/* ============================================================
   tk688 — Emerald Trust Gaming UI
   Design System: Original Bangladesh-first gaming platform
   ============================================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
  --color-primary: #047857;
  --color-primary-dark: #065f46;
  --color-primary-soft: #d1fae5;
  --color-secondary: #0ea5e9;
  --color-accent: #f59e0b;
  --color-accent-2: #dc2626;
  --color-bg: #f0fdf4;
  --color-bg-soft: #f6fbf7;
  --color-surface: #ffffff;
  --color-surface-strong: #ecfdf5;
  --color-card: #ffffff;
  --color-card-alt: #e6f4ea;
  --color-border: #d1d5db;
  --color-border-strong: #9ca3af;
  --color-text: #0f2419;
  --color-text-soft: #4b6354;
  --color-text-muted: #6b7f72;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-footer-bg: #0a1f14;
  --color-footer-text: #d1fae5;

  --gradient-hero: linear-gradient(135deg, #064e3b 0%, #0a3d2e 50%, #1a472a 100%);
  --gradient-button: linear-gradient(135deg, var(--color-primary), #059669);
  --gradient-button-hover: linear-gradient(135deg, #059669, var(--color-primary));
  --gradient-cta: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  --gradient-footer: linear-gradient(180deg, #0a1f14, #071510);

  --shadow-header: 0 2px 16px rgba(0,0,0,0.08);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-button: 0 4px 14px rgba(4,120,87,0.25);
  --shadow-soft: 0 2px 8px rgba(0,0,0,0.04);

  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  --font-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "Noto Sans Bengali", sans-serif;
  --fs-h1: clamp(2rem, 4.5vw, 3.5rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.25rem);
  --fs-h3: clamp(1.15rem, 2vw, 1.5rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-nav: clamp(13px, 0.84vw, 15px);
  --lh-body: 1.8;
  --lh-heading: 1.2;

  --container-max: 1200px;
  --section-y: clamp(48px, 6vw, 80px);
  --header-h: 72px;
  --mobile-header-h: 64px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary-dark); }
h1, h2, h3, h4 { line-height: var(--lh-heading); margin: 0 0 0.75em; font-weight: 800; color: var(--color-text); }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.5em; }

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 24px);
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  box-shadow: var(--shadow-header);
}
.header-inner {
  width: 100%;
  max-width: none;
  padding-left: clamp(10px, 1.2vw, 20px);
  padding-right: clamp(10px, 1.2vw, 20px);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(10px, 1vw, 18px);
}
.brand-wrap {
  flex: 0 0 auto;
  margin-right: clamp(4px, 0.8vw, 14px);
  display: flex;
  align-items: center;
}
.site-logo {
  display: block;
  width: auto;
  height: clamp(32px, 3vw, 42px);
  max-width: clamp(118px, 10vw, 168px);
  object-fit: contain;
}

/* Primary Nav */
.primary-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  gap: clamp(4px, 0.6vw, 12px);
  white-space: nowrap;
  overflow: visible;
}
.primary-nav .nav-link {
  flex: 0 1 auto;
  min-width: 0;
  padding: 8px clamp(6px, 0.65vw, 12px);
  font-size: var(--fs-nav);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  color: var(--color-text);
  border-radius: var(--radius-pill);
  transition: background 0.2s, color 0.2s;
}
.primary-nav .nav-link:hover,
.primary-nav .nav-link.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

/* Header Actions */
.header-actions {
  flex: 0 0 auto;
  margin-left: auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(6px, 0.6vw, 10px);
  white-space: nowrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-family: var(--font-base);
  font-size: var(--fs-small);
  font-weight: 700;
  line-height: 1;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-button);
  color: #fff;
  box-shadow: var(--shadow-button);
}
.btn-primary:hover {
  background: var(--gradient-button-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(4,120,87,0.3);
  color: #fff;
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary-dark);
  border: 1.5px solid var(--color-primary);
}
.btn-secondary:hover {
  background: var(--color-surface);
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}
.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}
.btn-register {
  background: var(--gradient-button);
  color: #fff;
  min-height: 40px;
  padding: 0 16px;
  font-weight: 800;
  box-shadow: var(--shadow-button);
}
.btn-register:hover { color: #fff; transform: translateY(-1px); }
.btn-login {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  min-height: 40px;
  padding: 0 14px;
  font-weight: 700;
}
.btn-login:hover { background: var(--color-primary-soft); color: var(--color-primary-dark); }

/* Nav Toggle (Mobile) */
.nav-toggle {
  display: none;
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
}
.hamburger-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(16px);
  z-index: 999;
  overflow-y: auto;
  padding: 20px;
}
.mobile-menu.is-open { display: block; }
.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav .nav-link {
  display: block;
  padding: 14px 16px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background 0.15s;
}
.mobile-nav .nav-link:hover,
.mobile-nav .nav-link.active { background: var(--color-primary-soft); color: var(--color-primary); }
.mobile-nav-cta {
  display: block;
  text-align: center;
  padding: 14px;
  margin-top: 8px;
  font-weight: 800;
  border-radius: var(--radius-pill);
  background: var(--gradient-button);
  color: #fff;
}
.mobile-nav-cta--secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

/* ============================================================
   HERO
   ============================================================ */
.hero-home {
  background: var(--gradient-hero);
  color: #fff;
  padding: clamp(48px, 8vw, 100px) 0;
}
.hero-home-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 24px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.hero-kicker {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.hero-title { font-size: var(--fs-h1); color: #fff; margin-bottom: 16px; }
.hero-lead { font-size: 1.05rem; line-height: 1.7; color: rgba(255,255,255,0.85); margin-bottom: 16px; }
.hero-home-text p { color: rgba(255,255,255,0.8); }
.hero-cta-group { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 16px; }
.hero-cta-group .btn-primary { background: var(--color-accent); color: #0f2419; box-shadow: 0 4px 16px rgba(245,158,11,0.3); }
.hero-cta-group .btn-primary:hover { background: #fbbf24; color: #0f2419; }
.hero-cta-group .btn-secondary {
  background: #f8fffb;
  border-color: #f8fffb;
  color: var(--color-primary-dark);
}
.hero-cta-group .btn-secondary:hover {
  background: #f8fffb;
  border-color: #f8fffb;
  color: var(--color-primary-dark);
}
.hero-disclaimer { font-size: 0.8rem; color: rgba(255,255,255,0.5); }
.hero-home-visual { display: flex; justify-content: center; }
.hero-img {
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 64px rgba(0,0,0,0.3);
  max-height: 420px;
  object-fit: cover;
}

/* Inner Hero */
.inner-hero {
  background: linear-gradient(135deg, var(--color-surface-strong), var(--color-bg));
  padding: var(--section-y) 0;
  border-bottom: 1px solid var(--color-border);
}
.inner-hero h1 { color: var(--color-text); }
.inner-hero .hero-lead { color: var(--color-text-soft); }

.auth-section {
  padding: 24px 0 8px;
  background: linear-gradient(180deg, rgba(232, 246, 238, 0.65), rgba(255,255,255,0));
}
.auth-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 24px;
  align-items: start;
}
.auth-card,
.auth-side-card {
  background: #fff;
  border: 1px solid rgba(4,120,87,0.12);
  border-radius: var(--radius-xl);
  box-shadow: 0 18px 48px rgba(15,36,25,0.08);
}
.auth-card { padding: 28px; }
.auth-side-card { padding: 24px; }
.auth-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  margin-bottom: 12px;
  border-radius: 999px;
  background: rgba(4,120,87,0.08);
  color: var(--color-primary-dark);
  font-size: 0.8rem;
  font-weight: 700;
}
.auth-title {
  margin: 0 0 8px;
  color: var(--color-text);
}
.auth-intro {
  margin: 0 0 22px;
  color: var(--color-text-soft);
  line-height: 1.7;
}
.auth-form {
  display: grid;
  gap: 18px;
}
.auth-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.auth-field {
  display: grid;
  gap: 8px;
}
.auth-field--full {
  grid-column: 1 / -1;
}
.auth-field label {
  color: var(--color-text);
  font-weight: 700;
  font-size: 0.95rem;
}
.auth-input,
.auth-select {
  width: 100%;
  min-height: 52px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(4,120,87,0.18);
  background: #fdfefe;
  color: var(--color-text);
  font: inherit;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.auth-input:focus,
.auth-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(4,120,87,0.12);
  background: #fff;
}
.auth-help {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 0.84rem;
  line-height: 1.55;
}
.auth-inline {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: end;
}
.auth-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--color-text-soft);
  font-size: 0.92rem;
  line-height: 1.55;
}
.auth-check input {
  margin-top: 3px;
  accent-color: var(--color-primary);
}
.auth-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.auth-submit {
  min-width: 180px;
  justify-content: center;
}
.auth-text-link {
  color: var(--color-primary-dark);
  font-weight: 700;
  text-decoration: none;
}
.auth-text-link:hover {
  color: var(--color-primary);
}
.auth-side-card h3 {
  margin-top: 0;
  margin-bottom: 14px;
}
.auth-benefits,
.auth-steps {
  margin: 0;
  padding-left: 18px;
  color: var(--color-text-soft);
  line-height: 1.75;
}
.auth-meta {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(4,120,87,0.1);
  display: grid;
  gap: 12px;
}
.auth-meta-item strong {
  display: block;
  margin-bottom: 4px;
  color: var(--color-text);
}
.auth-meta-item span {
  color: var(--color-text-soft);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ============================================================
   CONTENT SECTIONS
   ============================================================ */
.content-section, [data-seo-body="true"] {
  padding: var(--section-y) 0;
}
.content-section + .content-section,
[data-seo-body="true"] + [data-seo-body="true"] {
  border-top: 1px solid rgba(0,0,0,0.04);
}
.page-home .content-section:nth-child(even),
.page-game .content-section:nth-child(even),
.page-category .content-section:nth-child(even) {
  background: var(--color-surface);
}
.content-img {
  border-radius: var(--radius-lg);
  margin: 24px 0;
  box-shadow: var(--shadow-card);
}

/* Breadcrumb */
.breadcrumb-nav { margin-bottom: 20px; }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: var(--fs-small);
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "›";
  margin-right: 6px;
  color: var(--color-text-muted);
}
.breadcrumb-item a { color: var(--color-primary); }
.breadcrumb-item.active { color: var(--color-text-muted); }

/* CTA Section */
.section-cta, .section-cta-final {
  background: linear-gradient(135deg, var(--color-surface-strong), var(--color-primary-soft));
  padding: var(--section-y) 0;
  text-align: center;
}
.cta-buttons { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 20px; }

/* ============================================================
   FAQ
   ============================================================ */
.section-faq-home { padding: var(--section-y) 0; background: var(--color-surface); }
.faq-list { max-width: 800px; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  overflow: hidden;
  background: var(--color-card);
}
.faq-question {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 16px 20px;
  font-size: 1rem;
  font-weight: 700;
  text-align: left;
  background: var(--color-card-alt);
  border: none;
  cursor: pointer;
  color: var(--color-text);
  font-family: var(--font-base);
  transition: background 0.15s;
}
.faq-question:hover { background: var(--color-primary-soft); }
.faq-question[aria-expanded="true"] { background: var(--color-primary-soft); color: var(--color-primary); }
.faq-answer {
  display: none;
  padding: 16px 20px;
  color: var(--color-text-soft);
  line-height: 1.7;
}
.faq-answer.is-open { display: block; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--gradient-footer);
  color: var(--color-footer-text);
  padding: 60px 0 0;
}
.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 24px);
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 32px;
}
.footer-brand-name { display: block; font-size: 1.3rem; font-weight: 900; margin-bottom: 12px; color: #fff; }
.footer-brand-desc { font-size: var(--fs-small); color: rgba(209,250,229,0.7); line-height: 1.6; margin-bottom: 12px; }
.footer-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.footer-badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.7rem;
  font-weight: 800;
  border-radius: var(--radius-xs);
  background: rgba(255,255,255,0.1);
  color: var(--color-accent);
  letter-spacing: 0.04em;
}
.footer-col-title {
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 14px;
}
.footer-link-grid { display: flex; flex-direction: column; gap: 8px; }
.footer-link-grid a {
  color: rgba(209,250,229,0.65);
  font-size: var(--fs-small);
  font-weight: 600;
  transition: color 0.15s;
}
.footer-link-grid a:hover { color: #fff; }
.footer-contact-email { font-size: var(--fs-small); color: rgba(209,250,229,0.8); margin-bottom: 8px; }
.footer-contact-note { font-size: 0.8rem; color: rgba(209,250,229,0.5); }
.footer-bottom {
  max-width: var(--container-max);
  margin: 40px auto 0;
  padding: 20px clamp(16px, 3vw, 24px);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-small);
  color: rgba(209,250,229,0.4);
}
.footer-bottom a { color: rgba(209,250,229,0.5); }
.footer-bottom a:hover { color: #fff; }

/* ============================================================
   ERROR 404
   ============================================================ */
.error-section { padding: 80px 0; text-align: center; }
.error-container { max-width: 600px; margin: 0 auto; }
.error-code {
  font-size: clamp(5rem, 12vw, 9rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.error-links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 24px; }
.error-links a {
  padding: 10px 20px;
  background: var(--color-card-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-weight: 700;
  transition: border-color 0.15s;
}
.error-links a:hover { border-color: var(--color-primary); }

/* ============================================================
   FOCUS & ACCESSIBILITY
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================================
   SWIPER DEGRADATION
   ============================================================ */
.swiper:not(.swiper-initialized) {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}
.swiper:not(.swiper-initialized) .swiper-slide {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

/* AOS Degradation */
[data-aos] { opacity: 1 !important; transform: none !important; }

/* ============================================================
   RESPONSIVE — Tablet
   ============================================================ */
@media (max-width: 1180px) {
  .primary-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .header-inner {
    width: 100%;
    max-width: none;
    padding-left: clamp(8px, 2.4vw, 14px);
    padding-right: clamp(8px, 2.4vw, 14px);
    justify-content: flex-start;
    gap: clamp(6px, 1.8vw, 10px);
  }
  .brand-wrap { flex: 0 1 auto; margin-right: 0; }
  .site-logo { height: clamp(30px, 8vw, 40px); max-width: clamp(104px, 27vw, 138px); }
  .header-actions {
    margin-left: auto;
    flex: 0 0 auto;
    justify-content: flex-end;
    gap: clamp(5px, 1.6vw, 8px);
  }
  .header-actions .btn { min-height: 40px; padding-inline: clamp(10px, 2.6vw, 14px); font-size: clamp(12px, 3.2vw, 14px); }
  .nav-toggle { flex: 0 0 40px; width: 40px; height: 40px; margin-left: 2px; }
  .hero-home-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-home-visual { order: -1; }
  .hero-cta-group { justify-content: center; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .auth-shell { grid-template-columns: 1fr; }
}

/* ============================================================
   RESPONSIVE — Mobile
   ============================================================ */
@media (max-width: 768px) {
  :root { --section-y: 40px; --header-h: 64px; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero-img { max-height: 280px; }
  .auth-card,
  .auth-side-card { padding: 20px; }
  .auth-grid,
  .auth-inline { grid-template-columns: 1fr; }
  .auth-actions { flex-direction: column; align-items: stretch; }
  .auth-submit,
  .auth-actions .btn { width: 100%; }
}

@media (max-width: 414px) {
  .hero-home { padding: 32px 0; }
  .hero-title { font-size: 1.6rem; }
  .btn-lg { padding: 12px 20px; font-size: 0.9rem; }
}

@media (max-width: 375px) {
  .header-inner { padding-left: 8px; padding-right: 8px; gap: 6px; }
  .site-logo { max-width: 104px; }
  .header-actions .btn { min-height: 38px; padding-inline: 9px; font-size: 12px; }
  .nav-toggle { flex-basis: 38px; width: 38px; height: 38px; }
}