/* ==========================================================================
   Quizzar Go - Clean Sans-Serif Design
   ========================================================================== */

/* 1. Self-Hosted Typography (Inter Only) */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/assets/fonts/inter.woff2') format('woff2');
}

/* 2. Custom Properties (Theme Colors & Spacing) */
:root {
  --color-bg: #F9F7F5;
  --color-surface: #FFFFFF;
  --color-text: #241F1B;
  --color-text-muted: #6E655C;
  --color-border: #E6E0D8;
  --color-accent: #B85C38;
  --color-accent-hover: #A34F2F;
  --color-accent-soft: rgba(184, 92, 56, 0.15);
  --color-gold: #BE9433;
  --color-streak: #C86829;
  --color-btn-text: #FFFFFF;

  --space-8: 8px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --space-48: 48px;
  --space-64: 64px;
  --space-96: 96px;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

html[data-theme="dark"] {
  --color-bg: #12100E;
  --color-surface: #1C1916;
  --color-text: #F2ECE4;
  --color-text-muted: #B5ABA0;
  --color-border: #2E2925;
  --color-accent: #D96B43;
  --color-accent-hover: #E07B54;
  --color-accent-soft: rgba(217, 107, 67, 0.18);
  --color-btn-text: #12100E;
}

/* 3. Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@media (min-width: 768px) {
  body {
    font-size: 20px;
  }
}

main {
  flex: 1 0 auto;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-rendering: optimizeLegibility;
}

h1 {
  font-size: clamp(30px, 4.5vw, 48px);
}

h2 {
  font-size: clamp(24px, 3.2vw, 32px);
  margin-bottom: var(--space-24);
}

h3 {
  font-size: 20px;
  margin-top: var(--space-32);
  margin-bottom: var(--space-16);
}

p {
  margin-bottom: var(--space-24);
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 150ms ease;
}

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* 4. Reading Column */
.reading-column {
  max-width: 680px;
  margin-inline: auto;
  padding-inline: var(--space-24);
}

/* 5. Section Divider */
.section-divider {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-64) auto;
  max-width: 680px;
}

@media (min-width: 768px) {
  .section-divider {
    margin: var(--space-96) auto;
  }
}

/* 6. Sticky Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--color-surface) 85%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
}

.header-inner {
  max-width: 1024px;
  margin-inline: auto;
  padding-inline: var(--space-24);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.header-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 16px;
}

.app-icon-img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: block;
}

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

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-16);
}

/* Desktop Nav (>= 768px) */
.desktop-nav {
  display: none;
}

@media (min-width: 768px) {
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: var(--space-24);
  }
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-8) 0;
}

.nav-link:hover {
  color: var(--color-text);
}

/* Theme Toggle Button */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  cursor: pointer;
}

.theme-toggle:hover {
  background-color: color-mix(in srgb, var(--color-surface) 50%, transparent);
}

.theme-icon {
  width: 20px;
  height: 20px;
  display: block;
}

.icon-sun {
  display: none;
}

.icon-moon {
  display: block;
}

html[data-theme="dark"] .icon-sun {
  display: block;
}

html[data-theme="dark"] .icon-moon {
  display: none;
}

/* Header Download CTA */
.header-cta {
  display: none;
}

@media (min-width: 768px) {
  .header-cta {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    line-height: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  @media (prefers-reduced-motion: no-preference) {
    .header-cta {
      transition: opacity 200ms ease, visibility 200ms ease;
    }
  }

  .site-header.header--show-cta .header-cta {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .header-badge-img {
    height: 38px;
    width: auto;
    display: block;
  }
}

/* Mobile Nav (< 768px) */
.mobile-nav {
  position: relative;
  display: block;
}

@media (min-width: 768px) {
  .mobile-nav {
    display: none;
  }
}

.menu-summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.menu-summary::-webkit-details-marker {
  display: none;
}

.menu-icon {
  width: 22px;
  height: 22px;
}

.mobile-panel {
  position: absolute;
  top: calc(100% + 10px);
  right: calc(-1 * var(--space-24));
  width: 100vw;
  background-color: color-mix(in srgb, var(--color-surface) 92%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--color-border) 40%, transparent);
}

.mobile-links {
  display: flex;
  flex-direction: column;
}

.mobile-link {
  height: 56px;
  display: flex;
  align-items: center;
  padding-inline: var(--space-24);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-top: 1px solid var(--color-border);
}

.mobile-link:hover {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
}

/* 7. Text-Only Hero */
.editorial-hero {
  padding-top: var(--space-64);
  padding-bottom: var(--space-32);
}

@media (min-width: 768px) {
  .editorial-hero {
    padding-top: var(--space-96);
    padding-bottom: var(--space-48);
  }
}

.hero-headline {
  margin-bottom: var(--space-24);
}

.hero-support {
  font-size: clamp(20px, 2.2vw, 24px);
  line-height: 1.5;
  color: var(--color-text-muted);
  margin-bottom: var(--space-48);
}

/* 8. Google Play Badge */
.play-badge-link {
  display: inline-block;
  line-height: 0;
  text-decoration: none;
  border-radius: 8px;
  transition: opacity 150ms ease;
}

.play-badge-link:hover {
  opacity: 0.9;
}

.play-badge-img {
  height: 60px;
  width: auto;
  max-width: 100%;
  display: block;
}

@media (min-width: 768px) {
  .play-badge-img {
    height: 84px;
  }
}

/* 9. Editorial Content Sections */
.editorial-section {
  padding-block: var(--space-16);
}

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

/* Closing Call to Action */
.closing-cta {
  padding-top: var(--space-16);
  padding-bottom: var(--space-64);
}

@media (min-width: 768px) {
  .closing-cta {
    padding-bottom: var(--space-96);
  }
}

.closing-actions {
  margin-top: var(--space-32);
}

/* 10. Legal Pages Layout */
.legal-page {
  padding-top: var(--space-48);
  padding-bottom: var(--space-96);
}

.legal-container {
  max-width: 680px;
  margin-inline: auto;
  padding-inline: var(--space-24);
}

@media (min-width: 1024px) {
  .legal-container {
    max-width: 1024px;
    display: grid;
    grid-template-columns: 240px 680px;
    gap: var(--space-48);
    align-items: start;
    padding-inline: var(--space-24);
  }
}

/* Sticky Table of Contents */
.legal-toc-wrapper {
  margin-bottom: var(--space-32);
}

.toc-details {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-16);
  background-color: var(--color-surface);
}

.toc-summary {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--space-8);
}

.toc-nav {
  margin-top: var(--space-16);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  padding-left: var(--space-16);
}

.toc-link {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  display: block;
  padding: var(--space-8);
  border-radius: 4px;
}

.toc-link:hover {
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
}

@media (min-width: 1024px) {
  .legal-toc-wrapper {
    position: sticky;
    top: 96px;
    margin-bottom: 0;
  }

  .toc-details {
    border: none;
    padding: 0;
    background: transparent;
  }

  .toc-summary {
    display: block;
    list-style: none;
    cursor: default;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: var(--space-16);
  }

  .toc-summary::-webkit-details-marker {
    display: none;
  }

  .toc-nav {
    margin-top: 0;
  }
}

/* Legal Article Body */
.legal-article {
  max-width: 680px;
}

.legal-header {
  margin-bottom: var(--space-48);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-24);
}

.legal-title {
  margin-bottom: var(--space-16);
}

.last-updated {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.legal-body {
  font-size: 15px;
  line-height: 1.6;
  overflow-wrap: break-word;
}

@media (min-width: 768px) {
  .legal-body {
    font-size: 16px;
  }
}

.legal-body h2 {
  font-size: 24px;
  margin-top: var(--space-48);
  margin-bottom: var(--space-16);
  scroll-margin-top: 80px;
}

.legal-body h3 {
  font-size: 20px;
  margin-top: var(--space-32);
  margin-bottom: var(--space-16);
  scroll-margin-top: 80px;
}

.legal-body ul, .legal-body ol {
  margin-bottom: var(--space-24);
  padding-left: var(--space-32);
}

.legal-body li {
  margin-bottom: var(--space-8);
}

/* Legal Callouts & Tables */
.callout {
  border-left: 3px solid var(--color-accent);
  padding: var(--space-16) var(--space-24);
  background-color: var(--color-surface);
  margin-block: var(--space-24);
  font-size: 15px;
  border-radius: 0 4px 4px 0;
}

.table-container {
  overflow-x: auto;
  margin-block: var(--space-32);
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 14px;
}

th, td {
  padding: var(--space-16);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 700;
  color: var(--color-text);
  background-color: var(--color-surface);
}

td {
  color: var(--color-text);
}

tr:last-child td {
  border-bottom: none;
}

/* 11. 404 Page Box */
.notfound-container {
  max-width: 680px;
  margin-inline: auto;
  padding: var(--space-96) var(--space-24);
  text-align: center;
}

.notfound-title {
  font-size: clamp(36px, 6vw, 64px);
  margin-bottom: var(--space-24);
}

.notfound-action {
  margin-top: var(--space-32);
}

.btn-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  background-color: var(--color-accent);
  color: var(--color-btn-text);
  min-height: 44px;
  padding: var(--space-8) var(--space-24);
  border-radius: 8px;
  transition: background-color 150ms ease;
}

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

/* 12. Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-32);
  background-color: var(--color-bg);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
}

.footer-inner {
  max-width: 1024px;
  margin-inline: auto;
  padding-inline: var(--space-24);
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  font-weight: 700;
  color: var(--color-text);
}

.footer-icon {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  display: block;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-16) var(--space-24);
}

.footer-link {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer-copy {
  color: var(--color-text-muted);
}