/* ============================================================
   Zonoth — Containers & Kubernetes Course deck theme
   Dark teal + emerald gradient. Built on reveal.js 5.x
   ============================================================ */

/* ---- self-hosted fonts (offline-safe) ---- */
@font-face { font-family:'Inter'; font-weight:400; font-display:swap; src:url('vendor/fonts/inter-400.woff2') format('woff2'); }
@font-face { font-family:'Inter'; font-weight:500; font-display:swap; src:url('vendor/fonts/inter-500.woff2') format('woff2'); }
@font-face { font-family:'Inter'; font-weight:600; font-display:swap; src:url('vendor/fonts/inter-600.woff2') format('woff2'); }
@font-face { font-family:'Inter'; font-weight:700; font-display:swap; src:url('vendor/fonts/inter-700.woff2') format('woff2'); }
@font-face { font-family:'Inter'; font-weight:800; font-display:swap; src:url('vendor/fonts/inter-800.woff2') format('woff2'); }
@font-face { font-family:'JetBrains Mono'; font-weight:400; font-display:swap; src:url('vendor/fonts/jbmono-400.woff2') format('woff2'); }
@font-face { font-family:'JetBrains Mono'; font-weight:600; font-display:swap; src:url('vendor/fonts/jbmono-600.woff2') format('woff2'); }
/* Sora — headings 30px+ (self-hosted for offline classroom delivery) */
@font-face { font-family:'Sora'; font-weight:400; font-display:swap; src:url('vendor/fonts/sora-400.woff2') format('woff2'); }
@font-face { font-family:'Sora'; font-weight:600; font-display:swap; src:url('vendor/fonts/sora-600.woff2') format('woff2'); }
@font-face { font-family:'Sora'; font-weight:700; font-display:swap; src:url('vendor/fonts/sora-700.woff2') format('woff2'); }
@font-face { font-family:'Sora'; font-weight:800; font-display:swap; src:url('vendor/fonts/sora-800.woff2') format('woff2'); }

:root {
  --z-bg-0: #0e1d22;   /* deepest */
  --z-bg-1: #12242a;   /* base background */
  --z-bg-2: #17313a;   /* panel */
  --z-bg-3: #1d3b45;   /* raised panel */
  --z-border: #2a4a52;
  --z-border-soft: #24424a;
  --z-ink: #eaf3f2;
  --z-ink-soft: #c3d3d5;
  --z-muted: #93a9ae;
  --z-mint: #3ce8a6;
  --z-emerald: #12a85c;
  --z-emerald-deep: #0c8f4d;
  --z-grad: linear-gradient(135deg, #3ce8a6 0%, #10a356 100%);
  --z-grad-soft: linear-gradient(135deg, rgba(60,232,166,.16), rgba(16,163,86,.10));
  --z-amber: #f4b740;
  --z-rose: #ff6b6b;
  --z-code-bg: #0c1a1f;
  --z-font: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --z-font-display: 'Sora', 'Inter', system-ui, sans-serif;
  --z-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, Menlo, monospace;
}

/* ---------- base deck ---------- */
.reveal-viewport {
  background: radial-gradient(1200px 700px at 78% -10%, #17323b 0%, var(--z-bg-1) 42%, var(--z-bg-0) 100%);
}
.reveal {
  font-family: var(--z-font);
  font-size: 30px;
  color: var(--z-ink);
  font-weight: 400;
  letter-spacing: .1px;
}
.reveal .slides { text-align: left; }
.reveal .slides section { height: 100%; top: 0 !important; }

.reveal h1, .reveal h2, .reveal h3, .reveal h4 {
  font-family: var(--z-font-display);
  color: var(--z-ink);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -.8px;
  margin: 0 0 .5em;
  text-transform: none;
}
/* h4 is a sub-label / flow-step / pros-cons title — always Inter, under the 30px floor */
.reveal h4 { font-family: var(--z-font); letter-spacing: -.2px; }
.reveal h1 { font-size: 2.35em; }
.reveal h2 { font-size: 1.5em; }
.reveal h3 { font-size: 1.15em; }
.reveal p { line-height: 1.4; margin: 0 0 .55em; }
.reveal strong { color: #fff; font-weight: 700; }
.reveal em { color: var(--z-mint); font-style: normal; font-weight: 600; }
.reveal a { color: var(--z-mint); text-decoration: none; }
.reveal .muted { color: var(--z-muted); }
.reveal .mint { color: var(--z-mint); }

/* gradient text util */
.z-grad-text {
  background: var(--z-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- section title bar (top of content slides) ---------- */
.z-eyebrow {
  display: inline-flex; align-items: center; gap: .5em;
  font-size: .5em; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--z-mint);
  margin-bottom: .35em;
}
.z-eyebrow::before {
  content: ""; width: 26px; height: 3px; border-radius: 3px; background: var(--z-grad);
}
.reveal h2.z-title { position: relative; padding-bottom: .28em; margin-bottom: .7em; }
.reveal h2.z-title::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 68px; height: 4px; border-radius: 4px; background: var(--z-grad);
}

/* ---------- lists ---------- */
.reveal ul { list-style: none; margin: 0; padding: 0; }
.reveal ul > li {
  position: relative; padding-left: 1.5em; margin: 0 0 .55em;
  line-height: 1.36;
}
.reveal ul > li::before {
  content: ""; position: absolute; left: 0; top: .5em;
  width: .62em; height: .62em; border-radius: 3px;
  background: var(--z-grad); box-shadow: 0 0 12px rgba(60,232,166,.35);
}
.reveal ul ul { margin-top: .4em; }
.reveal ul ul > li { font-size: .9em; color: var(--z-ink-soft); }
.reveal ul ul > li::before {
  background: none; border: 2px solid var(--z-emerald); box-shadow: none;
  width: .5em; height: .5em; top: .48em;
}
.reveal ol { margin-left: 1.1em; }
.reveal ol > li { margin: 0 0 .5em; padding-left: .2em; }
.reveal ol > li::marker { color: var(--z-mint); font-weight: 700; }

/* ---------- cover slide ---------- */
.z-cover { display: flex; flex-direction: column; justify-content: center; height: 100%; }
.z-cover .z-brand { display: flex; align-items: center; gap: .55em; margin-bottom: 1.1em; }
.z-cover .z-brand img { height: 46px; }
.z-cover .z-brand .z-brandtext { font-size: .62em; font-weight: 700; letter-spacing: .3px; }
.z-cover .z-brand .z-brandtext .dim { color: var(--z-muted); font-weight: 500; }
.z-sessionbadge {
  display: inline-flex; align-items: center; gap: .5em; align-self: flex-start;
  background: var(--z-grad-soft); border: 1px solid var(--z-border);
  color: var(--z-mint); font-weight: 700; font-size: .5em; letter-spacing: 2px;
  text-transform: uppercase; padding: .5em 1em; border-radius: 999px; margin-bottom: .7em;
}
.z-cover h1 { font-size: 2.7em; margin-bottom: .2em; }
.z-cover .z-sub { font-size: .92em; color: var(--z-ink-soft); max-width: 20em; margin-bottom: 1.2em; }
.z-agenda-chips { display: flex; flex-wrap: wrap; gap: .5em; max-width: 26em; }
.z-chip {
  font-size: .5em; font-weight: 600; padding: .5em .9em; border-radius: 8px;
  background: var(--z-bg-2); border: 1px solid var(--z-border-soft); color: var(--z-ink-soft);
}
.z-chip.on { background: var(--z-grad); color: #05231a; border-color: transparent; }

/* ---------- section divider ---------- */
.z-divider { display: flex; flex-direction: column; justify-content: center; height: 100%; }
.z-divider .z-secnum {
  font-family: var(--z-mono); font-size: 1.1em; font-weight: 700; color: var(--z-mint);
  letter-spacing: 2px; margin-bottom: .1em;
}
.z-divider h2 { font-size: 2.4em; margin: 0; }
.z-divider .z-secline { width: 90px; height: 5px; border-radius: 5px; background: var(--z-grad); margin-top: .5em; }
.z-divider .z-secsub { color: var(--z-muted); margin-top: .7em; font-size: .8em; max-width: 24em; }

/* ---------- cards / grid ---------- */
.z-grid { display: grid; gap: .8em; }
.z-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.z-grid.cols-3 { grid-template-columns: repeat(3,1fr); }
.z-card {
  background: linear-gradient(180deg, var(--z-bg-2), var(--z-bg-1));
  border: 1px solid var(--z-border-soft); border-radius: 14px;
  padding: .85em 1em; position: relative; overflow: hidden;
}
.z-card .z-cardicon {
  width: 46px; height: 46px; border-radius: 11px; display: flex; align-items: center; justify-content: center;
  background: var(--z-grad-soft); border: 1px solid var(--z-border); margin-bottom: .5em;
}
.z-card .z-cardicon svg { width: 26px; height: 26px; stroke: var(--z-mint); }
.z-card h3 { font-size: 1.02em; margin-bottom: .28em; }
/* 3-up title budget: Sora is wider than Inter, so dense columns drop to 30px to avoid wrap */
.z-grid.cols-3 .z-card h3 { font-size: 1em; }
.z-card p { font-size: .74em; color: var(--z-ink-soft); margin: 0; line-height: 1.34; }
.z-card.accent { border-color: var(--z-emerald); box-shadow: 0 0 0 1px rgba(18,168,92,.25) inset; }

/* stat number */
.z-stat { font-size: 2.2em; font-weight: 800; }
.z-stat .z-grad-text { display: inline; }

/* ---------- callouts ---------- */
.z-callout {
  display: flex; gap: .7em; align-items: flex-start;
  border-radius: 12px; padding: .7em .95em; font-size: .82em; line-height: 1.34;
  border: 1px solid var(--z-border); background: var(--z-bg-2);
}
.z-callout svg { width: 24px; height: 24px; flex: 0 0 24px; margin-top: .05em; }
.z-callout.tip { border-color: rgba(60,232,166,.4); background: rgba(60,232,166,.08); }
.z-callout.tip svg { stroke: var(--z-mint); }
.z-callout.warn { border-color: rgba(244,183,64,.4); background: rgba(244,183,64,.08); }
.z-callout.warn svg { stroke: var(--z-amber); }
.z-callout.info svg { stroke: var(--z-ink-soft); }
.z-callout strong { color: #fff; }

/* ---------- code ---------- */
.reveal pre {
  width: 100%; box-shadow: 0 18px 40px rgba(0,0,0,.35); margin: .2em 0;
  font-size: .6em; border-radius: 12px; border: 1px solid var(--z-border);
  background: var(--z-code-bg); overflow: hidden;
}
.reveal pre::before {
  content: attr(data-lang); display: block; padding: .5em 1em; font-family: var(--z-mono);
  font-size: .8em; color: var(--z-muted); letter-spacing: 1px; text-transform: uppercase;
  border-bottom: 1px solid var(--z-border-soft); background: rgba(255,255,255,.02);
}
.reveal pre code {
  font-family: var(--z-mono); padding: 1em 1.2em; line-height: 1.5; max-height: 560px;
  background: transparent; border-radius: 0;
}
.reveal code:not(pre code) {
  font-family: var(--z-mono); font-size: .82em; color: var(--z-mint);
  background: rgba(60,232,166,.1); padding: .08em .4em; border-radius: 6px;
  border: 1px solid rgba(60,232,166,.18);
}

/* highlight.js token overrides (teal night) */
.hljs { color: #dbe7e5; background: transparent; }
.hljs-keyword, .hljs-built_in { color: #7fd0ff; }
.hljs-string, .hljs-attr { color: #3ce8a6; }
.hljs-title, .hljs-title.function_, .hljs-section { color: #ffd479; }
.hljs-number, .hljs-literal { color: #f4b740; }
.hljs-comment { color: #6d878c; font-style: italic; }
.hljs-type, .hljs-params { color: #c3d3d5; }
.hljs-meta { color: #93a9ae; }

/* ---------- comparison table ---------- */
.reveal table.z-table { border-collapse: separate; border-spacing: 0; width: 100%; font-size: .74em; }
.reveal table.z-table th {
  text-align: left; padding: .55em .8em; color: var(--z-mint); font-weight: 700;
  border-bottom: 2px solid var(--z-emerald); text-transform: uppercase; letter-spacing: 1px; font-size: .82em;
}
.reveal table.z-table td { padding: .5em .8em; border-bottom: 1px solid var(--z-border-soft); color: var(--z-ink-soft); vertical-align: top; }
.reveal table.z-table tr:last-child td { border-bottom: none; }
.reveal table.z-table td:first-child { color: #fff; font-weight: 600; }

/* pros/cons */
.z-pc { display: grid; grid-template-columns: 1fr 1fr; gap: .8em; }
.z-pc .z-pcbox { border-radius: 12px; padding: .7em .95em; border: 1px solid var(--z-border-soft); background: var(--z-bg-2); }
.z-pc .z-pcbox.pro { border-color: rgba(60,232,166,.35); }
.z-pc .z-pcbox.con { border-color: rgba(255,107,107,.3); }
.z-pc h4 { font-size: .82em; margin-bottom: .4em; display: flex; align-items: center; gap: .4em; }
.z-pc .pro h4 { color: var(--z-mint); }
.z-pc .con h4 { color: var(--z-rose); }
.z-pc ul li { font-size: .72em; margin-bottom: .3em; }
.z-pc ul li::before { width: .45em; height: .45em; }

/* ---------- demo / lab banner ---------- */
.z-banner { display: flex; flex-direction: column; justify-content: center; height: 100%; align-items: flex-start; }
.z-banner .z-kind {
  display: inline-flex; align-items: center; gap: .6em; font-size: .55em; font-weight: 800;
  letter-spacing: 3px; text-transform: uppercase; padding: .6em 1.2em; border-radius: 999px;
  margin-bottom: .6em;
}
.z-banner.demo .z-kind { background: rgba(127,208,255,.12); color: #7fd0ff; border: 1px solid rgba(127,208,255,.4); }
.z-banner.lab .z-kind { background: var(--z-grad); color: #05231a; }
.z-banner h2 { font-size: 2.1em; margin-bottom: .3em; }
.z-banner .z-meta { display: flex; gap: 1.4em; margin-top: .8em; color: var(--z-muted); font-size: .7em; }
.z-banner .z-meta b { color: var(--z-ink); }
.z-banner .z-steps { margin-top: 1em; font-size: .8em; color: var(--z-ink-soft); }

/* ---------- workflow / pipeline diagram ---------- */
.z-flow { display: flex; align-items: stretch; gap: 0; width: 100%; }
.z-flow .z-step {
  flex: 1; background: var(--z-bg-2); border: 1px solid var(--z-border-soft);
  border-radius: 12px; padding: .7em .6em; text-align: center; position: relative;
}
.z-flow .z-step .n { font-family: var(--z-mono); color: var(--z-mint); font-size: .62em; font-weight: 700; }
.z-flow .z-step h4 { font-size: .82em; margin: .2em 0 .15em; }
.z-flow .z-step p { font-size: .58em; color: var(--z-muted); margin: 0; line-height: 1.3; }
.z-flow .z-arrow { display: flex; align-items: center; color: var(--z-emerald); padding: 0 .35em; font-size: 1.2em; }

/* ---------- footer / chrome ---------- */
.reveal .z-footer {
  position: absolute; bottom: 18px; left: 40px; right: 40px;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 13px; color: var(--z-muted); z-index: 30; pointer-events: none;
}
.reveal .z-footer .z-fl { display: flex; align-items: center; gap: .5em; font-weight: 600; }
.reveal .z-footer .z-fl b { color: var(--z-ink-soft); }
.reveal .z-footer .z-fl .dot { color: var(--z-emerald); }
.reveal .slide-number { background: transparent; color: var(--z-muted); font-family: var(--z-mono); }

/* progress bar tint */
.reveal .progress { color: var(--z-mint); height: 4px; }

/* content slide vertical rhythm helper */
.z-pad { padding-top: .2em; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1em; align-items: start; }
.two-col.w-code { grid-template-columns: .92fr 1.08fr; }
.lead { font-size: 1.05em; color: var(--z-ink-soft); max-width: 24em; }

/* small kbd */
kbd { font-family: var(--z-mono); background: var(--z-bg-3); border: 1px solid var(--z-border); border-bottom-width: 2px; border-radius: 6px; padding: .05em .45em; font-size: .8em; color: var(--z-ink); }

/* fragment tint keeps reveal defaults */
.reveal .slides section .fragment.highlight-current-green.current-fragment { color: var(--z-mint); }

/* print / pdf tweaks */
@media print {
  .reveal .z-footer { color: #557; }
}