: flex-start; }
}