/* ============================================================
   LearnApptainer.com — style.css v1
   Design system: identical to LearnSlurm with --accent:#7b68ee
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=JetBrains+Mono:wght@400;500&family=Outfit:wght@300;400;500;600&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
  --bg0:    #050708;
  --bg1:    #080b10;
  --bg2:    #0d1117;
  --bg3:    #131920;
  --bg4:    #1a2332;
  --bd1:    #1e2d3d;
  --bd2:    #2a3f55;
  --bd3:    #3a5570;
  --accent: #7b68ee;
  --accentg:#6a57d4;
  --green:  #4caf82;
  --red:    #e05c5c;
  --amber:  #e0a050;
  --tx1:    #d6e4f0;
  --tx2:    #8aabca;
  --tx3:    #4a6880;
  --fm:     'JetBrains Mono', 'Courier New', monospace;
  --fd:     'DM Serif Display', Georgia, serif;
  --fu:     'Outfit', system-ui, sans-serif;
  --nav-h:  52px;
}

body { font-family: var(--fu); background: var(--bg0); color: var(--tx1); overflow-x: hidden; }

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg1); }
::-webkit-scrollbar-thumb { background: var(--bd3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 200; background: rgba(5,7,8,0.96); border-bottom: 1px solid var(--bd1); height: var(--nav-h); }
.nav-inner { max-width: 1600px; margin: 0 auto; padding: 0 20px; height: 100%; display: flex; align-items: center; gap: 20px; }
.nav-logo { display: flex; align-items: baseline; gap: 1px; text-decoration: none; flex-shrink: 0; }
.nav-logo-learn { font-family: var(--fu); font-weight: 300; font-size: 14px; color: var(--tx2); letter-spacing: .04em; }
.nav-logo-app   { font-family: var(--fd); font-size: 19px; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 2px; list-style: none; flex: 1; }
.nav-links a { font-size: 13px; color: var(--tx2); text-decoration: none; padding: 5px 10px; border-radius: 4px; transition: .15s; white-space: nowrap; }
.nav-links a:hover, .nav-links a.active { color: var(--tx1); background: var(--bg3); }
.nav-toggle { display: none; background: none; border: none; color: var(--tx2); font-size: 18px; cursor: pointer; padding: 4px; }
.nav-right { margin-left: auto; flex-shrink: 0; }
.cluster-badge { font-family: var(--fm); font-size: 11px; color: var(--tx3); background: var(--bg2); border: 1px solid var(--bd1); padding: 4px 10px; border-radius: 20px; white-space: nowrap; }

body.trainer-body { overflow: hidden; height: 100vh; }
.trainer-wrap { position: fixed; top: var(--nav-h); left: 0; right: 0; bottom: 0; display: flex; flex-direction: row; overflow: hidden; }
.terminal-panel { flex: 1; display: flex; flex-direction: column; overflow: hidden; border-right: 1px solid var(--bd1); min-width: 0; }
.term-titlebar { display: flex; align-items: center; gap: 10px; padding: 0 14px; background: var(--bg3); border-bottom: 1px solid var(--bd1); flex-shrink: 0; height: 36px; }
.term-dots { display: flex; gap: 6px; flex-shrink: 0; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot.red{background:#ff5f57} .dot.yellow{background:#febc2e} .dot.green{background:#28c840}
.term-title { font-family: var(--fm); font-size: 11px; color: var(--tx3); }
.terminal-output { flex: 1; min-height: 0; overflow-y: auto; overflow-x: hidden; padding: 14px 18px 10px; font-family: var(--fm); font-size: 0.82rem; line-height: 1.6; background: var(--bg1); cursor: text; }
.terminal-output > div { white-space: pre-wrap; word-break: break-all; margin-bottom: 1px; }
.term-input { position: fixed; top: -9999px; left: -9999px; width: 1px; height: 1px; opacity: 0; border: none; outline: none; background: transparent; color: transparent; font-family: var(--fm); font-size: 0.82rem; }

.ls-head    { color: var(--accent) !important; font-weight: 500; }
.ls-success { color: var(--green)  !important; }
.ls-warn    { color: var(--amber)  !important; }
.ls-error   { color: var(--red)    !important; }
.ls-info    { color: var(--accent) !important; }
.ls-comment { color: var(--tx3)    !important; }
.ls-out     { color: var(--tx2)    !important; }

.sidebar { width: 290px; flex-shrink: 0; display: flex; flex-direction: column; overflow: hidden; background: var(--bg2); }
.sidebar-tabs { display: flex; border-bottom: 1px solid var(--bd1); flex-shrink: 0; height: 38px; }
.stab { flex: 1; font-family: var(--fu); font-size: 12px; color: var(--tx3); background: none; border: none; border-bottom: 2px solid transparent; padding: 0 8px; cursor: pointer; transition: .15s; }
.stab.active { color: var(--accent); border-bottom-color: var(--accent); }
.stab:hover:not(.active) { color: var(--tx2); }
.spanel { flex: 1; overflow-y: auto; overflow-x: hidden; display: none; flex-direction: column; min-height: 0; }
.spanel.active { display: flex; }

.img-header { font-family: var(--fm); font-size: 10px; color: var(--tx3); letter-spacing: .08em; text-transform: uppercase; padding: 10px 12px 8px; border-bottom: 1px solid var(--bd1); flex-shrink: 0; background: var(--bg2); }
.img-row { display: flex; align-items: center; gap: 8px; padding: 6px 12px; border-bottom: 1px solid rgba(255,255,255,.025); cursor: default; transition: background .1s; }
.img-row:hover { background: var(--bg3); }
.img-name { font-family: var(--fm); font-size: 11px; color: var(--tx1); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.img-size { font-family: var(--fm); font-size: 10px; color: var(--tx3); }
.img-type { font-family: var(--fm); font-size: 9px; color: var(--accent); background: var(--bg3); padding: 1px 5px; border-radius: 3px; text-transform: uppercase; }
.img-empty { padding: 20px 12px; text-align: center; color: var(--tx3); font-size: 12px; font-family: var(--fm); }
#img-body { flex: 1; overflow-y: auto; }

.search-wrap { position: relative; padding: 10px; border-bottom: 1px solid var(--bd1); flex-shrink: 0; background: var(--bg2); }
.cmd-search-input { width: 100%; background: var(--bg3); border: 1px solid var(--bd2); color: var(--tx1); font-family: var(--fm); font-size: 12px; padding: 7px 30px 7px 10px; border-radius: 5px; outline: none; transition: border-color .15s; }
.cmd-search-input:focus { border-color: var(--accent); }
.cmd-search-input::placeholder { color: var(--tx3); }
.search-icon { position: absolute; right: 18px; top: 50%; transform: translateY(-45%); color: var(--tx3); font-size: 14px; pointer-events: none; }
#search-results { flex: 1; overflow-y: auto; }
.sr-hint { font-size: 11px; color: var(--tx3); padding: 8px 12px 4px; font-family: var(--fm); }
.sr-count { font-family: var(--fm); font-size: 10px; color: var(--tx3); padding: 6px 12px; letter-spacing: .05em; }
.sr-empty { font-size: 12px; color: var(--tx3); padding: 16px 12px; font-family: var(--fm); }
.sr-cat { display: flex; align-items: center; gap: 6px; padding: 7px 12px; cursor: pointer; font-family: var(--fu); font-size: 12px; font-weight: 500; color: var(--tx2); border-bottom: 1px solid var(--bd1); transition: background .1s; user-select: none; }
.sr-cat:hover { background: var(--bg3); }
.sr-cat-label { flex: 1; }
.sr-cat-count { font-family: var(--fm); font-size: 10px; color: var(--tx3); background: var(--bg3); padding: 1px 5px; border-radius: 10px; }
.sr-cat-arrow { color: var(--tx3); font-size: 11px; }
.sr-item { padding: 7px 12px; border-bottom: 1px solid rgba(255,255,255,.025); cursor: pointer; transition: background .1s; display: block; }
.sr-item:hover { background: var(--bg4); }
.sr-item-top { display: flex; align-items: baseline; gap: 6px; margin-bottom: 2px; }
.sr-cmd { font-family: var(--fm); font-size: 11px; color: var(--accent); display: inline; white-space: nowrap; }
.sr-cat-tag { font-family: var(--fm); font-size: 9px; color: var(--tx3); background: var(--bg3); padding: 1px 5px; border-radius: 3px; flex-shrink: 0; text-transform: uppercase; letter-spacing: .04em; }
.sr-desc { font-size: 11px; color: var(--tx3); font-family: var(--fu); line-height: 1.35; display: block; padding-top: 2px; }

#toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 999; display: flex; flex-direction: column; gap: 6px; }
.toast { background: var(--bg3); border: 1px solid var(--accent); color: var(--accent); padding: 6px 14px; border-radius: 5px; font-size: 12px; font-family: var(--fm); animation: fadeIn .2s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; } }

.page { padding-top: var(--nav-h); min-height: 100vh; }
.hero { position: relative; min-height: 86vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: radial-gradient(ellipse 80% 50% at 60% 40%, rgba(123,104,238,0.08) 0%, transparent 70%), radial-gradient(ellipse 40% 60% at 10% 80%, rgba(106,87,212,0.04) 0%, transparent 60%), linear-gradient(180deg, var(--bg0) 0%, var(--bg1) 100%); }
.hero-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(123,104,238,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(123,104,238,0.04) 1px, transparent 1px); background-size: 60px 60px; mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent); }
.hero-inner { position: relative; max-width: 1400px; margin: 0 auto; padding: 80px 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; width: 100%; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 8px; font-family: var(--fm); font-size: 11px; color: var(--accent); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 20px; }
.hero-eyebrow::before { content: ''; display: block; width: 24px; height: 1px; background: var(--accent); }
.hero-title { font-family: var(--fd); font-size: clamp(40px, 5vw, 64px); line-height: 1.1; margin-bottom: 8px; }
.hero-title em { font-style: italic; color: var(--accent); }
.hero-subtitle { font-size: 16px; font-weight: 300; color: var(--tx2); max-width: 440px; line-height: 1.7; margin-bottom: 36px; margin-top: 16px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-primary { display: inline-flex; align-items: center; gap: 8px; font-family: var(--fm); font-size: 13px; font-weight: 500; background: var(--accent); color: #fff; border: none; padding: 11px 22px; border-radius: 5px; cursor: pointer; text-decoration: none; transition: .2s; }
.btn-primary:hover { background: var(--accentg); box-shadow: 0 0 20px rgba(123,104,238,0.4); transform: translateY(-1px); }
.btn-secondary { display: inline-flex; align-items: center; gap: 8px; font-family: var(--fm); font-size: 13px; background: transparent; color: var(--tx2); border: 1px solid var(--bd2); padding: 11px 22px; border-radius: 5px; cursor: pointer; text-decoration: none; transition: .2s; }
.btn-secondary:hover { color: var(--tx1); border-color: var(--bd3); background: var(--bg3); }

.hero-terminal { background: var(--bg2); border: 1px solid var(--bd2); border-radius: 10px; box-shadow: 0 4px 24px rgba(0,0,0,0.4), 0 0 20px rgba(123,104,238,0.1); overflow: hidden; font-family: var(--fm); font-size: 13px; }
.terminal-titlebar { display: flex; align-items: center; gap: 8px; padding: 10px 14px; background: var(--bg3); border-bottom: 1px solid var(--bd1); }
.terminal-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.terminal-dot.red{background:#ff5f57} .terminal-dot.yellow{background:#febc2e} .terminal-dot.green{background:#28c840}
.terminal-title { font-size: 11px; color: var(--tx3); margin-left: 6px; }
.terminal-body { padding: 18px; min-height: 280px; }
.t-line { margin-bottom: 3px; line-height: 1.5; font-size: 13px; }
.t-prompt{color:var(--accent)} .t-cmd{color:var(--tx1)} .t-head{color:var(--accent);font-weight:500;font-size:12px} .t-run{color:var(--green);font-size:12px}
.t-cursor { display: inline-block; width: 8px; height: 14px; background: var(--accent); vertical-align: middle; animation: blink 1.1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.stats-bar { border-top: 1px solid var(--bd1); border-bottom: 1px solid var(--bd1); background: var(--bg2); padding: 20px 0; }
.stats-inner { max-width: 1400px; margin: 0 auto; padding: 0 24px; display: flex; }
.stat-item { flex: 1; text-align: center; padding: 0 16px; border-right: 1px solid var(--bd1); }
.stat-item:last-child { border-right: none; }
.stat-value { font-family: var(--fd); font-size: 30px; color: var(--accent); line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 11px; color: var(--tx3); letter-spacing: .06em; text-transform: uppercase; }

.section { max-width: 1400px; margin: 0 auto; padding: 72px 24px; }
.section-label { display: inline-flex; align-items: center; gap: 8px; font-family: var(--fm); font-size: 11px; color: var(--accent); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 12px; }
.section-label::before { content: ''; display: block; width: 16px; height: 1px; background: var(--accent); }
.section-title { font-family: var(--fd); font-size: clamp(26px, 3vw, 38px); color: var(--tx1); line-height: 1.2; }
.section-title em { font-style: italic; color: var(--accent); }
.section-desc { font-size: 15px; color: var(--tx2); max-width: 540px; margin-top: 12px; line-height: 1.7; font-weight: 300; }
.section-header { margin-bottom: 44px; }

.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--bd1); border: 1px solid var(--bd1); border-radius: 10px; overflow: hidden; }
.feature-card { background: var(--bg2); padding: 28px; transition: background .2s; }
.feature-card:hover { background: var(--bg4); }
.feature-icon { width: 38px; height: 38px; border-radius: 5px; background: var(--bg3); border: 1px solid var(--bd2); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; font-size: 17px; }
.feature-title { font-family: var(--fd); font-size: 19px; color: var(--tx1); margin-bottom: 8px; }
.feature-desc { font-size: 13px; color: var(--tx2); line-height: 1.65; font-weight: 300; }

.commands-section { background: var(--bg2); border-top: 1px solid var(--bd1); border-bottom: 1px solid var(--bd1); }
.commands-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cmd-group { background: var(--bg0); border: 1px solid var(--bd1); border-radius: 8px; padding: 18px; }
.cmd-group-title { font-family: var(--fm); font-size: 10px; color: var(--accent); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--bd1); }
.cmd-list { list-style: none; display: flex; flex-direction: column; gap: 5px; }
.cmd-list li { font-family: var(--fm); font-size: 12px; color: var(--accent); padding: 4px 7px; background: var(--bg3); border-radius: 4px; }

.chain-section { background: var(--bg1); border-top: 1px solid var(--bd1); border-bottom: 1px solid var(--bd1); padding: 48px 0; }
.chain-inner { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
.chain-steps { display: flex; align-items: stretch; gap: 0; margin-top: 32px; }
.chain-step { flex: 1; background: var(--bg2); border: 1px solid var(--bd1); padding: 24px 20px; position: relative; text-decoration: none; transition: border-color .2s; }
.chain-step:hover { border-color: var(--accent); }
.chain-step.current { border-color: var(--accent); background: var(--bg3); }
.chain-step + .chain-step { border-left: none; }
.chain-step:first-child { border-radius: 8px 0 0 8px; }
.chain-step:last-child  { border-radius: 0 8px 8px 0; }
.chain-num  { font-family: var(--fm); font-size: 10px; color: var(--tx3); letter-spacing: .08em; margin-bottom: 8px; }
.chain-name { font-family: var(--fd); font-size: 18px; color: var(--tx1); margin-bottom: 6px; }
.chain-name.cur { color: var(--accent); }
.chain-desc { font-size: 12px; color: var(--tx3); line-height: 1.5; }
.chain-arrow { position: absolute; right: -14px; top: 50%; transform: translateY(-50%); z-index: 2; font-family: var(--fm); font-size: 18px; color: var(--tx3); }

.footer { border-top: 1px solid var(--bd1); padding: 32px 0; margin-top: 0; }
.footer-inner { max-width: 1400px; margin: 0 auto; padding: 0 24px; display: flex; flex-direction: column; gap: 16px; }
.footer-logo { font-family: var(--fd); font-size: 17px; color: var(--accent); text-decoration: none; }
.footer-text { font-size: 12px; color: var(--tx3); }
.footer-divider { border: none; border-top: 1px solid var(--bd1); margin: 4px 0; }
.footer-links { display: flex; gap: 18px; list-style: none; flex-wrap: wrap; align-items: center; }
.footer-links a { font-size: 12px; color: var(--tx3); text-decoration: none; transition: color .2s; }
.footer-links a:hover { color: var(--tx2); }
.footer-hub-label { font-family: var(--fm); font-size: 10px; color: var(--tx3); letter-spacing: .1em; text-transform: uppercase; }
.footer-copyright { font-size: 11px; color: var(--tx3); }

/* ── What's Next section ─────────────────────────────────── */
.whats-next { padding: 64px 0; border-top: 1px solid var(--bd1); }
.whats-next-inner { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
.whats-next-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 36px; }
.next-card {
  display: block; text-decoration: none;
  background: var(--bg2); border: 1px solid var(--bd1); border-radius: 10px;
  padding: 28px; transition: border-color .2s, background .2s;
}
.next-card:hover { border-color: var(--accent); background: var(--bg3); }
.next-card-icon { font-size: 28px; margin-bottom: 14px; }
.next-card-title { font-family: var(--fd); font-size: 22px; color: var(--tx1); margin-bottom: 10px; }
.next-card-desc { font-size: 13px; color: var(--tx2); line-height: 1.65; font-weight: 300; margin-bottom: 16px; }
.next-card-link { font-family: var(--fm); font-size: 12px; color: var(--accent); }
@media (max-width: 768px) { .whats-next-cards { grid-template-columns: 1fr; } }

.about-wrap { max-width: 740px; margin: 0 auto; padding: 60px 32px 80px; }
.about-wrap h1 { font-family: var(--fd); font-size: clamp(28px, 4vw, 44px); margin-bottom: 20px; line-height: 1.15; }
.about-wrap h1 em { font-style: italic; color: var(--accent); }
.about-wrap p { font-size: 15px; color: var(--tx2); line-height: 1.8; margin-bottom: 18px; font-weight: 300; }
.about-wrap h2 { font-family: var(--fd); font-size: 22px; color: var(--tx1); margin: 36px 0 12px; }
.about-wrap a { color: var(--accent); text-decoration: none; }
.about-wrap a:hover { text-decoration: underline; }
.about-wrap .back-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 40px; font-family: var(--fm); font-size: 13px; color: var(--tx2); text-decoration: none; transition: color .15s; }
.about-wrap .back-link:hover { color: var(--accent); text-decoration: none; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 13px; margin: 12px 0 20px; }
.spec-table td { padding: 8px 0; border-bottom: 1px solid var(--bd1); color: var(--tx2); }
.spec-table td:first-child { color: var(--accent); font-family: var(--fm); font-size: 12px; width: 40%; }


/* ── HPC Learning Hub strip ─────────────────────────────── */
.hub-strip {
  background: var(--bg2); border-top: 1px solid var(--bd1);
  padding: 10px 0; text-align: center;
}
.hub-inner {
  max-width: 1400px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: center;
  gap: 20px; flex-wrap: wrap;
}
.hub-label { font-size: 12px; color: var(--tx3); font-family: var(--fu); }
.hub-label strong { color: var(--tx2); }
.hub-links { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.hub-links a { font-size: 12px; color: var(--tx3); text-decoration: none; font-family: var(--fm); transition: color .15s; }
.hub-links a:hover { color: var(--accent); }
.hub-links a.hub-current { color: var(--accent); }
.hub-sep { color: var(--bd2); font-size: 12px; }

@media (max-width: 1100px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-terminal { max-width: 520px; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .commands-grid { grid-template-columns: repeat(2, 1fr); }
  .chain-steps { flex-direction: column; }
  .chain-step + .chain-step { border-left: 1px solid var(--bd1); border-top: none; }
  .chain-step:first-child { border-radius: 8px 8px 0 0; }
  .chain-step:last-child  { border-radius: 0 0 8px 8px; }
  .chain-arrow { display: none; }
}
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0; background: rgba(5,7,8,0.98); border-bottom: 1px solid var(--bd1); padding: 8px; z-index: 300; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-right { display: none; }
  .sidebar { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .commands-grid { grid-template-columns: 1fr 1fr; }
  .stats-inner { flex-wrap: wrap; }
  .stat-item { flex: 1 1 50%; border-right: none; border-bottom: 1px solid var(--bd1); padding: 12px; }
  .about-wrap { padding: 40px 20px 60px; }
}