/* Agentic Decks — Vanilla CSS
   Typography: IBM Plex Sans (400, 600, 700) + IBM Plex Mono
   Colors: brand palette */

/* ── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --color-agentic:    #354190;
  --color-decks:      #5759AC;
  --color-wordmark:   #1F2A5A;
  --color-mark-fill:  #5CA5EB;
  --color-accent:     #5CA5EB;
  --color-link:       #354190;
  --color-body:       #1F2A5A;
  --color-bg:         #FFFFFF;
  --color-surface:    #F7F8FC;
  --color-border:     #DDE2F0;
  --color-muted:      #6B7499;
  --color-code-bg:    #F0F2F9;

  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Fira Code', 'Cascadia Code', monospace;

  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   2rem;
  --space-xl:   4rem;

  /* Widened from 52rem — fills screen on typical 1280–1440px monitors */
  --content-width: 72rem;
  --wide-width:    88rem;
  --side-pad:      clamp(1rem, 4vw, 3rem);
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-body);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ─────────────────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-weight: 700;
  color: var(--color-wordmark);
  line-height: 1.25;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}
h1 { font-size: 2.25rem; margin-top: 0; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

p { margin-bottom: var(--space-md); }

a { color: var(--color-link); text-decoration: underline; }
a:hover { color: var(--color-accent); }

strong { font-weight: 600; }
em { font-style: italic; }

ul, ol { margin: 0 0 var(--space-md) var(--space-lg); }
li { margin-bottom: var(--space-xs); }

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
  color: var(--color-wordmark);
}

pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: var(--space-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}
pre code { background: none; padding: 0; font-size: 1em; }

blockquote {
  border-left: 3px solid var(--color-border);
  padding-left: var(--space-md);
  color: var(--color-muted);
  margin: var(--space-md) 0;
  font-style: italic;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-lg) 0;
}

/* ── Tables ─────────────────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-lg);
  font-size: 0.9375rem;
}
th, td {
  text-align: left;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}
th {
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-wordmark);
  background: var(--color-surface);
}
tr:last-child td { border-bottom: none; }

/* ── Layout ─────────────────────────────────────────────────────────────── */
main {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--side-pad);
}

main.wide {
  max-width: var(--wide-width);
}

/* ── Header / Nav ───────────────────────────────────────────────────────── */
header {
  border-bottom: 2px solid var(--color-accent);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

nav {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 var(--side-pad);
  height: 3.5rem;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.site-logo {
  display: block;
  /* Preserve SVG aspect ratio; height set via attribute */
  width: auto;
}

/* Footer logo sits inline with tagline */
.footer-logo {
  display: inline-block;
  vertical-align: middle;
  width: auto;
}

/* Deckrun product page mark */
.product-mark {
  margin-bottom: var(--space-lg);
}

/* Keep these for any legacy text uses */
.word-agentic { color: var(--color-agentic); }
.word-decks   { color: var(--color-decks); }

.nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-left: auto;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-wordmark);
  font-size: 0.9375rem;
  font-weight: 400;
}
.nav-links a:hover { color: var(--color-accent); }

/* Active nav item — highlighted when on that page */
.nav-links[data-page="deckrun"] a[href*="deckrun/"],
.nav-links[data-page="schemas"] a[href*="schemas/"],
.nav-links[data-page="execution-model"] a[href*="execution-model/"],
.nav-links[data-page="pricing"] a[href*="pricing/"],
.nav-links[data-page="docs"] a[href*="docs/"],
.nav-links[data-page="why"] a[href*="why/"],
.nav-links[data-page="about"] a[href*="about/"],
.nav-links[data-page="contact"] a[href*="contact/"] {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-cta {
  font-weight: 600 !important;
  color: var(--color-wordmark) !important;
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
}
.nav-cta:hover { border-color: var(--color-accent) !important; }

/* ── Nav auth (sign-in / waitlist icon) ──────────────────────────────────── */
.nav-auth {
  position: relative;
  display: flex;
  align-items: center;
  margin-left: var(--space-sm);
}

.nav-auth-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-wordmark);
  padding: 0;
  transition: border-color 0.15s, background 0.15s;
  position: relative;
}
.nav-auth-btn:hover { border-color: var(--color-accent); }

/* icon visible when signed out */
.nav-auth-icon-out { display: block; }
/* initials visible when signed in */
.nav-auth-initials {
  display: none;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1;
  text-transform: uppercase;
}
/* spinner visible when loading */
.nav-auth-spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: nav-auth-spin 0.7s linear infinite;
}
@keyframes nav-auth-spin { to { transform: rotate(360deg); } }

/* signed-in state */
.nav-auth[data-auth="in"] .nav-auth-icon-out { display: none; }
.nav-auth[data-auth="in"] .nav-auth-initials  { display: block; }
.nav-auth[data-auth="in"] .nav-auth-btn { border-color: var(--color-accent); }

/* loading state */
.nav-auth[data-auth="loading"] .nav-auth-icon-out { display: none; }
.nav-auth[data-auth="loading"] .nav-auth-spinner   { display: block; }

/* dropdown panel */
.nav-auth-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-sm) var(--space-md);
  min-width: 220px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
  z-index: 200;
}
.nav-auth-panel-header {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-muted);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* provider buttons */
.nav-auth-provider-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 0.5rem 0.75rem;
  margin-bottom: 6px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--color-body);
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s;
}
.nav-auth-provider-btn:hover { border-color: var(--color-accent); background: rgba(255,255,255,0.03); }
.nav-auth-provider-btn--github { color: var(--color-wordmark); }

/* signed-in panel */
.nav-auth-email {
  font-size: 0.82rem;
  color: var(--color-body);
  margin: 0 0 6px;
  word-break: break-all;
}
.nav-auth-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  padding: 1px 6px;
  margin-bottom: var(--space-sm);
}
.nav-auth-signout-btn {
  display: block;
  width: 100%;
  padding: 0.4rem 0.75rem;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--color-muted);
  font-family: inherit;
  text-align: left;
  transition: border-color 0.15s, color 0.15s;
}
.nav-auth-signout-btn:hover { border-color: var(--color-border); color: var(--color-body); }

/* ── Hero — full-bleed, CSS dot-pattern background ──────────────────────── */
/* Breaks out of main's max-width using the 50vw trick.
   margin-top pulls the hero flush to the nav when main has top padding. */
.hero {
  width: 100vw;
  position: relative;
  left: 50%;
  margin-left: -50vw;
  /* Dark brand background with radial-dot pattern overlay */
  background-color: var(--color-wordmark);
  background-image:
    radial-gradient(circle, rgba(92, 165, 235, 0.18) 1.5px, transparent 1.5px);
  background-size: 22px 22px;
  padding: 5rem var(--side-pad) 4rem;
  margin-top: calc(-1 * var(--space-xl)); /* cancel main's top padding */
  margin-bottom: var(--space-xl);
}

.hero-inner {
  max-width: var(--content-width);
  margin: 0 auto;
}

.hero-logo {
  display: block;
  width: auto;
  margin-bottom: var(--space-lg);
  /* Ensure it doesn't over-scale on large displays */
  max-width: 220px;
}

.hero-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-mark-fill);
  margin-bottom: var(--space-sm);
}

.hero-headline {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: #ffffff;
  margin: 0 0 var(--space-md);
  max-width: 22ch;
}

.hero-sub {
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 44ch;
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.hero-links {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  align-items: center;
}

.hero-links a {
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
}

.hero-links .link-primary {
  color: var(--color-mark-fill);
}
.hero-links .link-primary:hover { color: #ffffff; }

.hero-links .link-secondary {
  color: rgba(255, 255, 255, 0.55);
}
.hero-links .link-secondary:hover { color: rgba(255, 255, 255, 0.9); }

.hero-links .link-sep {
  color: rgba(255, 255, 255, 0.25);
  user-select: none;
}

/* ── Embedded video ─────────────────────────────────────────────────────── */
.video-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  margin: var(--space-lg) 0;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.video-wrap iframe {
  width: 100%;
  height: 100%;
  display: block;
}
.video-more {
  margin-top: calc(-1 * var(--space-sm));
  font-size: 0.875rem;
}

/* ── Schema cards ───────────────────────────────────────────────────────── */
.schema-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}
.schema-card {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--space-md);
}
.schema-card h3 { margin-top: 0; font-size: 1rem; }
.schema-card p  { font-size: 0.875rem; color: var(--color-muted); margin-bottom: var(--space-sm); }
.schema-card a  { font-size: 0.875rem; font-family: var(--font-mono); }

/* ── Notice / info box ──────────────────────────────────────────────────── */
.notice {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
}
.notice p:last-child { margin-bottom: 0; }

/* ── Pricing cards ──────────────────────────────────────────────────────── */
.plan-cards {
  display: grid;
  /* 3 equal columns; shrink gracefully on smaller widths */
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.plan-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.plan-card.plan-featured {
  border-color: var(--color-accent);
  border-width: 2px;
}

.plan-card .plan-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-wordmark);
  margin: 0;
}

.plan-card .plan-for {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: 0;
}

.plan-card .plan-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-sm) 0;
}

.plan-card ul {
  margin: 0;
  padding-left: var(--space-md);
  font-size: 0.9375rem;
}

.plan-card li {
  margin-bottom: var(--space-xs);
}

.plan-addon {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  background: var(--color-surface);
}

.plan-addon .plan-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-wordmark);
  margin: 0 0 var(--space-xs);
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-xl);
  padding: var(--space-lg) 0;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.footer-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 var(--side-pad);
  display: flex;
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}

.footer-left {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
}
.footer-tagline { font-weight: 400; color: var(--color-muted); }

.footer-nav {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-left: auto;
}
.footer-nav a { color: var(--color-muted); text-decoration: none; }
.footer-nav a:hover { color: var(--color-accent); }

.footer-legal {
  width: 100%;
  font-size: 0.8125rem;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-sm);
}

/* ── Anchor links (from toc extension) ──────────────────────────────────── */
.anchor {
  opacity: 0;
  text-decoration: none;
  margin-left: 0.5ch;
  color: var(--color-border);
  font-weight: 400;
  transition: opacity 0.15s;
}
h1:hover .anchor, h2:hover .anchor, h3:hover .anchor { opacity: 1; }

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .plan-cards { grid-template-columns: 1fr; }
  .hero-headline { font-size: 2.25rem; }
}

@media (max-width: 600px) {
  h1 { font-size: 1.75rem; }
  main { padding: var(--space-lg) var(--space-md); }
  nav { flex-wrap: wrap; height: auto; padding: var(--space-sm) var(--space-md); }
  .nav-links { gap: var(--space-sm); }
  .hero { padding: 3rem var(--space-md) 2.5rem; }
}