/* ==========================================================================
   The Linux Academy Pakistan — design system
   Brand: Pakistan green #01411C · terminal green #22C55E
   ========================================================================== */

:root {
  --brand-dark: #01411C;
  --brand: #0B5B2A;
  --brand-mid: #15803D;
  --accent: #22C55E;
  --accent-soft: #DCFCE7;
  --ink: #0F172A;
  --ink-soft: #475569;
  --line: #E2E8F0;
  --bg: #F8FAF9;
  --card: #FFFFFF;
  --danger: #DC2626;
  --warning: #B45309;
  --warning-bg: #FEF3C7;
  --danger-bg: #FEE2E2;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 4px 14px rgba(15, 23, 42, .05);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}
h1, h2, h3, h4 { line-height: 1.25; color: var(--ink); }
h1 { font-size: 1.9rem; }
a { color: var(--brand-mid); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--accent-soft); padding: .1em .4em; border-radius: 6px; font-size: .95em; }
.muted { color: var(--ink-soft); }
.center { text-align: center; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }
main.container { min-height: 62vh; padding-top: 1.5rem; padding-bottom: 3rem; }

/* Header / nav */
.site-header { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-top: .6rem; padding-bottom: .6rem; }
.brand-logo { height: 46px; display: block; }
.main-nav { display: flex; align-items: center; gap: 1.1rem; flex-wrap: wrap; }
.main-nav a { color: var(--ink); font-weight: 500; }
.main-nav a:hover { color: var(--brand-mid); text-decoration: none; }
.inline-form { display: inline; }

/* Buttons */
.btn {
  display: inline-block; border: 1px solid transparent; border-radius: 9px;
  padding: .5rem 1rem; font-size: .95rem; font-weight: 600; cursor: pointer;
  background: none; text-decoration: none !important; transition: .15s;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); color: #fff; }
.btn-outline { border-color: var(--brand-mid); color: var(--brand-mid); background: #fff; }
.btn-outline:hover { background: var(--accent-soft); }
.btn-ghost { color: var(--ink-soft); }
.btn-ghost:hover { color: var(--danger); }
.btn-lg { padding: .75rem 1.5rem; font-size: 1.05rem; }
.btn-sm { padding: .28rem .7rem; font-size: .85rem; }
.btn-block { display: block; width: 100%; text-align: center; }

/* Cards & grid */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.25rem; box-shadow: var(--shadow); margin-bottom: 1rem;
}
.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } .course-detail { grid-template-columns: 1fr !important; } .hero { grid-template-columns: 1fr !important; } .footer-top { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 600px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } .feature-row { grid-template-columns: 1fr 1fr !important; } }

.section-title { margin: 2rem 0 1rem; font-size: 1.35rem; }
.empty-state { text-align: center; padding: 2.5rem; }

/* Alerts & badges */
.messages { padding-top: 1rem; }
.alert { border-radius: 9px; padding: .7rem 1rem; margin-bottom: .6rem; font-weight: 500; }
.alert-success { background: var(--accent-soft); color: var(--brand-dark); }
.alert-error, .alert-danger { background: var(--danger-bg); color: var(--danger); }
.alert-warning { background: var(--warning-bg); color: var(--warning); }
.alert-info { background: #E0F2FE; color: #075985; }

.badge { display: inline-block; border-radius: 999px; padding: .15rem .65rem; font-size: .78rem; font-weight: 700; }
.badge-success { background: var(--accent-soft); color: var(--brand-dark); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: #E0F2FE; color: #075985; }
.badge-code { background: var(--ink); color: #86EFAC; font-family: ui-monospace, "Cascadia Mono", Menlo, monospace; }
.badge-fundamentals { background: #E0F2FE; color: #075985; }
.badge-intermediate { background: var(--warning-bg); color: var(--warning); }
.badge-advanced { background: #FCE7F3; color: #9D174D; }

/* Tables */
.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: .65rem .9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: #F1F5F9; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-soft); }
tbody tr:last-child td { border-bottom: none; }
.actions-cell { white-space: nowrap; }
.kv-table th { width: 38%; color: var(--ink-soft); font-weight: 600; border-bottom: none; padding-left: 0; }
.kv-table td { border-bottom: none; }

/* Forms */
form label { display: block; font-weight: 600; margin: .8rem 0 .25rem; }
input[type="text"], input[type="email"], input[type="password"], input[type="date"],
input[type="number"], input[type="time"], select, textarea {
  width: 100%; padding: .55rem .75rem; border: 1px solid var(--line); border-radius: 9px;
  font-size: 1rem; background: #fff; color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
form div { margin-bottom: .35rem; }
.helptext { display: block; color: var(--ink-soft); font-size: .82rem; margin-top: .15rem; }
.errorlist { color: var(--danger); margin: .2rem 0; padding-left: 1.1rem; font-size: .88rem; }
.form-row { display: flex; gap: 1rem; } .form-row > div { flex: 1; }
.auth-card { max-width: 460px; margin: 2rem auto; }
.auth-card .btn-block { margin-top: 1.2rem; }
.auth-or { text-align: center; color: var(--muted, #6b7280); margin: 1rem 0 .6rem; font-size: .9rem; }

/* Hero */
.hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 2.5rem; align-items: center; padding: 2.5rem 0 1rem; }
.hero-kicker { font-family: ui-monospace, Menlo, monospace; color: var(--brand-mid); font-weight: 700; margin-bottom: .3rem; }
.hero h1 { font-size: 2.5rem; margin: .2rem 0 .8rem; }
.hero-sub { font-size: 1.1rem; color: var(--ink-soft); max-width: 34rem; }
.hero-actions { display: flex; gap: .8rem; margin-top: 1.4rem; flex-wrap: wrap; }
.hero-terminal { background: #05240F; border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.term-bar { background: #033318; padding: .55rem .8rem; display: flex; gap: .4rem; }
.term-bar span { width: 11px; height: 11px; border-radius: 50%; background: #4ADE80; opacity: .85; }
.term-bar span:nth-child(2) { background: #86EFAC; } .term-bar span:nth-child(3) { background: #DCFCE7; }
.term-body { color: #86EFAC; font-family: ui-monospace, Menlo, monospace; font-size: .86rem; padding: 1rem 1.1rem 1.3rem; margin: 0; white-space: pre-wrap; }

/* Features / tracks / courses */
.feature-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin: 2.5rem 0; }
.feature-icon { font-size: 1.6rem; }
.feature h4 { margin: .4rem 0 .2rem; }
.track-icon { font-size: 1.8rem; }
.track-tagline { font-size: .95rem; font-weight: 400; }
.course-links { list-style: none; padding: 0; margin: .5rem 0 0; }
.course-links li { padding: .2rem 0; border-top: 1px dashed var(--line); }
.course-top { display: flex; justify-content: space-between; align-items: flex-start; gap: .5rem; }
.course-logo { width: 44px; height: 44px; flex-shrink: 0; }
.course-logo-lg { width: 64px; height: 64px; }
.course-card { display: flex; flex-direction: column; color: inherit; }
.catalog-grid { gap: 1.5rem; }
.viewer-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: .4rem 0 .8rem; }
.viewer-head .viewer-title { margin: 0; font-size: 1.4rem; }
.viewer-frame { width: 100%; height: calc(100vh - 240px); min-height: 480px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.viewer-hint { margin-top: .5rem; font-size: .85rem; }
.catalog-grid .course-card { padding: 1.75rem; }
.catalog-grid .course-logo { width: 56px; height: 56px; }
.course-card:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-2px); }
.course-card h3 { margin: .5rem 0 .3rem; }
.course-head { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.course-meta { display: flex; justify-content: space-between; margin-top: auto; padding-top: .7rem; font-weight: 600; }
.course-meta .price { color: var(--brand-mid); }

/* Course detail */
.course-detail { display: grid; grid-template-columns: 1.7fr 1fr; gap: 2rem; }
.breadcrumb { margin: .3rem 0 1rem; color: var(--ink-soft); font-size: .9rem; }
.module-card h4 { margin: 0 0 .4rem; }
.module-card ul { margin: 0; padding-left: 1.2rem; }
.price-card { text-align: center; }
.price-big { font-size: 1.9rem; font-weight: 800; color: var(--brand-dark); }
.batch-card .seats-note { font-size: .85rem; color: var(--brand-mid); font-weight: 600; margin: .5rem 0; }
.batch-card form { margin-top: .5rem; }

/* Counter */
.counter-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.search-bar { display: flex; gap: .6rem; margin: 1.2rem 0 1.6rem; }
.search-bar input { flex: 1; font-size: 1.05rem; padding: .7rem 1rem; }
.pay-action { border: 2px solid var(--accent); }
.stat-card { text-align: center; max-width: 340px; }
.stat-value { font-size: 2rem; font-weight: 800; color: var(--brand-dark); }
.stat-label { text-transform: uppercase; font-size: .8rem; letter-spacing: .05em; color: var(--ink-soft); }

/* LMS */
.material-card { display: flex; justify-content: space-between; align-items: center; padding: .8rem 1.1rem; }
.attendance-list { list-style: none; padding: 0; }
.attendance-list li { padding: .35rem 0; border-bottom: 1px dashed var(--line); }
.attendance-table input[type="checkbox"] { width: 1.2rem; height: 1.2rem; }

/* Footer */
.site-footer { background: var(--brand-dark); color: #DCFCE7; margin-top: 3rem; }
.footer-top { display: grid; grid-template-columns: 1.9fr 1fr 1fr 1.3fr; gap: 1.6rem 2rem; padding: 2.4rem 1.25rem 1.8rem; }
.footer-brand strong { font-size: 1.05rem; }
.footer-addr { margin: .55rem 0 .1rem; font-size: .9rem; line-height: 1.55; opacity: .85; }
.footer-contact { margin: .2rem 0 .55rem; font-size: .9rem; line-height: 1.7; }
.footer-nav { display: flex; flex-direction: column; gap: .4rem; }
.footer-h { text-transform: uppercase; letter-spacing: .08em; font-size: .72rem; opacity: .55; margin-bottom: .25rem; }
.site-footer a { color: #DCFCE7; opacity: .85; text-decoration: none; }
.site-footer a:hover { opacity: 1; text-decoration: underline; }
.parent-org { display: inline-block; margin-top: .3rem; font-size: .8rem; opacity: .7; letter-spacing: .03em; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
  gap: .4rem 1.5rem; padding: 1rem 1.25rem 1.4rem; border-top: 1px solid rgba(220, 252, 231, .14);
  font-size: .82rem; opacity: .85; }
.footer-note { font-family: ui-monospace, Menlo, monospace; }

/* ==========================================================================
   Pay slip / receipt (screen + print)
   ========================================================================== */
.print-page { background: #EEF2F0; }
.print-toolbar { max-width: 720px; margin: 1rem auto 0; padding: 0 1rem; display: flex; justify-content: space-between; }
.slip {
  max-width: 720px; margin: 1rem auto 3rem; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 2rem 2.4rem; box-shadow: var(--shadow);
}
.slip-header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; border-bottom: 3px solid var(--brand-dark); padding-bottom: 1rem; }
.slip-logo { height: 56px; }
.slip-org { text-align: right; font-size: .88rem; color: var(--ink-soft); }
.slip-title { text-align: center; letter-spacing: .35em; font-size: 1.15rem; margin: 1.4rem 0 .8rem; color: var(--brand-dark); }
.slip-ref { text-align: center; background: var(--accent-soft); border-radius: 10px; padding: .8rem; margin-bottom: 1.4rem; }
.ref-no { font-family: ui-monospace, Menlo, monospace; font-size: 1.7rem; font-weight: 800; color: var(--brand-dark); letter-spacing: .06em; }
.slip-table { width: 100%; }
.slip-table th { width: 34%; color: var(--ink-soft); font-weight: 600; }
.slip-amount td, .slip-amount th { font-size: 1.1rem; background: #F8FAF9; }
.slip-note { border-left: 4px solid var(--accent); padding: .5rem .9rem; background: #F8FAF9; font-size: .92rem; }
.slip-status-paid { text-align: center; color: var(--brand-mid); border: 3px double var(--brand-mid); border-radius: 10px; font-weight: 800; letter-spacing: .2em; padding: .5rem; margin: 1.2rem auto; max-width: 340px; }
.slip-signature { display: flex; justify-content: space-between; gap: 3rem; margin-top: 3.2rem; }
.sign-line { flex: 1; border-top: 1px solid var(--ink); padding-top: .35rem; text-align: center; font-size: .85rem; color: var(--ink-soft); }
.slip-generated { text-align: center; font-size: .8rem; margin-top: 1.4rem; }

/* ---------- Blog ---------- */
.blog-hero { padding: 1.5rem 0 .5rem; max-width: 760px; }
.blog-hero h1 { font-size: 2rem; margin: .3rem 0 .6rem; }
.lead { font-size: 1.08rem; }
.blog-filters { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.2rem 0 1.6rem; }
.chip { border: 1px solid var(--line); background: #fff; color: var(--ink-soft);
  padding: .35rem .85rem; border-radius: 999px; font-size: .88rem; font-weight: 500; }
.chip:hover { border-color: var(--brand-mid); color: var(--brand-mid); text-decoration: none; }
.chip-active { background: var(--brand); border-color: var(--brand); color: #fff; }
.blog-grid { margin-top: .5rem; }
.blog-card { display: flex; flex-direction: column; gap: .5rem; }
.blog-card h3, .blog-card h4 { margin: 0; }
.blog-card-top { display: flex; align-items: center; justify-content: space-between; }
.blog-emoji { font-size: 1.8rem; line-height: 1; }
.clamp { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- Article (long-form prose) ---------- */
.article { max-width: 760px; margin: 0 auto; }
.article-back { margin: .5rem 0 1rem; }
.article-header { border-bottom: 1px solid var(--line); padding-bottom: 1.2rem; margin-bottom: 1.6rem; }
.article-header h1 { font-size: 2.1rem; margin: .6rem 0 .5rem; }
.article-meta { font-size: .9rem; margin: 0 0 .8rem; }
.prose { font-size: 1.04rem; line-height: 1.72; color: var(--ink); }
.prose h2 { font-size: 1.5rem; margin: 2rem 0 .8rem; padding-top: .4rem; }
.prose h3 { font-size: 1.2rem; margin: 1.6rem 0 .6rem; }
.prose p { margin: 0 0 1.05rem; }
.prose ul, .prose ol { margin: 0 0 1.05rem; padding-left: 1.4rem; }
.prose li { margin: .35rem 0; }
.prose a { color: var(--brand-mid); text-decoration: underline; }
.prose img { max-width: 100%; border-radius: var(--radius); }
.prose code { background: var(--accent-soft); padding: .12em .4em; border-radius: 6px; font-size: .92em; }
.prose pre { background: #0F172A; color: #E2E8F0; padding: 1rem 1.1rem; border-radius: var(--radius);
  overflow-x: auto; font-size: .9rem; line-height: 1.5; margin: 0 0 1.2rem; }
.prose pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.prose blockquote { border-left: 4px solid var(--accent); background: #F8FAF9; margin: 0 0 1.2rem;
  padding: .6rem 1rem; color: var(--ink-soft); }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 1.2rem; font-size: .95rem; }
.prose th, .prose td { border: 1px solid var(--line); padding: .5rem .7rem; text-align: left; }
.prose th { background: #F1F5F9; }
.article-cta { background: var(--accent-soft); border: 1px solid var(--accent); border-radius: var(--radius);
  padding: 1.4rem 1.5rem; margin: 2.2rem 0; }
.article-cta h3 { margin: 0 0 .5rem; }
.article-cta p { margin: 0 0 1rem; color: var(--ink); }
.article-related { margin-top: 2.5rem; }

/* ---------- Social share bar ---------- */
.share { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin: 1.2rem 0; }
.share-label { font-weight: 600; color: var(--ink-soft); font-size: .9rem; }
.share-btn { display: inline-flex; align-items: center; gap: .35rem; padding: .38rem .8rem;
  border-radius: 999px; font-size: .85rem; font-weight: 600; color: #fff; border: 1px solid transparent;
  cursor: pointer; line-height: 1; text-decoration: none; }
.share-btn:hover { opacity: .9; text-decoration: none; color: #fff; }
.share-linkedin { background: #0A66C2; }
.share-facebook { background: #1877F2; }
.share-x        { background: #14171A; }
.share-whatsapp { background: #25D366; }
.share-copy { background: #fff; color: var(--ink); border-color: var(--line); }
.share-copy:hover { color: var(--ink); background: var(--bg); }
.share-copy.copied { background: var(--accent-soft); border-color: var(--accent); color: var(--brand-dark); }

@media print {
  .no-print, .site-header, .site-footer, .messages, .share { display: none !important; }
  body, .print-page { background: #fff; }
  .slip { border: none; box-shadow: none; margin: 0 auto; max-width: 100%; padding: 0; }
  a { color: inherit; }
}