/* ============================================================
   Design System: Emerald Trust Gaming UI
   Project: tk-10.top | Bangladesh Market
   ============================================================ */

:root {
  --color-primary: #0d6e3f;
  --color-primary-dark: #094d2c;
  --color-primary-soft: #e8f5ef;
  --color-secondary: #1a4b8c;
  --color-accent: #f0a828;
  --color-bg: #f7f8fa;
  --color-bg-soft: #eef1f5;
  --color-surface: #ffffff;
  --color-surface-strong: #f0f2f5;
  --color-card: #ffffff;
  --color-card-alt: #f8fafc;
  --color-border: #e2e6eb;
  --color-border-strong: #c8cdd4;
  --color-text: #1a1d23;
  --color-text-soft: #4a5060;
  --color-text-muted: #8090a0;
  --color-success: #0d6e3f;
  --color-warning: #f0a828;
  --color-danger: #d94040;
  --color-footer-bg: #0f1923;
  --color-footer-text: #c0cad5;
  --gradient-hero: linear-gradient(135deg, #0f2b1a 0%, #0d3d28 40%, #1a4b8c 100%);
  --gradient-button: linear-gradient(135deg, #0d6e3f, #1a8050);
  --gradient-button-hover: linear-gradient(135deg, #094d2c, #0d6e3f);
  --gradient-cta: linear-gradient(135deg, #f0a828, #e8960e);
  --shadow-header: 0 2px 12px rgba(0,0,0,.08);
  --shadow-card: 0 2px 8px rgba(0,0,0,.06);
  --shadow-card-hover: 0 8px 24px rgba(0,0,0,.12);
  --shadow-button: 0 2px 6px rgba(13,110,63,.2);
  --shadow-soft: 0 1px 4px rgba(0,0,0,.04);
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;
  --radius-card: 12px;
  --font-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "Noto Sans Bengali", sans-serif;
  --fs-h1: clamp(28px, 4vw, 48px);
  --fs-h2: clamp(22px, 3vw, 36px);
  --fs-h3: clamp(18px, 2.2vw, 24px);
  --fs-body: 17px;
  --fs-small: 14px;
  --fs-nav: clamp(13px, .84vw, 15px);
  --lh-heading: 1.3;
  --lh-body: 1.85;
  --container-max: 1200px;
  --container-narrow: 820px;
  --section-y: clamp(48px, 6vw, 80px);
  --gap-sm: 12px;
  --gap-md: 20px;
  --gap-lg: 32px;
  --header-h: 72px;
  --mobile-header-h: 64px;
  --motion-fast: .15s;
  --motion-normal: .25s;
  --motion-slow: .4s;
  --ease-out: cubic-bezier(.25,.46,.45,.94);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; padding: 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 var(--motion-fast); }
a:hover { color: var(--color-primary-dark); }
h1,h2,h3,h4 { margin: 0 0 16px; line-height: var(--lh-heading); 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 16px; }
ul, ol { padding-left: 24px; margin: 0 0 16px; }
li { margin-bottom: 8px; }
:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-xs); }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }

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

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 1000; width: 100%;
  background: rgba(255,255,255,.97); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-header);
  transition: box-shadow var(--motion-normal);
}
.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, .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 {
  flex: 1 1 auto; min-width: 0;
  display: flex; align-items: center; justify-content: center;
  flex-wrap: nowrap; gap: clamp(6px, .72vw, 14px);
  white-space: nowrap; overflow: visible;
}
.primary-nav a {
  flex: 0 1 auto; min-width: 0;
  padding: 9px clamp(6px, .65vw, 12px);
  font-size: var(--fs-nav); line-height: 1;
  white-space: nowrap; color: var(--color-text-soft);
  border-radius: var(--radius-sm);
  transition: background var(--motion-fast), color var(--motion-fast);
}
.primary-nav a:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.header-actions {
  flex: 0 0 auto; margin-left: auto;
  display: flex; align-items: center; justify-content: flex-end;
  gap: clamp(6px, .6vw, 10px); white-space: nowrap;
}
.nav-toggle { display: none; }

/* Mobile Header */
@media (max-width: 1180px) {
  .header-inner {
    min-height: var(--mobile-header-h);
    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); }
  .primary-nav { display: none; }
  .header-actions { margin-left: auto; }
  .nav-toggle {
    display: inline-flex; flex: 0 0 40px; width: 40px; height: 40px;
    align-items: center; justify-content: center;
    background: transparent; border: 1px solid var(--color-border);
    border-radius: var(--radius-sm); cursor: pointer;
    flex-direction: column; gap: 5px; padding: 10px;
    transition: background var(--motion-fast);
  }
  .nav-toggle:hover { background: var(--color-bg-soft); }
  .hamburger-line { display: block; width: 18px; height: 2px; background: var(--color-text); border-radius: 2px; transition: transform var(--motion-normal); }
}
@media (max-width: 375px) {
  .header-inner { padding-left: 8px; padding-right: 8px; gap: 6px; }
  .site-logo { max-width: 104px; }
  .nav-toggle { flex-basis: 38px; width: 38px; height: 38px; }
}

/* Mobile Menu */
.mobile-menu {
  position: fixed; top: var(--mobile-header-h); left: 0; right: 0;
  background: var(--color-surface); z-index: 999;
  max-height: calc(100vh - var(--mobile-header-h));
  overflow-y: auto; transform: translateY(-100%);
  opacity: 0; visibility: hidden;
  transition: transform var(--motion-normal) var(--ease-out), opacity var(--motion-normal), visibility var(--motion-normal);
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  border-bottom: 1px solid var(--color-border);
}
.mobile-menu.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
.mobile-menu-inner { padding: 16px 20px; display: flex; flex-direction: column; gap: 0; }
.mobile-menu-inner a {
  display: block; padding: 14px 12px; color: var(--color-text);
  border-bottom: 1px solid var(--color-border); font-size: 16px;
}
.mobile-menu-inner a:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.mobile-menu-footer { margin-top: 12px; padding-top: 12px; border-top: 2px solid var(--color-border); }
.mobile-menu-footer a { color: var(--color-text-soft); font-size: 14px; padding: 10px 12px; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border: none; border-radius: var(--radius-md);
  font-size: 16px; font-weight: 600; cursor: pointer;
  transition: all var(--motion-fast); white-space: nowrap;
  text-decoration: none; line-height: 1.2; min-height: 44px;
}
.btn-primary-cta {
  background: var(--gradient-button); color: #fff;
  box-shadow: var(--shadow-button);
}
.btn-primary-cta:hover { background: var(--gradient-button-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(13,110,63,.3); }
.btn-secondary-cta {
  background: transparent; color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-secondary-cta:hover { background: var(--color-primary-soft); color: var(--color-primary-dark); }
.btn-outline-cta { background: transparent; color: var(--color-text-soft); border: 1px solid var(--color-border); }
.btn-outline-cta:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-full { width: 100%; }
.cta-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin: 24px 0; }

/* ============================================================
   SECTIONS
   ============================================================ */
section { padding: var(--section-y) 0; }
section:nth-child(even):not(.home-hero):not(.home-final-cta):not([class*="-intro"]) { background: var(--color-surface); }
section:nth-child(odd):not(.home-hero):not(.home-final-cta):not([class*="-intro"]) { background: var(--color-bg); }

/* Hero */
.home-hero {
  background: var(--gradient-hero); color: #fff;
  padding: clamp(48px, 8vw, 100px) 0;
}
.home-hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.home-hero h1 { font-size: clamp(26px, 3.5vw, 44px); color: #fff; }
.hero-lead { font-size: 18px; color: rgba(255,255,255,.85); line-height: 1.7; }
.hero-cta-group { display: flex; gap: 16px; margin-top: 28px; flex-wrap: wrap; }
.hero-visual img { border-radius: var(--radius-lg); box-shadow: 0 12px 40px rgba(0,0,0,.3); }
@media (max-width: 768px) {
  .home-hero .container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
}

/* Trust Grid */
.trust-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; margin-top: 32px; }
.trust-card {
  background: var(--color-surface); border-radius: var(--radius-card);
  padding: 28px; box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: transform var(--motion-fast), box-shadow var(--motion-fast);
}
.trust-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.trust-card h3 { color: var(--color-primary); font-size: 20px; }

/* Steps */
.steps-timeline { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; margin: 32px 0; }
.step-item {
  background: var(--color-surface); border-radius: var(--radius-card);
  padding: 28px; position: relative; border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--color-primary); color: #fff; font-weight: 700;
  margin-bottom: 12px; font-size: 18px;
}

/* Comparison */
.comparison-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin: 24px 0; }
.compare-item {
  background: var(--color-card-alt); border-radius: var(--radius-card);
  padding: 24px; border-left: 4px solid var(--color-primary);
}

/* Review Cards */
.review-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin: 24px 0; }
.review-card {
  background: var(--color-surface); border-radius: var(--radius-card);
  padding: 24px; box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border); font-style: italic;
  position: relative;
}
.review-card::before { content: '"'; position: absolute; top: 12px; left: 16px; font-size: 48px; color: var(--color-primary-soft); line-height: 1; }

/* FAQ */
.faq-list { max-width: var(--container-narrow); }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; background: var(--color-surface); }
.faq-trigger {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px; background: transparent; border: none; cursor: pointer;
  text-align: left; gap: 16px; transition: background var(--motion-fast);
}
.faq-trigger:hover { background: var(--color-bg-soft); }
.faq-trigger h3 { margin: 0; font-size: 17px; flex: 1; }
.faq-icon { font-size: 24px; color: var(--color-primary); transition: transform var(--motion-normal); flex-shrink: 0; }
.faq-item.is-open .faq-icon { transform: rotate(45deg); }
.faq-answer { padding: 0 20px 18px; }
.faq-answer[hidden] { display: none; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; margin: 20px 0; background: var(--color-surface); border-radius: var(--radius-md); overflow: hidden; }
.data-table th, .data-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--color-border); }
.data-table th { background: var(--color-primary); color: #fff; font-weight: 600; }
.data-table tr:hover td { background: var(--color-primary-soft); }
.membership-table-wrap { overflow-x: auto; }

/* Game Category Cards */
.game-category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin: 24px 0; }
.game-cat-card {
  background: var(--color-surface); border-radius: var(--radius-card);
  padding: 24px; border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  transition: border-color var(--motion-fast), box-shadow var(--motion-fast);
}
.game-cat-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-card-hover); }
.game-cat-card h3 { color: var(--color-primary); }

/* Breadcrumb */
.breadcrumb { font-size: var(--fs-small); color: var(--color-text-muted); margin-bottom: 20px; }
.breadcrumb a { color: var(--color-primary); }
.breadcrumb span[aria-hidden] { margin: 0 8px; }

/* Page Intro */
[class*="-intro"] { background: var(--gradient-hero); color: #fff; padding: clamp(36px, 5vw, 60px) 0; }
[class*="-intro"] h1 { color: #fff; }
[class*="-intro"] .intro-lead { color: rgba(255,255,255,.85); font-size: 17px; max-width: var(--container-narrow); }
[class*="-intro"] .breadcrumb a { color: rgba(255,255,255,.7); }
[class*="-intro"] .breadcrumb { color: rgba(255,255,255,.5); }
[class*="-intro"] img { margin-top: 28px; border-radius: var(--radius-lg); box-shadow: 0 8px 32px rgba(0,0,0,.2); }

/* Auth Pages */
.auth-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.auth-form-card {
  background: var(--color-surface); border-radius: var(--radius-lg);
  padding: 36px; box-shadow: var(--shadow-card); border: 1px solid var(--color-border);
}
.auth-trust-card {
  background: var(--color-card-alt); border-radius: var(--radius-lg);
  padding: 28px; border: 1px solid var(--color-border);
}
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; color: var(--color-text); font-size: 15px; }
.form-group input {
  width: 100%; padding: 14px 16px; border: 1px solid var(--color-border);
  border-radius: var(--radius-md); font-size: 16px; font-family: var(--font-base);
  transition: border-color var(--motion-fast), box-shadow var(--motion-fast);
  background: var(--color-surface);
}
.form-group input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(13,110,63,.15); outline: none; }
.form-note { text-align: center; margin-top: 16px; color: var(--color-text-soft); font-size: 14px; }
.form-terms { font-size: 13px; color: var(--color-text-muted); margin-bottom: 16px; }
.trust-list { list-style: none; padding: 0; }
.trust-list li { padding: 8px 0; padding-left: 24px; position: relative; color: var(--color-text-soft); }
.trust-list li::before { content: "✓"; position: absolute; left: 0; color: var(--color-primary); font-weight: 700; }
@media (max-width: 768px) { .auth-layout { grid-template-columns: 1fr; } }

/* Register Steps */
.steps-flow { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin: 24px 0; }
.step-card { background: var(--color-surface); border-radius: var(--radius-card); padding: 24px; border: 1px solid var(--color-border); }
.step-badge { display: inline-block; background: var(--color-primary); color: #fff; padding: 4px 12px; border-radius: var(--radius-pill); font-size: 13px; font-weight: 700; margin-bottom: 12px; }

/* Checklist Grid */
.checklist-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin: 20px 0; }
.check-item { background: var(--color-card-alt); padding: 20px; border-radius: var(--radius-md); border-left: 3px solid var(--color-primary); }

/* Habit Cards */
.habit-cards { display: grid; grid-template-columns: 1fr; gap: 16px; margin: 20px 0; }
.habit-card { background: var(--color-card-alt); padding: 24px; border-radius: var(--radius-card); border: 1px solid var(--color-border); }

/* Page Guide Grid */
.page-guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 20px 0; }
.page-guide-card { background: var(--color-surface); padding: 20px; border-radius: var(--radius-md); border: 1px solid var(--color-border); }

/* Content Lists */
.content-list { margin: 16px 0; }
.content-list li { padding: 4px 0; }
.tips-list, .audience-list, .responsible-list { margin: 16px 0; }

/* Related Links */
.related-links-grid { display: flex; flex-wrap: wrap; gap: 12px; margin: 16px 0; }
.related-links-grid a {
  display: inline-flex; padding: 10px 20px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-pill); color: var(--color-primary);
  font-size: 14px; transition: all var(--motion-fast);
}
.related-links-grid a:hover { background: var(--color-primary-soft); border-color: var(--color-primary); }

/* Summary Links */
.summary-links ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.summary-links a { display: inline-block; padding: 8px 16px; background: var(--color-primary-soft); border-radius: var(--radius-sm); font-size: 14px; }

/* Final CTA */
.home-final-cta { background: var(--gradient-hero); color: #fff; }
.home-final-cta .container { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.home-final-cta h2 { color: #fff; }
.home-final-cta p { color: rgba(255,255,255,.85); }
.cta-trust-note { font-size: 14px; color: rgba(255,255,255,.6); }
.cta-trust-note a { color: rgba(255,255,255,.8); text-decoration: underline; }
@media (max-width: 768px) { .home-final-cta .container { grid-template-columns: 1fr; } }

/* Responsible Note */
.responsible-note { background: rgba(13,110,63,.08); padding: 20px; border-radius: var(--radius-md); border-left: 4px solid var(--color-primary); margin-top: 16px; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--color-footer-bg); color: var(--color-footer-text); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: 32px; }
.footer-brand img { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: var(--color-footer-text); }
.footer-links h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-links ul { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--color-footer-text); font-size: 14px; transition: color var(--motion-fast); }
.footer-links a:hover { color: var(--color-accent); }
.footer-bottom { margin-top: 40px; padding: 20px 0; border-top: 1px solid rgba(255,255,255,.1); text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,.5); margin: 4px 0; }
.footer-disclaimer { font-size: 12px; color: rgba(255,255,255,.35); }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* ============================================================
   404 PAGE
   ============================================================ */
.page-404 main { text-align: center; padding: 80px 20px; min-height: 50vh; display: flex; align-items: center; justify-content: center; flex-direction: column; }
.page-404 h1 { font-size: 72px; color: var(--color-primary); }

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

/* ============================================================
   RESPONSIVE FINE-TUNING
   ============================================================ */
@media (max-width: 414px) {
  body { font-size: 16px; }
  section { padding: clamp(32px, 5vw, 48px) 0; }
  .container { padding: 0 14px; }
  .cta-buttons { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}