/* ============================================
   99Exchange - Central Stylesheet
   Theme: Dark Black + Golden CTA (#F8AD1B)
   ============================================ */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0b0b0b;
  --bg-secondary: #121212;
  --bg-card: #1a1a1a;
  --bg-card-hover: #222222;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #777777;
  --cta-gold: #F8AD1B;
  --cta-gold-hover: #FFBE3D;
  --cta-gold-dark: #D4920F;
  --accent-gold: #FFBE3D;
  --border-color: #2a2a2a;
  --border-light: #333333;
  --header-bg: rgba(11, 11, 11, 0.95);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-main: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --container-width: 1200px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--cta-gold-hover);
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-primary);
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  font-family: var(--font-main);
}

.btn-primary {
  background: var(--cta-gold);
  color: #000;
}

.btn-primary:hover {
  background: var(--cta-gold-hover);
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(248, 173, 27, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--cta-gold);
  border: 2px solid var(--cta-gold);
}

.btn-outline:hover {
  background: var(--cta-gold);
  color: #000;
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.btn-sm {
  padding: 10px 22px;
  font-size: 0.9rem;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.1rem;
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  height: 44px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-menu a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-primary);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cta-gold);
  transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

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

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 72px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('assets/hero-bg.webp') center center / cover no-repeat;
  z-index: 0;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(11, 11, 11, 0.7) 0%,
    rgba(11, 11, 11, 0.85) 60%,
    var(--bg-primary) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 750px;
  padding: 60px 20px;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -1px;
  line-height: 1.15;
}

.hero-content h1 .highlight {
  color: var(--cta-gold);
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 50px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

.hero-stat {
  text-align: center;
}

.hero-stat .number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--cta-gold);
}

.hero-stat .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --- Section Common --- */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-header h2 {
  margin-bottom: 14px;
}

.section-header p {
  max-width: 650px;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* --- Feature Cards / Grid --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: var(--transition);
}

.card:hover {
  border-color: var(--cta-gold);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(248, 173, 27, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.card-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--cta-gold);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* --- Image + Text Split --- */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.split-section.reverse {
  direction: rtl;
}

.split-section.reverse > * {
  direction: ltr;
}

.split-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  max-width: 380px;
  justify-self: center;
}

.split-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

.split-text h2 {
  margin-bottom: 16px;
}

.split-text p {
  margin-bottom: 16px;
}

.split-text .btn {
  margin-top: 10px;
}

/* --- App Section Layout --- */
.app-section-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.app-cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* --- Steps --- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  position: relative;
  transition: var(--transition);
}

.step:hover {
  border-color: var(--cta-gold);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--cta-gold);
  color: #000;
  border-radius: 50%;
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 16px;
}

.step h4 {
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* --- Sport Cards --- */
.sport-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.sport-card:hover {
  border-color: var(--cta-gold);
  transform: translateY(-4px);
}

.sport-card .sport-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  background: rgba(248, 173, 27, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sport-card .sport-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--cta-gold);
  fill: none;
  stroke-width: 2;
}

.sport-card h4 {
  margin-bottom: 6px;
}

.sport-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* --- Table --- */
.info-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.info-table th,
.info-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.info-table th {
  background: rgba(248, 173, 27, 0.08);
  color: var(--cta-gold);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-table td {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

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

/* --- Compare Table --- */
.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.compare-table th,
.compare-table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.compare-table thead th {
  background: rgba(248, 173, 27, 0.1);
  color: var(--cta-gold);
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.compare-table thead th:first-child {
  width: 22%;
}

.compare-table tbody td:first-child {
  color: var(--text-primary);
  font-weight: 600;
}

.compare-table tbody td:nth-child(2) {
  color: #34d399;
}

.compare-table tbody td:nth-child(3) {
  color: var(--text-secondary);
}

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

.compare-table tbody tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

@media (max-width: 768px) {
  .compare-table th,
  .compare-table td {
    padding: 12px 14px;
    font-size: 0.85rem;
  }

  .compare-table thead th {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .compare-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* --- Testimonials --- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.testimonial {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 16px;
  line-height: 1.7;
}

.testimonial-author {
  font-weight: 600;
  color: var(--cta-gold);
  font-size: 0.9rem;
}

/* --- FAQ / Accordion --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg-card);
}

.faq-item summary {
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  color: var(--text-primary);
  transition: var(--transition);
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--cta-gold);
  transition: var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--border-color);
}

.faq-answer {
  padding: 18px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, rgba(248, 173, 27, 0.12), rgba(248, 173, 27, 0.03));
  border: 1px solid rgba(248, 173, 27, 0.2);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
}

.cta-banner h2 {
  margin-bottom: 14px;
}

.cta-banner p {
  max-width: 550px;
  margin: 0 auto 28px;
  color: var(--text-secondary);
}

/* --- Footer --- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-about .logo {
  margin-bottom: 16px;
}

.footer-about p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links a {
  display: block;
  padding: 4px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

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

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.payment-icons {
  display: flex;
  gap: 12px;
  align-items: center;
}

.payment-icons img {
  height: 28px;
  opacity: 0.6;
  transition: var(--transition);
}

.payment-icons img:hover {
  opacity: 1;
}

/* --- Form Elements --- */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-main);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--cta-gold);
  box-shadow: 0 0 0 3px rgba(248, 173, 27, 0.15);
}

.form-control::placeholder {
  color: var(--text-muted);
}

/* --- Auth Pages --- */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 20px 40px;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}

.auth-card h2 {
  text-align: center;
  margin-bottom: 8px;
}

.auth-card .auth-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 30px;
}

.auth-card .btn {
  width: 100%;
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.auth-footer a {
  color: var(--cta-gold);
  font-weight: 600;
}

/* --- Page Header --- */
.page-header {
  padding: 120px 0 50px;
  text-align: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
  margin-bottom: 12px;
}

.page-header p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-muted);
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-gold { color: var(--cta-gold); }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .split-section {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .split-section.reverse {
    direction: ltr;
  }
  .app-section-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.25rem; }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 20px;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu a {
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
    width: 100%;
  }

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

  .menu-toggle {
    display: flex;
  }

  .header-actions .btn {
    padding: 8px 16px;
    font-size: 0.85rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .app-cards-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .section {
    padding: 50px 0;
  }

  .cta-banner {
    padding: 40px 20px;
  }

  .info-table {
    font-size: 0.85rem;
  }

  .info-table th,
  .info-table td {
    padding: 10px 14px;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .auth-card {
    padding: 28px 20px;
  }

  .container {
    padding: 0 16px;
  }
}