/* ============================================================
   THE RUNBOOK BLOG — SHARED SITE STYLES (v2)
   One stylesheet for every page. Change a token here and it
   applies site-wide. Page-specific styles live in their own file
   (e.g. assets/css/consulting.css).
============================================================ */

/* ---------- Tokens: dark (default) ---------- */
:root {
  --green:        #1D9E75;
  --green-strong: #25b889;
  --green-dim:    rgba(29,158,117,0.12);
  --green-border: rgba(29,158,117,0.28);
  --amber:        #d9a21b;
  --amber-dim:    rgba(239,159,39,0.10);
  --amber-border: rgba(239,159,39,0.24);
  --on-accent:    #06231a;

  --bg-page:      #0b1622;
  --bg-surface:   #0f1f30;
  --bg-raised:    #132740;
  --bg-deep:      #0a1520;
  --border:       rgba(255,255,255,0.08);
  --border-mid:   rgba(255,255,255,0.14);
  --text-primary: #eaf2ff;
  --text-body:    #c5d5e8;
  --text-muted:   #8aa5bf;
  --text-dim:     #6a8aa5;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --max-width: 1200px;
  --nav-height: 64px;
  --shadow: 0 1px 2px rgba(0,0,0,0.2), 0 8px 24px rgba(0,0,0,0.18);
  --transition: 0.25s ease;

  color-scheme: dark;
}

/* ---------- Tokens: light ---------- */
:root[data-theme="light"] {
  --green:        #0f7a5a;
  --green-strong: #0c6a4e;
  --green-dim:    rgba(15,122,90,0.08);
  --green-border: rgba(15,122,90,0.25);
  --amber:        #9a6c00;
  --amber-dim:    rgba(200,150,10,0.08);
  --amber-border: rgba(200,150,10,0.28);
  --on-accent:    #ffffff;

  --bg-page:      #f5f7fa;
  --bg-surface:   #ffffff;
  --bg-raised:    #ffffff;
  --bg-deep:      #eef2f7;
  --border:       #e2e8f0;
  --border-mid:   #cfdbe7;
  --text-primary: #0d1f2d;
  --text-body:    #23364a;
  --text-muted:   #4a6378;
  --text-dim:     #647d92;
  --shadow: 0 1px 2px rgba(13,31,45,0.05), 0 8px 24px rgba(13,31,45,0.06);

  color-scheme: light;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 16px); }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  background: var(--bg-page);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

.rb-wrap { max-width: var(--max-width); margin: 0 auto; padding-inline: 1.5rem; }
.rb-skip { position: absolute; left: -9999px; top: 0; }
.rb-skip:focus { left: 1rem; top: 1rem; z-index: 200; background: var(--green); color: var(--on-accent); padding: 8px 14px; border-radius: var(--radius-sm); }

/* ---------- Type ---------- */
h1, h2, h3, h4 { color: var(--text-primary); letter-spacing: -0.02em; line-height: 1.2; font-weight: 650; }
h1 { font-size: clamp(2.1rem, 4.5vw, 3.25rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.15rem; }
.rb-accent { color: var(--green); }
.rb-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.75rem;
}
.rb-lede { font-size: 1.125rem; color: var(--text-muted); max-width: 62ch; }

/* ---------- Buttons ---------- */
.rb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 15px/1 var(--font-sans);
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform 0.15s;
}
.rb-btn:active { transform: translateY(1px); }
.rb-btn-primary { background: var(--green); color: var(--on-accent); }
.rb-btn-primary:hover { background: var(--green-strong); }
.rb-btn-ghost { background: transparent; color: var(--text-primary); border-color: var(--border-mid); }
.rb-btn-ghost:hover { border-color: var(--green-border); color: var(--green); }
.rb-btn-block { width: 100%; }

/* ---------- Surfaces ---------- */
.rb-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: background var(--transition), border-color var(--transition);
}
.rb-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 500;
  padding: 4px 10px; border-radius: 999px;
  background: var(--green-dim); color: var(--green); border: 1px solid var(--green-border);
}
.rb-pill-amber { background: var(--amber-dim); color: var(--amber); border-color: var(--amber-border); }

/* Draft marker — anything still waiting on real content. Remove before launch. */
.rb-todo {
  background: var(--amber-dim);
  color: var(--amber);
  border: 1px dashed var(--amber-border);
  border-radius: 4px;
  padding: 0 5px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

/* ---------- Nav ---------- */
.rb-nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg-page) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.rb-nav-content {
  max-width: var(--max-width); margin: 0 auto; padding-inline: 1.5rem;
  height: var(--nav-height);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.rb-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.rb-logo-mark {
  width: 34px; height: 34px; border-radius: 8px; background: var(--green);
  display: grid; place-items: center;
}
.rb-logo-mark svg { width: 16px; height: 16px; fill: none; stroke: var(--on-accent); stroke-width: 2.5; stroke-linecap: round; }
.rb-logo-text { font-weight: 650; font-size: 15px; color: var(--text-primary); letter-spacing: -0.01em; }

.rb-nav-links { display: flex; align-items: center; gap: 2px; }
.rb-nav-links a {
  font-size: 14px; color: var(--text-muted);
  padding: 8px 14px; border-radius: var(--radius-sm);
  transition: background 0.2s, color 0.2s;
}
.rb-nav-links a:hover { background: var(--green-dim); color: var(--text-primary); }
.rb-nav-links a[aria-current="page"] { color: var(--green); }
.rb-nav-links a.rb-nav-cta { color: var(--on-accent); background: var(--green); font-weight: 600; margin-left: 6px; }
.rb-nav-links a.rb-nav-cta:hover { background: var(--green-strong); color: var(--on-accent); }

.rb-nav-right { display: flex; align-items: center; gap: 8px; }
.rb-icon-btn {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  display: grid; place-items: center;
  background: transparent; border: 1px solid var(--border-mid);
  color: var(--text-muted); cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.rb-icon-btn:hover { background: var(--green-dim); color: var(--text-primary); }
.rb-icon-btn svg { width: 18px; height: 18px; }
.icon-sun { display: none; }
:root[data-theme="light"] .icon-sun { display: block; }
:root[data-theme="light"] .icon-moon { display: none; }
.rb-menu-btn { display: none; }

/* ---------- Footer ---------- */
.rb-footer { border-top: 1px solid var(--border); margin-top: 5rem; }
.rb-footer-grid {
  max-width: var(--max-width); margin: 0 auto; padding: 3rem 1.5rem 2rem;
  display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2rem;
}
.rb-footer-tagline { font-size: 14px; color: var(--text-dim); margin-top: 0.75rem; max-width: 30ch; }
.rb-footer-title { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--text-dim); margin-bottom: 0.75rem; text-transform: uppercase; }
.rb-footer-links { display: flex; flex-direction: column; gap: 8px; }
.rb-footer-links a { font-size: 14px; color: var(--text-muted); }
.rb-footer-links a:hover { color: var(--green); }
.rb-footer-bottom {
  max-width: var(--max-width); margin: 0 auto; padding: 1.25rem 1.5rem 2rem;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  border-top: 1px solid var(--border);
  font-size: 13px; color: var(--text-dim);
}
.rb-footer-bottom nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.rb-footer-bottom a:hover { color: var(--green); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .rb-menu-btn { display: grid; }
  .rb-nav-links {
    display: none;
    position: absolute; top: var(--nav-height); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 1rem 1.5rem 1.5rem;
    background: var(--bg-page);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  .rb-nav.is-open .rb-nav-links { display: flex; }
  .rb-nav-links a { padding: 12px 14px; font-size: 16px; }
  .rb-nav-links .rb-nav-cta { margin: 8px 0 0; text-align: center; }
  .rb-footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .rb-wrap, .rb-nav-content { padding-inline: 1rem; }
  .rb-footer-grid { grid-template-columns: 1fr; padding-inline: 1rem; }
  .rb-footer-bottom { padding-inline: 1rem; }
}

/* ============================================================
   SHARED COMPONENTS (used on several pages)
============================================================ */
.rb-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.rb-section { padding-block: 4.5rem 0; }
.rb-section-head { display: flex; justify-content: space-between; align-items: end; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.75rem; }
.rb-section-head h2 { margin: 0; }
.rb-section-head p { color: var(--text-muted); max-width: 60ch; margin-top: 0.5rem; }
.rb-link { display: inline-flex; align-items: center; gap: 6px; color: var(--green); font-weight: 600; font-size: 15px; }
.rb-link svg { width: 16px; height: 16px; transition: transform 0.2s; }
.rb-link:hover svg { transform: translateX(3px); }
.rb-post-kind { font: 500 12px var(--font-mono); color: var(--text-dim); }

/* Page hero (non-home pages) */
.rb-page-hero {
  background: radial-gradient(900px 420px at 88% -20%, var(--green-dim), transparent 70%), var(--bg-page);
  border-bottom: 1px solid var(--border);
  padding-block: 4rem 3.25rem;
}
.rb-page-hero h1 { margin: 0.25rem 0 1rem; max-width: 22ch; }
.rb-hero-stats { display: flex; gap: 2.5rem; flex-wrap: wrap; margin-top: 2rem; }
.rb-hero-stat strong { display: block; font: 650 1.75rem/1 var(--font-mono); color: var(--text-primary); }
.rb-hero-stat span { font-size: 13px; color: var(--text-dim); }

/* Runbook cards */
.rb-post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.rb-post-card { padding: 1.4rem; display: flex; flex-direction: column; }
.rb-post-card:hover, .rb-res-free:hover, .rb-topic:hover, .rb-featured:hover { border-color: var(--green-border); }
.rb-post-card-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 0.9rem; }
.rb-post-card h3 { font-size: 1.05rem; line-height: 1.35; margin-bottom: 0.5rem; }
.rb-post-card p { font-size: 14.5px; color: var(--text-muted); line-height: 1.55; margin-bottom: 1rem; }
.rb-post-card .rb-post-meta { margin-top: auto; display: flex; gap: 12px; font: 500 12px var(--font-mono); color: var(--text-dim); }

/* Newsletter */
.rb-newsletter {
  margin-top: 4.5rem; padding: 2rem;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 2rem; align-items: center;
  background: radial-gradient(500px 220px at 0% 0%, var(--green-dim), transparent 70%), var(--bg-surface);
}
.rb-newsletter h2 { font-size: 1.5rem; margin-bottom: 0.4rem; }
.rb-newsletter p { color: var(--text-muted); font-size: 15px; }
.rb-kit-form { display: flex; flex-wrap: wrap; gap: 10px; }
.rb-kit-form input {
  flex: 1 1 220px; min-width: 0;
  font: 400 15px var(--font-sans); color: var(--text-primary);
  background: var(--bg-deep); border: 1px solid var(--border-mid); border-radius: var(--radius-sm);
  padding: 13px 14px;
}
.rb-kit-form input:focus { outline: none; border-color: var(--green); }
.rb-kit-msg { flex-basis: 100%; font-size: 14px; min-height: 1.2em; }
.rb-kit-msg.is-ok { color: var(--green); }
.rb-kit-msg.is-err { color: #e46a6a; }

@media (max-width: 1024px) { .rb-post-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 760px) {
  .rb-post-grid { grid-template-columns: 1fr; }
  .rb-newsletter { grid-template-columns: 1fr; padding: 1.5rem; }
  .rb-page-hero { padding-block: 3rem 2.5rem; }
}