/* ==========================================================================
   AbroadOdds — Main Stylesheet
   Dark theme, mobile-first, no external dependencies
   ========================================================================== */

/* ── 1. CSS VARIABLES ─────────────────────────────────────────────────────── */

:root {
  --color-bg:           #0d1117;
  --color-surface:      #161b22;
  --color-border:       #30363d;
  --color-primary:      #238636;
  --color-primary-hover:#2ea043;
  --color-text:         #e6edf3;
  --color-text-muted:   #8b949e;
  --color-heading:      #f0f6fc;
  --color-link:         #58a6ff;
  --color-link-hover:   #79c0ff;
  --color-warning:      #d29922;
  --color-danger:       #da3633;

  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'Fira Code', monospace;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;

  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;

  --max-content: 860px;
  --max-site:   1200px;
}

/* ── 2. RESET & BASE ──────────────────────────────────────────────────────── */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── 3. TYPOGRAPHY ────────────────────────────────────────────────────────── */

h1, h2, h3, h4, h5, h6 {
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.3;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); margin-top: 0; }
h2 { font-size: clamp(1.3rem, 3vw, 1.75rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }

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

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

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

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: var(--space-md);
}

li {
  margin-bottom: var(--space-xs);
}

strong {
  font-weight: 600;
  color: var(--color-heading);
}

em {
  font-style: italic;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-xl) 0;
}

/* ── 4. LAYOUT & CONTAINERS ──────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--narrow {
  max-width: var(--max-content);
}

.layout-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

@media (min-width: 1024px) {
  .layout-content {
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: start;
  }
}

/* ── 5. NAVIGATION ────────────────────────────────────────────────────────── */

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: var(--space-md);
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img,
.site-logo svg {
  height: 36px;
  width: auto;
}

.site-logo:hover {
  opacity: 0.85;
}

/* Main nav */
.main-nav {
  display: none;
}

.main-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: var(--space-xs);
  align-items: center;
}

.main-nav a {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background-color 0.15s;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-text);
  background-color: rgba(255,255,255,0.06);
}

/* Hamburger button */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav menu */
.mobile-nav {
  display: none;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mobile-nav a {
  display: block;
  padding: 0.6rem var(--space-md);
  color: var(--color-text);
  text-decoration: none;
  font-size: 1rem;
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.1s;
}

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

.mobile-nav li:last-child a {
  border-bottom: none;
}

@media (min-width: 768px) {
  .main-nav {
    display: flex;
  }
  .nav-toggle {
    display: none;
  }
  .mobile-nav {
    display: none !important;
  }
}

/* ── 6. HERO ─────────────────────────────────────────────────────────────── */

.hero {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-xl) 0;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.hero h1 {
  margin: 0;
}

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

.hero-image {
  display: none;
}

.hero--article {
  padding: var(--space-lg) 0;
}

@media (min-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr auto;
  }
  .hero-image {
    display: block;
  }
  .hero-image img {
    width: 300px;
    height: auto;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: var(--space-2xl) 0;
  }
  .hero-image img {
    width: 380px;
  }
}

/* ── 7. BREADCRUMB ────────────────────────────────────────────────────────── */

.breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.breadcrumb li::after {
  content: '/';
  margin-left: var(--space-xs);
  color: var(--color-border);
}

.breadcrumb li:last-child::after {
  display: none;
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-link);
  text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-text);
}

/* ── 8. ARTICLE CONTENT ──────────────────────────────────────────────────── */

.article-content {
  min-width: 0;
}

.article-content h2 {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-sm);
}

/* ── 9. TABLE OF CONTENTS ────────────────────────────────────────────────── */

.toc {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
}

.toc h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
}

.toc ol {
  padding-left: 1.2rem;
  margin: 0;
}

.toc li {
  margin-bottom: var(--space-xs);
}

.toc a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
}

.toc a:hover {
  color: var(--color-link);
  text-decoration: underline;
}

/* ── 10. CALLOUTS & BOXES ────────────────────────────────────────────────── */

.callout {
  background-color: rgba(35, 134, 54, 0.1);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  font-size: 0.95rem;
}

.callout strong {
  color: var(--color-primary);
}

.callout--warning {
  background-color: rgba(210, 153, 34, 0.1);
  border-left-color: var(--color-warning);
}

.callout--warning strong {
  color: var(--color-warning);
}

.callout--danger {
  background-color: rgba(218, 54, 51, 0.1);
  border-left-color: var(--color-danger);
}

.checklist-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
}

.checklist-box h3 {
  font-size: 1rem;
  margin-top: 0;
  margin-bottom: var(--space-sm);
}

.checklist-box ul {
  margin: 0;
}

.checklist-box li::marker {
  color: var(--color-primary);
}

.example-box {
  background-color: rgba(88, 166, 255, 0.07);
  border: 1px solid rgba(88, 166, 255, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  font-size: 0.95rem;
}

.example-box strong {
  color: var(--color-link);
}

/* ── 11. TABLES ──────────────────────────────────────────────────────────── */

.table-wrapper {
  overflow-x: auto;
  margin: var(--space-lg) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead {
  background-color: var(--color-surface);
}

th {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-weight: 600;
  color: var(--color-heading);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

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

tbody tr:hover {
  background-color: rgba(255,255,255,0.03);
}

/* ── 12. FAQ ─────────────────────────────────────────────────────────────── */

.faq {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
}

.faq-item h3 {
  font-size: 1rem;
  margin: 0 0 var(--space-sm);
  color: var(--color-heading);
}

.faq-item p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text);
}

/* ── 13. PARTNERS LIST ───────────────────────────────────────────────────── */

.partners-list {
  margin: var(--space-xl) 0;
}

.partners-list h2 {
  font-size: 1.3rem;
  margin-bottom: var(--space-md);
  border-bottom: none;
}

.partner-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-sm);
  transition: border-color 0.15s, background-color 0.15s;
}

.partner-card:hover {
  border-color: var(--color-primary);
  background-color: rgba(35, 134, 54, 0.05);
}

.partner-card__rank {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-muted);
  min-width: 2rem;
  text-align: center;
  flex-shrink: 0;
}

.partner-card__rank--gold { color: #d29922; }
.partner-card__rank--silver { color: #8b949e; }
.partner-card__rank--bronze { color: #c0632a; }

.partner-card__info {
  flex: 1;
  min-width: 0;
}

.partner-card__name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-heading);
  margin-bottom: var(--space-xs);
}

.partner-card__tagline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.partner-card__cta {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.1rem;
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color 0.15s;
}

.partner-card__cta:hover {
  background-color: var(--color-primary-hover);
  color: #fff;
}

/* ── 14. CTA PRIMARY ─────────────────────────────────────────────────────── */

.cta-primary {
  background: linear-gradient(135deg, rgba(35,134,54,0.15) 0%, rgba(35,134,54,0.05) 100%);
  border: 1px solid rgba(35, 134, 54, 0.4);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  margin: var(--space-xl) 0;
}

.cta-primary h3 {
  font-size: 1.2rem;
  margin: 0 0 var(--space-sm);
  color: var(--color-heading);
}

.cta-primary p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  font-size: 0.95rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color 0.15s, transform 0.1s;
}

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

.cta-disclaimer {
  display: block;
  margin-top: var(--space-sm);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ── 15. SIDEBAR ─────────────────────────────────────────────────────────── */

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.sidebar-widget {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
}

.sidebar-widget h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-widget ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-widget li {
  border-bottom: 1px solid var(--color-border);
  margin: 0;
}

.sidebar-widget li:last-child {
  border-bottom: none;
}

.sidebar-widget a {
  display: block;
  padding: 0.45rem 0;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.1s;
}

.sidebar-widget a:hover {
  color: var(--color-link);
}

/* ── 16. SOURCES ─────────────────────────────────────────────────────────── */

.sources {
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.sources p {
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.sources ul {
  margin: 0;
  padding-left: 1.2rem;
}

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

.sources a:hover {
  color: var(--color-link);
}

/* ── 17. FOOTER ──────────────────────────────────────────────────────────── */

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0 var(--space-lg);
  margin-top: var(--space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  margin-top: 0;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 0.35rem;
}

.footer-col a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.1s;
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-warning {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.footer-warning a {
  color: var(--color-text-muted);
  text-decoration: underline;
}

/* ── Language switcher ───────────────────────────────────────────────────── */

.lang-switcher {
  position: relative;
  display: inline-flex;
}

.lang-switcher__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.lang-switcher__btn:hover,
.lang-switcher__btn:focus-visible {
  border-color: var(--color-text-muted);
  color: var(--color-text);
  outline: none;
}

.lang-switcher__btn img {
  display: block;
  border-radius: 2px;
}

.lang-switcher__chevron {
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: transform 0.2s;
}

.lang-switcher__btn[aria-expanded="true"] .lang-switcher__chevron {
  transform: rotate(180deg);
}

.lang-switcher__menu {
  display: none;
  position: absolute;
  bottom: calc(100% + 6px);
  right: 0;
  min-width: 130px;
  list-style: none;
  padding: 0.25rem 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  z-index: 100;
}

.lang-switcher__menu.is-open {
  display: block;
}

.lang-switcher__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-decoration: none;
  cursor: default;
}

a.lang-switcher__item {
  cursor: pointer;
}

a.lang-switcher__item:hover {
  background: rgba(255,255,255,0.05);
  color: var(--color-text);
}

.lang-switcher__item--active {
  color: var(--color-text);
  font-weight: 500;
}

.lang-switcher__item img {
  border-radius: 2px;
  flex-shrink: 0;
}

/* ── 18. UTILITY PAGES ───────────────────────────────────────────────────── */

.page-utility .article-content--utility {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.page-utility .article-content--utility h1 {
  margin-bottom: var(--space-lg);
}

/* ── 19. SKIP LINK ───────────────────────────────────────────────────────── */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  z-index: 999;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  top: 0;
}

/* ── 20. UTILITY CLASSES ─────────────────────────────────────────────────── */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.text-muted { color: var(--color-text-muted); }
.text-sm    { font-size: 0.875rem; }
.mt-0       { margin-top: 0; }
.mb-0       { margin-bottom: 0; }