/* =============================================================
   CloudRox — Design System
   A premium, terminal-inspired DevOps/Linux engineering identity.
   ============================================================= */

:root {
  /* Palette */
  --bg-0: #0b0f0e;          /* deepest charcoal */
  --bg-1: #101513;          /* panel background */
  --bg-2: #161c1a;          /* card background */
  --bg-3: #1d2422;          /* hover/elevated */
  --border: #263230;
  --border-soft: #1c2624;

  --green: #3ddc84;         /* professional green accent */
  --green-dim: #2a9d5f;
  --cyan: #4fd1e8;          /* subtle cyan accent */
  --amber: #e8b84f;         /* warnings */
  --red: #e8674f;           /* errors */

  --text-0: #f2f5f4;        /* white typography */
  --text-1: #c4cdc9;
  --text-2: #8a9895;        /* muted gray secondary */
  --text-3: #5c6966;

  /* Type */
  --font-display: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  /* Layout */
  --container: 1180px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg-0);
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 42px 42px;
  color: var(--text-1);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  color: var(--text-0);
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; color: var(--text-1); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
}
.eyebrow::before { content: '$'; color: var(--cyan); }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn-primary {
  background: var(--green);
  color: #06110b;
}
.btn-primary:hover { background: #55e598; transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text-0);
}
.btn-outline:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-sm { padding: 8px 14px; font-size: 0.82rem; }
.btn-danger { background: var(--red); color: #1a0705; }

/* ---------------- Header / Nav ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,15,14,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 0;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.15rem; color: var(--text-0);
}
.logo .dot { color: var(--green); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  font-size: 0.92rem; color: var(--text-2);
  transition: color .15s ease;
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-0); }
.nav-links a.active::after {
  content: ''; position: absolute; left: 0; bottom: -6px;
  width: 100%; height: 2px; background: var(--green);
}
.nav-actions { display: flex; align-items: center; gap: 14px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); color: var(--text-1);
  transition: border-color .15s ease, color .15s ease;
}
.icon-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle { display: none; }

/* ---------------- Hero ---------------- */
.hero {
  padding: 88px 0 64px;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center;
}
.hero h1 { margin-bottom: 20px; }
.hero .lede { font-size: 1.08rem; color: var(--text-1); max-width: 46ch; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.terminal {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.terminal-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; background: var(--bg-2); border-bottom: 1px solid var(--border-soft);
}
.terminal-bar span { width: 11px; height: 11px; border-radius: 50%; }
.terminal-bar .r { background: #e8674f; } .terminal-bar .y { background: #e8b84f; } .terminal-bar .g { background: #3ddc84; }
.terminal-bar .title { margin-left: 8px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-3); }
.terminal-body { padding: 22px; font-family: var(--font-mono); font-size: 0.88rem; }
.terminal-line { margin-bottom: 12px; color: var(--text-1); }
.terminal-line .prompt { color: var(--green); margin-right: 8px; }
.terminal-line .out { display: block; color: var(--text-3); margin-top: 4px; padding-left: 18px; }
.blink { animation: blink 1s step-end infinite; color: var(--cyan); }
@keyframes blink { 50% { opacity: 0; } }

/* ---------------- Sections ---------------- */
.section { padding: 64px 0; }
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 32px; gap: 20px; flex-wrap: wrap;
}
.section-head h2 { margin: 6px 0 0; }
.section-link { font-family: var(--font-mono); font-size: 0.85rem; color: var(--cyan); white-space: nowrap; }

/* ---------------- Stack grid ---------------- */
.stack-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 14px;
}
.stack-chip {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 16px 14px;
  text-align: center; font-family: var(--font-mono); font-size: 0.85rem;
  color: var(--text-1); transition: border-color .15s ease, transform .15s ease;
}
.stack-chip:hover { border-color: var(--green); transform: translateY(-2px); color: var(--text-0); }

/* ---------------- Cards ---------------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.post-card {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column;
  transition: border-color .18s ease, transform .18s ease;
}
.post-card:hover { border-color: var(--green-dim); transform: translateY(-3px); }
.post-card__image { aspect-ratio: 16/9; background: var(--bg-1); overflow: hidden; }
.post-card__image img { width: 100%; height: 100%; object-fit: cover; }
.post-card__body { padding: 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.post-card__cat {
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--green); align-self: flex-start;
  border: 1px solid var(--green-dim); padding: 3px 9px; border-radius: 999px;
}
.post-card__title { color: var(--text-0); font-family: var(--font-display); font-size: 1.08rem; margin: 0; }
.post-card__excerpt { color: var(--text-2); font-size: 0.9rem; flex: 1; }
.post-card__meta {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-3);
  border-top: 1px solid var(--border-soft); padding-top: 12px; margin-top: 4px;
}

/* ---------------- Pipeline visual ---------------- */
.pipeline { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.pipeline-node {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 16px 20px; font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-0);
  text-align: center; flex: 1; min-width: 120px;
}
.pipeline-arrow { color: var(--cyan); font-family: var(--font-mono); font-size: 1.1rem; }

/* ---------------- Newsletter ---------------- */
.newsletter {
  background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.newsletter form { display: flex; gap: 10px; flex: 1; max-width: 420px; }
.newsletter input[type=email] {
  flex: 1; padding: 12px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg-2); color: var(--text-0); font-family: var(--font-body);
}

/* ---------------- Empty states ---------------- */
.empty-state {
  text-align: center; padding: 72px 24px; border: 1px dashed var(--border); border-radius: var(--radius-lg);
  background: var(--bg-1);
}
.empty-state .glyph { font-family: var(--font-mono); color: var(--green); font-size: 2rem; margin-bottom: 14px; }
.empty-state h3 { margin-bottom: 8px; }
.empty-state p { color: var(--text-2); max-width: 46ch; margin: 0 auto; }

/* ---------------- Footer ---------------- */
.site-footer { border-top: 1px solid var(--border-soft); padding: 56px 0 28px; margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-col h4 { color: var(--text-0); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 14px; }
.footer-col a, .footer-col p { display: block; color: var(--text-2); font-size: 0.9rem; margin-bottom: 10px; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  border-top: 1px solid var(--border-soft); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 0.82rem; color: var(--text-3); font-family: var(--font-mono);
}

/* ---------------- Article typography ---------------- */
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }
.article-body h2 { margin-top: 1.6em; }
.article-body h3 { margin-top: 1.3em; }
.article-body ul, .article-body ol { color: var(--text-1); padding-left: 1.4em; }
.article-body table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: 0.92rem; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
.article-body th { background: var(--bg-2); color: var(--text-0); }
.article-body blockquote {
  border-left: 3px solid var(--green); margin: 1.4em 0; padding: 4px 0 4px 18px; color: var(--text-1);
}
.callout { border-radius: var(--radius-md); padding: 16px 18px; margin: 1.4em 0; border: 1px solid var(--border); }
.callout.note { border-color: var(--cyan); background: rgba(79,209,232,0.06); }
.callout.warning { border-color: var(--amber); background: rgba(232,184,79,0.06); }
.callout.danger { border-color: var(--red); background: rgba(232,103,79,0.06); }

.code-block {
  background: #0d1211; border: 1px solid var(--border); border-radius: var(--radius-md);
  margin: 1.4em 0; overflow: hidden;
}
.code-block__bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 14px; background: var(--bg-2); border-bottom: 1px solid var(--border-soft);
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-3);
}
.code-block__copy {
  background: transparent; border: 1px solid var(--border); color: var(--text-1);
  border-radius: 4px; padding: 4px 10px; font-size: 0.72rem; font-family: var(--font-mono);
}
.code-block__copy:hover { border-color: var(--green); color: var(--green); }
.code-block pre { margin: 0; padding: 16px; overflow-x: auto; }
.code-block code { font-family: var(--font-mono); font-size: 0.86rem; color: #d7ede1; }

.sidebar-box {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 20px; margin-bottom: 20px;
}
.sidebar-box h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-2); margin-bottom: 12px; }
.toc a { display: block; padding: 6px 0; font-size: 0.88rem; color: var(--text-2); border-left: 2px solid transparent; padding-left: 10px; }
.toc a:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------------- Forms (contact / admin) ---------------- */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-2); margin-bottom: 8px; }
.form-control {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg-2); color: var(--text-0); font-family: var(--font-body);
}
.form-control:focus { outline: none; border-color: var(--green); }
textarea.form-control { resize: vertical; min-height: 140px; }
.alert { padding: 14px 16px; border-radius: var(--radius-sm); margin-bottom: 20px; font-size: 0.9rem; }
.alert-success { background: rgba(61,220,132,0.08); border: 1px solid var(--green-dim); color: var(--green); }
.alert-error { background: rgba(232,103,79,0.08); border: 1px solid var(--red); color: var(--red); }

/* ---------------- Utility ---------------- */
.muted { color: var(--text-2); }
.mono { font-family: var(--font-mono); }
.mt-0 { margin-top: 0; }
.text-center { text-align: center; }

/* ---------------- 404 ---------------- */
.error-page { padding: 120px 0; text-align: center; }
.error-code { font-family: var(--font-mono); font-size: 5rem; color: var(--green); margin-bottom: 8px; }

/* ---------------- Responsive ---------------- */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero { grid-template-columns: 1fr; padding-top: 48px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .card-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .newsletter { flex-direction: column; align-items: stretch; }
  .newsletter form { max-width: none; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .error-code { font-size: 3.4rem; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 2px;
}

/* Mobile nav drawer */
.mobile-nav {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(6,9,8,0.6); backdrop-filter: blur(4px);
}
.mobile-nav.open { display: block; }
.mobile-nav__panel {
  position: absolute; top: 0; right: 0; width: 78%; max-width: 320px; height: 100%;
  background: var(--bg-1); border-left: 1px solid var(--border); padding: 24px; display: flex; flex-direction: column; gap: 18px;
}
.mobile-nav__panel a { font-family: var(--font-mono); font-size: 1rem; color: var(--text-0); }
.mobile-nav__close { align-self: flex-end; color: var(--text-2); }