/* Science Porter Bangladesh — design system (no build step) */
:root {
  --bg: #F7F4EF;
  --surface: #FFFFFF;
  --ink: #1A1F2E;
  --muted: #5C6578;
  --accent: #0B6E4F;
  --accent-hover: #085A41;
  --accent-2: #C45C26;
  --highlight: #E8F1FF;
  --border: #E2DCD3;
  --header-bg: rgba(247, 244, 239, 0.85);
  --shadow: 0 10px 30px rgba(26, 31, 46, 0.08);
  --radius: 14px;
  --radius-sm: 8px;
  --max: 1120px;
  --narrow: 720px;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-bn: "Hind Siliguri", "Noto Sans Bengali", var(--font-sans);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --focus: 0 0 0 3px rgba(11, 110, 79, 0.35);
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0F1419;
  --surface: #171D25;
  --ink: #E8EAED;
  --muted: #9AA3B2;
  --accent: #3DDC97;
  --accent-hover: #6AE7B0;
  --accent-2: #E08A5A;
  --highlight: #1A2433;
  --border: #2A3340;
  --header-bg: rgba(15, 20, 25, 0.85);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --focus: 0 0 0 3px rgba(61, 220, 151, 0.4);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
html[lang="bn"] body,
html[lang="bn"] .prose,
:lang(bn) { font-family: var(--font-bn); }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: 4px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--space-4); top: -100px; z-index: 1000;
  background: var(--accent); color: #fff; padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm); font-weight: 600;
}
.skip-link:focus { top: var(--space-4); color: #fff; }

.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }
.narrow { width: min(100% - 2rem, var(--narrow)); }
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-7); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: saturate(1.2) blur(12px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: var(--space-4);
  min-height: 4.25rem; padding-block: var(--space-2);
}
.brand { display: flex; align-items: center; gap: var(--space-3); color: inherit; text-decoration: none; min-width: 0; }
.brand:hover { color: inherit; }
.brand-mark { flex: none; }
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-name { font-weight: 700; font-size: 0.95rem; letter-spacing: -0.01em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-tagline { font-size: 0.72rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 18rem; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; gap: 0.15rem; list-style: none; margin: 0; padding: 0; }
.primary-nav a {
  display: block; padding: 0.55rem 0.7rem; color: var(--ink); text-decoration: none;
  font-size: 0.92rem; font-weight: 500; border-radius: 999px;
}
.primary-nav a:hover { background: var(--highlight); color: var(--ink); }
.header-actions { display: flex; align-items: center; gap: var(--space-2); }
.icon-btn {
  appearance: none; border: 0; background: transparent; color: var(--ink);
  width: 42px; height: 42px; border-radius: 999px; display: grid; place-items: center; cursor: pointer;
}
.icon-btn:hover { background: var(--highlight); }
.lang-switch { display: flex; align-items: center; gap: 0.35rem; font-size: 0.85rem; font-weight: 600; }
.lang-switch a { color: var(--muted); text-decoration: none; padding: 0.25rem; }
.lang-switch a.is-active { color: var(--ink); }
.theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
.nav-toggle { display: none; }

@media (max-width: 960px) {
  .brand-tagline { display: none; }
  .nav-toggle { display: grid; }
  .primary-nav {
    position: fixed; inset: 4.25rem 0 auto 0; background: var(--surface);
    border-bottom: 1px solid var(--border); display: none; padding: var(--space-4);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; }
  .primary-nav a { padding: 0.85rem 1rem; }
}

/* Typography */
h1, h2, h3, .hero-title, .story-card-title, .article-header h1 {
  font-family: var(--font-serif);
  letter-spacing: -0.02em;
  line-height: 1.2;
  font-weight: 700;
}
html[lang="bn"] h1,
html[lang="bn"] h2,
html[lang="bn"] h3,
html[lang="bn"] .hero-title,
html[lang="bn"] .story-card-title { font-family: var(--font-bn); }

.kicker {
  text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.75rem;
  font-weight: 700; color: var(--accent); margin: 0 0 var(--space-3);
}
.lede { font-size: 1.2rem; color: var(--muted); max-width: 42rem; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  min-height: 44px; padding: 0.65rem 1.2rem; border-radius: 999px; font-weight: 600;
  text-decoration: none; border: 1px solid transparent; cursor: pointer; font: inherit;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--ink); }
.btn-ghost:hover { background: var(--highlight); color: var(--ink); }
.text-link { font-weight: 600; text-decoration: none; }

/* Hero */
.hero { padding: var(--space-7) 0 var(--space-6); }
.hero-grid {
  display: grid; grid-template-columns: 1.15fr 1fr; gap: var(--space-6); align-items: center;
}
.hero-media {
  border-radius: calc(var(--radius) + 4px); overflow: hidden; box-shadow: var(--shadow);
  aspect-ratio: 16/10; background: var(--surface);
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-title { font-size: clamp(2rem, 4vw, 3rem); margin: 0 0 var(--space-4); }
.hero-title a { color: inherit; text-decoration: none; }
.hero-dek { font-size: 1.15rem; color: var(--muted); margin: 0 0 var(--space-5); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
@media (max-width: 800px) {
  .hero-grid { grid-template-columns: 1fr; }
}

/* Impact */
.impact-strip { padding: var(--space-5) 0; border-block: 1px solid var(--border); background: var(--surface); }
.impact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); text-align: center; }
.impact-value { font-family: var(--font-serif); font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; color: var(--accent); }
.impact-label { color: var(--muted); font-size: 0.92rem; }
@media (max-width: 700px) { .impact-grid { grid-template-columns: repeat(2, 1fr); } }

/* Sections */
.section { padding: var(--space-7) 0; }
.section-muted { background: color-mix(in srgb, var(--surface) 70%, var(--bg)); }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.section-head h2, .section-title-plain { margin: 0 0 var(--space-5); font-size: 1.75rem; }
.page-hero { padding: var(--space-7) 0 var(--space-5); }
.page-hero h1 { font-size: clamp(2rem, 4vw, 2.75rem); margin: 0 0 var(--space-3); }

/* Cards */
.story-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5);
}
@media (max-width: 900px) { .story-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .story-grid { grid-template-columns: 1fr; } }

.story-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column; box-shadow: var(--shadow);
}
.story-card-media { aspect-ratio: 16/9; overflow: hidden; background: var(--highlight); }
.story-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
@media (prefers-reduced-motion: no-preference) {
  .story-card:hover .story-card-media img { transform: scale(1.03); }
}
.story-card-body { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.story-card-title { font-size: 1.2rem; margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.story-card-title a { color: inherit; text-decoration: none; }
.story-card-dek { margin: 0; color: var(--muted); font-size: 0.95rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.story-card-meta { margin: auto 0 0; color: var(--muted); font-size: 0.85rem; display: flex; gap: 0.4rem; flex-wrap: wrap; }

.meta-row { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.badge {
  display: inline-flex; align-items: center; padding: 0.2rem 0.55rem; border-radius: 999px;
  background: var(--highlight); color: var(--ink); font-size: 0.72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.topic-chip, .chip, .topic-pill {
  display: inline-flex; align-items: center; padding: 0.35rem 0.75rem; border-radius: 999px;
  border: 1px solid var(--border); color: var(--ink); text-decoration: none; font-size: 0.85rem; font-weight: 500;
  background: var(--surface);
}
.topic-chip:hover, .chip:hover, .topic-pill:hover { border-color: var(--accent); color: var(--accent); }
.chip.is-active, .topic-pill { border-color: color-mix(in srgb, var(--topic-color, var(--accent)) 50%, var(--border)); }
.filter-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: var(--space-4); }
.topic-rail { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.topic-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
@media (max-width: 700px) { .topic-cards { grid-template-columns: 1fr; } }
.topic-card {
  display: block; padding: var(--space-5); border-radius: var(--radius); background: var(--surface);
  border: 1px solid var(--border); text-decoration: none; color: inherit;
  border-top: 4px solid var(--topic-color, var(--accent));
}
.topic-card h2 { margin: 0 0 var(--space-2); font-size: 1.35rem; }
.topic-card p { margin: 0; color: var(--muted); }

/* People */
.people-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5);
}
.people-grid-lg { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .people-grid, .people-grid-lg { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .people-grid, .people-grid-lg { grid-template-columns: 1fr; } }
.person-card { text-align: center; }
.person-card-link { color: inherit; text-decoration: none; display: grid; gap: var(--space-3); justify-items: center; }
.person-photo {
  width: 140px; height: 140px; border-radius: 28px; object-fit: cover;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.person-name { margin: 0; font-size: 1.15rem; font-family: var(--font-serif); }
.person-role { margin: 0; color: var(--muted); font-size: 0.92rem; }

.profile { padding: var(--space-7) 0; }
.profile-grid { display: grid; grid-template-columns: 240px 1fr; gap: var(--space-6); }
.profile-photo { width: 240px; height: 240px; border-radius: 32px; object-fit: cover; border: 1px solid var(--border); }
.profile-title { font-size: 1.2rem; color: var(--muted); margin-top: 0; }
.profile-affil { color: var(--muted); }
.media-flag {
  display: inline-block; margin-top: var(--space-3); padding: 0.35rem 0.7rem;
  background: color-mix(in srgb, var(--accent) 15%, var(--surface)); color: var(--accent);
  border-radius: 999px; font-size: 0.8rem; font-weight: 700;
}
@media (max-width: 700px) { .profile-grid { grid-template-columns: 1fr; } }

/* Events */
.event-list { display: grid; gap: var(--space-4); }
.event-card {
  display: grid; grid-template-columns: 180px 1fr; gap: var(--space-4);
  padding: var(--space-4); background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius);
}
.event-date { font-weight: 700; color: var(--accent); }
.event-title { margin: 0 0 var(--space-2); font-size: 1.25rem; font-family: var(--font-serif); }
.event-title a { color: inherit; text-decoration: none; }
.event-meta { color: var(--muted); font-size: 0.9rem; }
.event-facts { display: grid; gap: var(--space-3); margin: var(--space-5) 0; }
.event-facts div { display: grid; gap: 0.2rem; }
.event-facts dt { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 700; }
.event-facts dd { margin: 0; }
@media (max-width: 600px) { .event-card { grid-template-columns: 1fr; } }

/* Article */
.article-header { padding-top: var(--space-7); }
.article-header h1 { font-size: clamp(2rem, 4vw, 2.9rem); margin: var(--space-3) 0; }
.article-dek { font-size: 1.25rem; color: var(--muted); }
.article-byline { color: var(--muted); font-size: 0.95rem; }
.article-hero { margin: var(--space-6) auto; width: min(100% - 2rem, 1000px); }
.article-hero img { width: 100%; border-radius: var(--radius); aspect-ratio: 16/9; object-fit: cover; }
.article-hero figcaption { color: var(--muted); font-size: 0.85rem; margin-top: var(--space-2); }
.prose { font-size: 1.08rem; }
.prose > * + * { margin-top: 1.1em; }
.prose h2, .prose h3 { margin-top: 1.8em; font-family: var(--font-serif); }
.prose blockquote {
  margin: 1.5em 0; padding: 1rem 1.25rem; border-left: 4px solid var(--accent);
  background: var(--highlight); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: var(--font-serif); font-size: 1.15rem;
}
.prose code { font-size: 0.9em; background: var(--highlight); padding: 0.1em 0.35em; border-radius: 4px; }
.sources { margin-top: var(--space-7); padding-top: var(--space-5); border-top: 1px solid var(--border); }
.license-note { margin-top: var(--space-5); padding: var(--space-4); background: var(--highlight); border-radius: var(--radius-sm); }
.author-boxes { display: grid; gap: var(--space-4); padding: var(--space-6) 0; }
.author-box {
  display: grid; grid-template-columns: 72px 1fr; gap: var(--space-4);
  padding: var(--space-4); border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface);
}
.author-box img { border-radius: 18px; width: 72px; height: 72px; object-fit: cover; }
.author-box h2 { margin: 0 0 0.25rem; font-size: 1.15rem; }

/* Partners / newsletter / CTAs */
.partners-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.partner-logo {
  display: grid; place-items: center; min-height: 88px; padding: var(--space-4);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  text-decoration: none; color: var(--ink); font-weight: 600; text-align: center;
}
.partners-note { color: var(--muted); font-size: 0.92rem; }
@media (max-width: 700px) { .partners-grid { grid-template-columns: repeat(2, 1fr); } }

.newsletter-cta { background: var(--ink); color: #F7F4EF; }
html[data-theme="dark"] .newsletter-cta { background: #0A0E12; }
.newsletter-cta h2 { color: inherit; margin: 0 0 var(--space-2); }
.newsletter-cta p { color: rgba(247,244,239,0.8); margin: 0; }
.newsletter-inner {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: var(--space-5); align-items: center;
}
.newsletter-form, .search-form, .contact-form { display: grid; gap: var(--space-3); }
.newsletter-form { grid-template-columns: 1fr auto; }
.search-form { grid-template-columns: 1fr auto; }
.newsletter-form input, .search-form input, .contact-form input, .contact-form textarea {
  width: 100%; min-height: 48px; padding: 0.75rem 1rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); color: var(--ink); font: inherit;
}
.contact-form textarea { border-radius: var(--radius); min-height: 160px; resize: vertical; }
.contact-form label { display: grid; gap: 0.35rem; font-weight: 600; font-size: 0.9rem; }
.newsletter-cta .newsletter-form input { border: 0; }
@media (max-width: 700px) {
  .newsletter-inner, .newsletter-form, .search-form { grid-template-columns: 1fr; }
}

.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.action-card {
  display: block; padding: var(--space-5); background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); text-decoration: none; color: inherit; box-shadow: var(--shadow);
}
.action-card h2 { margin: 0 0 var(--space-2); font-size: 1.3rem; }
.action-card p { margin: 0; color: var(--muted); }
@media (max-width: 800px) { .cards-3 { grid-template-columns: 1fr; } }

.subnav { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: var(--space-4); }
.subnav a {
  text-decoration: none; color: var(--ink); padding: 0.45rem 0.8rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); font-size: 0.9rem; font-weight: 500;
}
.cta-row { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr; } }
.notice { padding: var(--space-4); border-radius: var(--radius-sm); }
.notice.success { background: color-mix(in srgb, var(--accent) 18%, var(--surface)); }
.empty { color: var(--muted); }
.pagination { display: flex; gap: 0.4rem; justify-content: center; margin-top: var(--space-6); }
.pagination a {
  width: 40px; height: 40px; display: grid; place-items: center; border-radius: 999px;
  text-decoration: none; color: var(--ink); border: 1px solid var(--border);
}
.pagination a.is-active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: var(--space-7) 0 var(--space-5); background: var(--surface); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--space-5); }
.footer-heading { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.45rem; }
.footer-links a { color: var(--ink); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.footer-independence { color: var(--muted); font-size: 0.9rem; }
.social-list { list-style: none; display: flex; flex-wrap: wrap; gap: 0.75rem; padding: 0; margin: var(--space-4) 0 0; }
.social-list a { font-weight: 600; text-decoration: none; }
.footer-bottom { margin-top: var(--space-6); padding-top: var(--space-4); border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
.brand-footer { margin-bottom: var(--space-3); }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* Admin will load separately; shared form bits */
.admin-body { background: #f3f1ec; }