:root {
  --color-primary: #22c55e;
  --color-primary-dark: #16a34a;
  --color-primary-soft: rgba(34,197,94,.12);
  --color-secondary: #10b981;
  --color-accent: #f59e0b;
  --color-bg: #020e08;
  --color-bg-soft: #071a12;
  --color-surface: #0a2318;
  --color-surface-strong: #0d3024;
  --color-card: linear-gradient(135deg, rgba(10,35,24,.95), rgba(7,26,18,.95));
  --color-card-alt: linear-gradient(135deg, rgba(13,48,36,.9), rgba(10,30,20,.9));
  --color-border: rgba(34,197,94,.18);
  --color-border-strong: rgba(34,197,94,.35);
  --color-text: #e8f5ee;
  --color-text-soft: #b8d4c4;
  --color-text-muted: #7a9e8a;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-footer-bg: rgba(2,8,5,.96);
  --color-footer-text: #c4e0d0;
  --gradient-hero: linear-gradient(160deg, #020e08 0%, #0a2318 40%, #071a12 100%);
  --gradient-button: linear-gradient(135deg, #22c55e, #10b981);
  --gradient-button-hover: linear-gradient(135deg, #16a34a, #059669);
  --gradient-cta: linear-gradient(135deg, rgba(34,197,94,.15), rgba(16,185,129,.08));
  --shadow-header: 0 2px 20px rgba(0,0,0,.4);
  --shadow-card: 0 8px 32px rgba(0,0,0,.25);
  --shadow-card-hover: 0 16px 48px rgba(0,0,0,.35);
  --shadow-button: 0 4px 16px rgba(34,197,94,.25);
  --shadow-soft: 0 2px 8px rgba(0,0,0,.15);
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --radius-card: 18px;
  --font-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "Noto Sans Bengali", sans-serif;
  --fs-h1: clamp(1.8rem, 4vw, 2.8rem);
  --fs-h2: clamp(1.4rem, 3vw, 2rem);
  --fs-h3: clamp(1.1rem, 2vw, 1.4rem);
  --fs-body: clamp(0.95rem, 1.1vw, 1.05rem);
  --fs-small: 0.875rem;
  --fs-nav: clamp(13px, .84vw, 15px);
  --lh-body: 1.85;
  --lh-heading: 1.3;
  --section-y: clamp(3rem, 5vw, 5rem);
  --container-max: 1200px;
  --container-narrow: 820px;
  --gap-sm: 1rem;
  --gap-md: 1.5rem;
  --gap-lg: 2.5rem;
  --header-h: 72px;
  --motion-fast: 150ms;
  --motion-normal: 250ms;
  --motion-slow: 400ms;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; padding: 0;
  font-family: var(--font-base);
  background: var(--gradient-hero);
  color: var(--color-text);
  line-height: var(--lh-body);
  font-size: var(--fs-body);
  overflow-x: hidden;
  min-height: 100vh;
}
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-secondary); }
h1,h2,h3,h4,h5,h6 { color: #f0fff5; font-weight: 800; line-height: var(--lh-heading); margin: 0 0 1rem; }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0 0 1rem; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: 4px; }

.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 clamp(1rem, 3vw, 2rem); }
.section { padding: var(--section-y) 0; }
.section-alt { background: var(--color-bg-soft); }
.section-surface { background: var(--color-surface); }

/* HEADER */
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(2,14,8,.94); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255,255,255,.06); }
.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); }
.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); font-weight: 600; border-radius: var(--radius-xs);
  transition: color var(--motion-fast), background var(--motion-fast);
}
.primary-nav a:hover, .primary-nav a.active { color: var(--color-primary); background: var(--color-primary-soft); }
.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;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 42px; padding: 0 clamp(12px, 1.2vw, 20px);
  font-weight: 700; font-size: var(--fs-small); border-radius: var(--radius-pill);
  border: none; cursor: pointer; white-space: nowrap;
  transition: all var(--motion-fast);
}
.btn-register { background: var(--gradient-button); color: #042214; box-shadow: var(--shadow-button); }
.btn-register:hover { background: var(--gradient-button-hover); transform: translateY(-1px); color: #021a0d; }
.btn-login { background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary); }
.btn-login:hover { background: var(--color-primary-soft); }
.nav-toggle { display: none; flex: 0 0 40px; width: 40px; height: 40px; background: none; border: none; cursor: pointer; padding: 8px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all var(--motion-normal); }

/* MOBILE MENU */
.mobile-menu {
  display: none; position: fixed; top: var(--header-h); left: 0; right: 0;
  background: rgba(2,14,8,.98); backdrop-filter: blur(16px);
  max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  border-top: 1px solid var(--color-border);
  transform: translateY(-10px); opacity: 0;
  transition: transform var(--motion-normal), opacity var(--motion-normal);
}
.mobile-menu.is-open { display: block; transform: translateY(0); opacity: 1; }
.mobile-menu-inner { padding: 1rem; }
.mobile-menu-inner a {
  display: block; padding: 14px 16px; color: var(--color-text); font-weight: 600;
  border-radius: var(--radius-sm); transition: background var(--motion-fast);
}
.mobile-menu-inner a:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.mobile-menu-cta { display: flex; gap: 10px; padding: 16px; border-top: 1px solid var(--color-border); margin-top: 8px; }
.mobile-menu-cta .btn { flex: 1; text-align: center; }

@media (max-width: 1180px) {
  .primary-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .header-inner { padding-left: clamp(8px,2.4vw,14px); padding-right: clamp(8px,2.4vw,14px); gap: clamp(6px,1.8vw,10px); }
  .brand-wrap { margin-right: 0; }
  .site-logo { height: clamp(30px,8vw,40px); max-width: clamp(104px,27vw,138px); }
  .header-actions { margin-left: auto; 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 { margin-left: 2px; }
}
@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; }
}

/* BREADCRUMB */
.breadcrumb-bar { padding: 12px 0; background: var(--color-bg-soft); border-bottom: 1px solid var(--color-border); }
.breadcrumb-list { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: var(--fs-small); color: var(--color-text-muted); }
.breadcrumb-list a { color: var(--color-text-soft); }
.breadcrumb-list a:hover { color: var(--color-primary); }
.breadcrumb-list .sep { color: var(--color-text-muted); opacity: .6; }

/* HERO VARIANTS */
.hero-home { padding: clamp(4rem,8vw,7rem) 0 clamp(3rem,5vw,4rem); position: relative; overflow: hidden; }
.hero-home::before { content: ""; position: absolute; top: -20%; right: -10%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(34,197,94,.15), transparent 65%); filter: blur(40px); pointer-events: none; }
.hero-inner { padding: clamp(2.5rem,4vw,4rem) 0 clamp(2rem,3vw,3rem); }
.hero-compact { padding: clamp(2rem,3vw,3rem) 0; }
.hero-badge { display: inline-flex; align-items: center; gap: .5rem; padding: .5rem 1rem; border-radius: var(--radius-pill); background: var(--color-primary-soft); border: 1px solid var(--color-border-strong); color: #b0f0c8; font-size: var(--fs-small); margin-bottom: 1.2rem; }
.hero-lead { color: var(--color-text-soft); font-size: clamp(1rem, 1.2vw, 1.1rem); max-width: 680px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 1.5rem; }
.hero-media { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border); box-shadow: var(--shadow-card); }
.hero-media img { width: 100%; display: block; }

/* GRID LAYOUTS */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap-md); }
.grid-2-1 { display: grid; grid-template-columns: 1.1fr .9fr; gap: var(--gap-lg); align-items: start; }
.grid-1-2 { display: grid; grid-template-columns: .9fr 1.1fr; gap: var(--gap-lg); align-items: start; }
.grid-text-img { display: grid; grid-template-columns: 1.2fr .8fr; gap: var(--gap-lg); align-items: center; }
.grid-img-text { display: grid; grid-template-columns: .8fr 1.2fr; gap: var(--gap-lg); align-items: center; }

/* CARDS */
.card-glass { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-card); padding: clamp(1.2rem,2vw,1.8rem); box-shadow: var(--shadow-card); transition: transform var(--motion-normal), box-shadow var(--motion-normal); }
.card-glass:hover { transform: translateY(-3px); box-shadow: var(--shadow-card-hover); }
.card-alt { background: var(--color-card-alt); }
.card-accent { border-left: 4px solid var(--color-primary); }
.card-warning { border-left: 4px solid var(--color-warning); }
.card-icon { width: 52px; height: 52px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; background: var(--color-primary-soft); color: var(--color-primary); font-size: 1.4rem; margin-bottom: 1rem; border: 1px solid var(--color-border); }
.card-step-num { font-size: var(--fs-small); font-weight: 700; color: #9ff0bd; letter-spacing: .05em; text-transform: uppercase; margin-bottom: .5rem; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--gap-md); }

/* CTA SECTIONS */
.cta-band { padding: clamp(2rem,4vw,3rem); border-radius: var(--radius-lg); background: var(--gradient-cta); border: 1px solid var(--color-border-strong); }
.cta-inline { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; }
.cta-center { text-align: center; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; background: var(--color-surface); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.2rem; background: none; border: none; color: var(--color-text); font-weight: 700; font-size: 1rem; cursor: pointer; text-align: left; font-family: inherit; transition: background var(--motion-fast); }
.faq-question:hover { background: var(--color-primary-soft); }
.faq-question::after { content: "+"; font-size: 1.3rem; color: var(--color-primary); transition: transform var(--motion-normal); flex-shrink: 0; margin-left: 12px; }
.faq-question[aria-expanded="true"]::after { content: "−"; }
.faq-answer { display: none; padding: 0 1.2rem 1.2rem; color: var(--color-text-soft); line-height: 1.8; }
.faq-answer.is-open { display: block; }

/* TABLES */
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.data-table { width: 100%; border-collapse: collapse; color: var(--color-text); }
.data-table th, .data-table td { padding: 1rem; border-bottom: 1px solid var(--color-border); text-align: left; }
.data-table th { background: var(--color-surface-strong); font-weight: 700; color: #f0fff5; }
.data-table tr:last-child td { border-bottom: none; }

/* FORM */
.form-group { margin-bottom: 1.2rem; }
.form-label { display: block; font-weight: 600; margin-bottom: .5rem; color: var(--color-text); font-size: var(--fs-small); }
.form-input {
  width: 100%; padding: 12px 16px; background: var(--color-bg-soft); border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm); color: var(--color-text); font-size: 1rem; font-family: inherit;
  transition: border-color var(--motion-fast), box-shadow var(--motion-fast);
}
.form-input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(34,197,94,.15); outline: none; }
.form-hint { font-size: var(--fs-small); color: var(--color-text-muted); margin-top: .4rem; }
.auth-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-lg); align-items: start; }

/* NOTICE */
.notice-box { padding: 1.2rem 1.5rem; border-radius: var(--radius-md); background: rgba(34,197,94,.08); border: 1px solid var(--color-border); margin: 1.5rem 0; }
.notice-box.warning { background: rgba(245,158,11,.08); border-color: rgba(245,158,11,.25); }

/* PROSE */
.prose { max-width: var(--container-narrow); }
.prose h2 { margin-top: 2.5rem; }
.prose p { line-height: 1.9; }
.prose ul, .prose ol { padding-left: 1.5rem; margin: 1rem 0; }
.prose li { margin-bottom: .5rem; line-height: 1.8; }

/* STEP LIST */
.step-list { display: grid; gap: var(--gap-md); }
.step-list .card-glass { display: grid; grid-template-columns: auto 1fr; gap: 1rem; align-items: start; }

/* DIVIDER */
.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--color-border-strong), transparent); margin: 2rem 0; }

/* FOOTER */
.site-footer { background: var(--color-footer-bg); border-top: 1px solid rgba(255,255,255,.06); padding: clamp(2.5rem,4vw,4rem) 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--gap-lg); }
.footer-brand img { height: 42px; width: auto; margin-bottom: 1rem; }
.footer-desc { color: var(--color-footer-text); font-size: var(--fs-small); line-height: 1.7; margin-bottom: .8rem; }
.footer-contact { color: var(--color-text-muted); font-size: var(--fs-small); }
.footer-links-group { display: flex; flex-direction: column; gap: 8px; }
.footer-links-group h4 { color: #c8f0d5; font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.footer-links-group a { color: var(--color-footer-text); font-size: var(--fs-small); padding: 3px 0; }
.footer-links-group a:hover { color: var(--color-primary); }
.footer-divider { height: 1px; background: linear-gradient(90deg, transparent, rgba(34,197,94,.2), transparent); margin: 2rem 0; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; color: var(--color-text-muted); font-size: var(--fs-small); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .grid-2, .grid-text-img, .grid-img-text, .grid-2-1, .grid-1-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .auth-layout { grid-template-columns: 1fr; }
  .cta-inline { flex-direction: column; text-align: center; }
}
@media (max-width: 640px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 414px) {
  .section { padding: clamp(2rem,4vw,3rem) 0; }
  body { font-size: .95rem; }
}
@media (max-width: 375px) {
  .container { padding: 0 12px; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
}

/* REDUCED MOTION */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

/* PAGE SPECIFIC */
.page-home .home-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap-md); }
.page-policy .policy-toc { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.5rem; margin-bottom: 2rem; }
.page-policy .policy-toc a { display: block; padding: 6px 0; color: var(--color-text-soft); font-size: var(--fs-small); }
.page-policy .policy-toc a:hover { color: var(--color-primary); }
.page-article .article-meta { display: flex; gap: 1rem; color: var(--color-text-muted); font-size: var(--fs-small); margin-bottom: 1.5rem; }

@media (max-width: 640px) {
  .page-home .home-stats { grid-template-columns: repeat(2, 1fr); }
}