/* ============================================
   Sleepify Design System — Shared Styles
   A calming, night-themed design for legal pages
   ============================================ */

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

:root {
  /* Primary palette */
  --color-bg: #0B0E1A;
  --color-bg-elevated: #111528;
  --color-bg-card: #161A2E;
  --color-bg-hover: #1C2140;

  /* Accent */
  --color-accent: #7C6AF0;
  --color-accent-light: #A99BF5;
  --color-accent-glow: rgba(124, 106, 240, 0.15);

  /* Text */
  --color-text-primary: #E8E6F0;
  --color-text-secondary: #9B97B0;
  --color-text-muted: #6B6780;
  --color-text-heading: #FFFFFF;

  /* Borders */
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-accent: rgba(124, 106, 240, 0.25);

  /* Gradients */
  --gradient-header: linear-gradient(135deg, #1A1040 0%, #0B0E1A 50%, #0D1225 100%);
  --gradient-accent: linear-gradient(135deg, #7C6AF0, #5B4AC7);
  --gradient-subtle: linear-gradient(180deg, rgba(124, 106, 240, 0.06) 0%, transparent 100%);
  --gradient-glow: radial-gradient(ellipse at 50% 0%, rgba(124, 106, 240, 0.12) 0%, transparent 60%);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(124, 106, 240, 0.1);

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Menlo', monospace;

  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 22px;
  --text-2xl: 28px;
  --text-3xl: 36px;

  --leading-tight: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;

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

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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(--color-bg);
  color: var(--color-text-primary);
  line-height: var(--leading-normal);
  min-height: 100vh;
}

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

a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

/* --- Page Header --- */
.page-header {
  background: var(--gradient-header);
  position: relative;
  overflow: hidden;
  padding: var(--space-4xl) var(--space-lg) var(--space-3xl);
  text-align: center;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-glow);
  pointer-events: none;
}

.page-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-accent), transparent);
}

.header-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-accent-light);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
}

.header-brand .brand-icon {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.header-brand .brand-icon svg {
  width: 100%;
  height: 100%;
}

.page-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
  position: relative;
}

.page-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* --- Main Content Container --- */
.content-container {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-lg) var(--space-4xl);
}

/* --- Meta Info Bar --- */
.meta-info {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2xl);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

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

.meta-info .meta-label {
  color: var(--color-text-muted);
}

/* --- Section Styles --- */
.section {
  margin-bottom: var(--space-2xl);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: -0.01em;
}

.section-title .section-number {
  color: var(--color-accent);
  margin-right: var(--space-sm);
  font-weight: 700;
}

.subsection-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

/* --- Paragraph & List Styles --- */
p {
  margin-bottom: var(--space-md);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
}

ul, ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

li {
  margin-bottom: var(--space-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
}

li::marker {
  color: var(--color-accent);
}

/* --- Highlight Box --- */
.highlight-box {
  background: var(--color-accent-glow);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
  margin-bottom: var(--space-lg);
}

.highlight-box p {
  color: var(--color-text-primary);
  margin-bottom: 0;
}

.highlight-box strong {
  color: var(--color-accent-light);
}

/* --- Info Card --- */
.info-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  transition: border-color var(--transition-smooth);
}

.info-card:hover {
  border-color: var(--color-border-accent);
}

.info-card .card-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: var(--space-sm);
}

.info-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* --- Table --- */
.styled-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-lg);
  font-size: var(--text-sm);
}

.styled-table th,
.styled-table td {
  text-align: left;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.styled-table th {
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.styled-table td {
  color: var(--color-text-primary);
}

.styled-table tr:hover td {
  background: var(--color-bg-hover);
}

/* --- FAQ Accordion --- */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  overflow: hidden;
  transition: border-color var(--transition-smooth);
}

.faq-item:hover {
  border-color: var(--color-border-accent);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  background: var(--color-bg-card);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
  gap: var(--space-md);
}

.faq-question:hover {
  background: var(--color-bg-hover);
}

.faq-question h3 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-heading);
  flex: 1;
}

.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-accent);
  transition: transform var(--transition-smooth);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 600px;
}

.faq-answer-inner {
  padding: 0 var(--space-xl) var(--space-xl);
}

.faq-answer-inner p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* --- Category Tabs (FAQ) --- */
.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.category-tab {
  padding: var(--space-sm) var(--space-md);
  border-radius: 999px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.category-tab:hover,
.category-tab.active {
  color: var(--color-text-heading);
  background: var(--color-accent-glow);
  border-color: var(--color-border-accent);
}

/* --- Footer --- */
.page-footer {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.footer-brand {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: var(--space-sm);
}

.footer-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent-light);
  text-decoration: none;
}

.footer-copyright {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* --- Navigation Links --- */
.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
}

.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-xs) var(--space-md);
  border-radius: 999px;
  transition: all var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text-heading);
  background: var(--color-accent-glow);
  text-decoration: none;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-md);
  border: none;
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-light);
  box-shadow: var(--shadow-glow);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .page-header {
    padding: var(--space-3xl) var(--space-md) var(--space-2xl);
  }

  .page-title {
    font-size: var(--text-2xl);
  }

  .content-container {
    padding: var(--space-xl) var(--space-md) var(--space-3xl);
  }

  .meta-info {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .nav-links {
    gap: var(--space-xs);
  }

  .footer-links {
    flex-direction: column;
    align-items: center;
  }
}

/* --- Scrollbar Styling --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-hover);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* --- Print Styles --- */
@media print {
  body {
    background: white;
    color: #1a1a1a;
  }

  .page-header {
    background: none;
    padding: 20px 0;
  }

  .page-title {
    color: #1a1a1a;
  }

  .nav-links,
  .back-to-top {
    display: none;
  }

  .content-container {
    max-width: 100%;
  }
}