/* ==========================================================================
   Systematic Finance / Expense Manager - Design System & Stylesheet
   ========================================================================== */

:root {
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Color Palette - Premium Dark Mode (Default) */
  --bg-primary: #070B14;
  --bg-secondary: #0D1527;
  --bg-card: rgba(18, 28, 49, 0.75);
  --bg-card-hover: rgba(24, 38, 66, 0.85);
  --bg-glass: rgba(13, 21, 39, 0.8);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(16, 185, 129, 0.3);

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --accent-emerald: #10B981;
  --accent-emerald-light: #34D399;
  --accent-emerald-glow: rgba(16, 185, 129, 0.2);
  --accent-blue: #3B82F6;
  --accent-cyan: #06B6D4;
  --accent-amber: #F59E0B;
  --accent-rose: #F43F5E;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 25px rgba(16, 185, 129, 0.18);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #EEF2F6;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #FFFFFF;
  --bg-glass: rgba(255, 255, 255, 0.85);
  
  --border-color: rgba(148, 163, 184, 0.2);
  --border-highlight: rgba(16, 185, 129, 0.4);

  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 20px rgba(16, 185, 129, 0.15);
}

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

html {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% -20%, rgba(16, 185, 129, 0.12), transparent 50%),
              radial-gradient(circle at 100% 40%, rgba(59, 130, 246, 0.08), transparent 40%),
              var(--bg-primary);
}

/* Background Gradients & Glow */
.ambient-glow {
  position: fixed;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.05) 50%, transparent 75%);
  pointer-events: none;
  z-index: 0;
  filter: blur(60px);
}

/* Container */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header & Navigation */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

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

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  flex-direction: column;
}

.brand-name small {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent-emerald);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

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

.nav-link.active {
  color: var(--accent-emerald);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-highlight);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
}

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

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

.btn-danger {
  background: linear-gradient(135deg, #F43F5E 0%, #E11D48 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(244, 63, 94, 0.35);
}

.btn-danger:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(244, 63, 94, 0.45);
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-compliant {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald-light);
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.badge-info {
  background: rgba(59, 130, 246, 0.15);
  color: #60A5FA;
  border: 1px solid rgba(59, 130, 246, 0.35);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #FBBF24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

/* Page Hero */
.page-hero {
  padding: 48px 0 32px;
  text-align: left;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-emerald) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin-bottom: 24px;
}

.app-identifiers-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.id-item {
  display: flex;
  flex-direction: column;
}

.id-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 4px;
}

.id-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.id-value code {
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--accent-emerald-light);
}

/* Quick Nav / Table of Contents */
.toc-bar {
  position: sticky;
  top: 72px;
  z-index: 90;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
  margin-bottom: 36px;
}

.toc-links {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  white-space: nowrap;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.toc-links::-webkit-scrollbar {
  height: 4px;
}

.toc-links::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}

.toc-item {
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.toc-item:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
}

/* Content Article */
.legal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 48px);
  box-shadow: var(--shadow-md);
  margin-bottom: 48px;
}

.legal-section {
  margin-bottom: 40px;
  scroll-margin-top: 140px;
}

.legal-section:last-child {
  margin-bottom: 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.section-number {
  font-size: 0.85rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  padding: 2px 8px;
  border-radius: 6px;
  font-weight: 700;
}

.legal-section h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 20px 0 10px;
  color: var(--text-primary);
}

.legal-section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.legal-section ul, .legal-section ol {
  color: var(--text-secondary);
  padding-left: 24px;
  margin-bottom: 16px;
}

.legal-section li {
  margin-bottom: 8px;
}

.legal-section strong {
  color: var(--text-primary);
}

/* Callout Boxes */
.callout {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin: 20px 0;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-size: 0.95rem;
}

.callout-icon {
  font-size: 1.25rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.callout-body {
  flex: 1;
  color: var(--text-secondary);
}

.callout-body strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 4px;
}

.callout-success {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-left: 4px solid var(--accent-emerald);
}

.callout-info {
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-left: 4px solid var(--accent-blue);
}

.callout-warning {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-left: 4px solid var(--accent-amber);
}

.callout-danger {
  background: rgba(244, 63, 94, 0.08);
  border: 1px solid rgba(244, 63, 94, 0.25);
  border-left: 4px solid var(--accent-rose);
}

/* Data Safety Matrix (Google Play Store Tables) */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin: 20px 0;
  box-shadow: var(--shadow-sm);
}

table.compliance-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

table.compliance-table th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  font-weight: 600;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

table.compliance-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  vertical-align: top;
}

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

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

.status-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

.status-yes {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald-light);
}

.status-no {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-muted);
}

.status-opt {
  background: rgba(59, 130, 246, 0.2);
  color: #93C5FD;
}

/* Interactive Forms (e.g. Account Deletion Request) */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 24px 0;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-emerald);
  box-shadow: 0 0 0 3px var(--accent-emerald-glow);
}

textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

.form-help {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Accordion Component */
.accordion {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 20px 0;
}

.accordion-item {
  border-bottom: 1px solid var(--border-color);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  padding: 16px 20px;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: rgba(255, 255, 255, 0.03);
}

.accordion-icon {
  font-size: 0.8rem;
  transition: transform var(--transition-normal);
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  padding: 16px 20px;
  background: rgba(0, 0, 0, 0.1);
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid var(--border-color);
}

.accordion-item.open .accordion-content {
  display: block;
}

/* Feature Grid for Landing Page */
.grid-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 40px 0;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition-normal);
}

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

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.feature-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Footer */
footer.site-footer {
  margin-top: auto;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(auto-fit, minmax(160px, 1fr));
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand p {
  margin-top: 12px;
  max-width: 320px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-col h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 0.82rem;
  color: var(--text-muted);
  gap: 12px;
}

.footer-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Responsive Navigation Toggle */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 6px;
}

@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 16px 24px;
    gap: 8px;
  }

  .nav-links.open {
    display: flex;
  }

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

  .hero-title {
    font-size: 2rem;
  }
}

/* Print Optimization for Audits & PDF Export */
@media print {
  body {
    background: #FFFFFF !important;
    color: #000000 !important;
  }

  header.site-header, .toc-bar, .btn-theme-toggle, footer.site-footer, .ambient-glow {
    display: none !important;
  }

  .container {
    max-width: 100% !important;
    padding: 0 !important;
  }

  .legal-content {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }

  .section-title {
    color: #000000 !important;
    border-bottom: 1px solid #CCCCCC !important;
  }

  .legal-section p, .legal-section li, .callout-body {
    color: #333333 !important;
  }

  table.compliance-table th, table.compliance-table td {
    border: 1px solid #DDDDDD !important;
    color: #000000 !important;
  }
}