/* ==========================================================================
   PNT Data Center — Cloud Images
   Design tokens sourced from ui-ux-pro-max design system
   (design-system/pnt-cloud-images/MASTER.md)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Brand palette */
  --bg: #0F172A;
  --bg-elevated: #0B1120;
  --primary: #1E293B;
  --secondary: #334155;
  --accent: #22C55E;
  --accent-strong: #16A34A;
  --accent-glow: rgba(34, 197, 94, 0.22);
  --fg: #F8FAFC;
  --fg-muted: #94A3B8;
  --fg-subtle: #64748B;
  --border: #334155;
  --border-soft: rgba(255, 255, 255, 0.08);
  --border-soft-strong: rgba(255, 255, 255, 0.16);
  --card-bg: linear-gradient(180deg, rgba(51, 65, 85, 0.32), rgba(15, 23, 42, 0.22));
  --destructive: #EF4444;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Shape / motion */
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.28);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.45);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur: 220ms;

  /* Layout */
  --header-h: 72px;
  --chip-h: 60px;
  --container: 1280px;

  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  color-scheme: dark;
}

/* ---------------------------------- Reset -------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

svg { width: 1em; height: 1em; flex-shrink: 0; }

a { color: inherit; text-decoration: none; }

ul { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4, p { margin: 0; }

button {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  cursor: pointer;
}

input { font-family: inherit; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--space-lg);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: var(--space-md);
  z-index: 200;
  background: var(--accent);
  color: #06210F;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  transition: top var(--dur) var(--ease);
}

.skip-link:focus-visible { top: var(--space-md); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Ambient background glow — decorative, ignored by AT */
.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.ambient::before,
.ambient::after {
  content: '';
  position: absolute;
  width: 60vw;
  height: 60vw;
  max-width: 800px;
  max-height: 800px;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.16;
}

.ambient::before {
  top: -18%;
  left: -12%;
  background: radial-gradient(circle, var(--accent), transparent 70%);
}

.ambient::after {
  bottom: -20%;
  right: -10%;
  background: radial-gradient(circle, #3B82F6, transparent 70%);
  opacity: 0.12;
}

/* ---------------------------------- Header ------------------------------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border-soft);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
  transition: opacity var(--dur) var(--ease);
}

.brand:hover { opacity: 0.85; }

.brand img {
  height: 28px;
  width: auto;
}

.brand-divider {
  width: 1px;
  height: 22px;
  background: var(--border-soft-strong);
}

.brand-suffix {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.main-nav a {
  font-size: 0.9375rem;
  color: var(--fg-muted);
  transition: color var(--dur) var(--ease);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a:focus-visible { color: var(--fg); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

.header-link-external {
  display: none;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--fg-subtle);
  transition: color var(--dur) var(--ease);
}

.header-link-external svg { width: 14px; height: 14px; }

.header-link-external:hover { color: var(--fg-muted); }

@media (min-width: 1024px) {
  .header-link-external { display: inline-flex; }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease), opacity var(--dur) var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #06210F;
  box-shadow: 0 0 0 0 var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px -4px var(--accent-glow);
  background: var(--accent-strong);
}

.btn-outline {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border-soft-strong);
}

.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(34, 197, 94, 0.08);
  transform: translateY(-1px);
}

.btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--fg);
}

.nav-toggle svg { width: 22px; height: 22px; }

.nav-toggle .icon-close { display: none; }

@media (min-width: 900px) {
  .nav-toggle { display: none; }
}

@media (max-width: 899px) {
  .main-nav { display: none; }
  .header-actions .btn-primary { display: none; }
}

@media (max-width: 420px) {
  .brand-suffix,
  .brand-divider { display: none; }
}

/* Mobile nav overlay */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 99;
  background: rgba(11, 17, 32, 0.98);
  backdrop-filter: blur(10px);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
  padding: var(--space-xl) var(--space-lg);
  overflow-y: auto;
}

.mobile-nav.is-open {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

.mobile-nav ul { display: flex; flex-direction: column; gap: var(--space-md); }

.mobile-nav a {
  display: block;
  font-size: 1.125rem;
  font-weight: 500;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-soft);
  color: var(--fg);
}

.mobile-nav .btn { margin-top: var(--space-lg); width: 100%; justify-content: center; }

body.nav-open { overflow: hidden; }

/* ---------------------------------- Hero --------------------------------- */

.hero {
  padding: calc(var(--header-h) + var(--space-3xl)) 0 var(--space-2xl);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.25);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: var(--space-lg);
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.02em;
  max-width: 16ch;
}

.hero .lede {
  margin-top: var(--space-lg);
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--fg-muted);
  max-width: 640px;
}

/* Search */
.search-wrap {
  margin-top: var(--space-2xl);
  max-width: 560px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box svg.icon-search {
  position: absolute;
  left: 18px;
  width: 20px;
  height: 20px;
  color: var(--fg-subtle);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-soft-strong);
  border-radius: var(--radius-md);
  color: var(--fg);
  font-size: 1rem;
  padding: 16px 48px 16px 48px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.search-box input::placeholder { color: var(--fg-subtle); }

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.14);
}

.search-clear {
  position: absolute;
  right: 12px;
  width: 32px;
  height: 32px;
  display: none;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--fg-subtle);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.search-clear:hover { background: rgba(255, 255, 255, 0.08); color: var(--fg); }
.search-clear.is-visible { display: flex; }
.search-clear svg { width: 16px; height: 16px; }

.search-hint {
  margin-top: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--fg-subtle);
  display: flex;
  align-items: center;
  gap: 6px;
}

.search-hint svg { width: 14px; height: 14px; flex-shrink: 0; }

/* Stats */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--fg);
  line-height: 1;
}

.stat-label {
  margin-top: 4px;
  font-size: 0.8125rem;
  color: var(--fg-subtle);
}

/* -------------------------------- Chip nav -------------------------------- */

.chip-nav-wrap {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}

.chip-nav {
  display: flex;
  gap: var(--space-sm);
  padding-block: var(--space-md);
  overflow-x: auto;
  scrollbar-width: none;
}

.chip-nav::-webkit-scrollbar { display: none; }

.chip {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-soft-strong);
  color: var(--fg-muted);
  background: rgba(255, 255, 255, 0.02);
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
}

.chip:hover { color: var(--fg); border-color: var(--border-soft-strong); background: rgba(255, 255, 255, 0.06); }

.chip.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #06210F;
}

/* --------------------------------- Sections ------------------------------- */

.section { padding: var(--space-3xl) 0; scroll-margin-top: calc(var(--header-h) + var(--chip-h) + 8px); }
.section + .section { border-top: 1px solid var(--border-soft); }

.section-head { margin-bottom: var(--space-xl); max-width: 680px; }

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-head p {
  margin-top: var(--space-sm);
  color: var(--fg-muted);
  font-size: 1rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

/* OS card */
.os-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.os-card:hover {
  transform: translateY(-3px);
  border-color: rgba(34, 197, 94, 0.35);
  box-shadow: var(--shadow-lg);
}

.os-card__top { display: flex; align-items: flex-start; gap: var(--space-md); }

.os-card__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
}

/* Brand logos ship in their own official colors — some (e.g. CentOS' navy,
   AlmaLinux' near-black) are unreadable on a dark badge, so give logo badges
   a white backing chip. Generic stroke icons keep the dark badge. */
.os-card__icon:has(img) {
  background: #ffffff;
}

.os-card__icon img,
.os-card__icon svg { width: 24px; height: 24px; }

.os-card__title { font-size: 1.0625rem; font-weight: 600; }

.os-card__formats {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--fg-subtle);
  text-transform: uppercase;
}

.os-card__desc {
  margin-top: var(--space-md);
  font-size: 0.9375rem;
  color: var(--fg-muted);
  line-height: 1.55;
}

.os-card__versions {
  margin-top: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.version-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-soft);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.version-pill:hover,
.version-pill:focus-visible {
  background: rgba(34, 197, 94, 0.14);
  border-color: var(--accent);
  color: var(--fg);
  transform: translateY(-1px);
}

.version-pill svg {
  width: 13px;
  height: 13px;
  opacity: 0.55;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.version-pill:hover svg { opacity: 1; transform: translate(1px, -1px); }

/* Tool card */
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.tool-card:hover {
  transform: translateY(-3px);
  border-color: rgba(34, 197, 94, 0.35);
  box-shadow: var(--shadow-lg);
}

.tool-card__desc { color: var(--fg-muted); font-size: 0.9375rem; line-height: 1.55; flex-grow: 1; }

.tool-card .btn-outline { align-self: flex-start; }

/* Empty state */
.empty-state {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
  padding: var(--space-3xl) 0;
  color: var(--fg-muted);
}

.empty-state.is-visible { display: flex; }

.empty-state svg { width: 40px; height: 40px; color: var(--fg-subtle); }

.empty-state .btn { margin-top: var(--space-sm); }

body.is-filtering .catalog-section { display: none; }
body.is-filtering .catalog-section.has-match { display: block; }
body.is-filtering .os-card,
body.is-filtering .tool-card { display: none; }
body.is-filtering .os-card.is-match,
body.is-filtering .tool-card.is-match { display: block; }

/* ------------------------------ How it works ------------------------------ */

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.step { position: relative; padding-left: 52px; }

.step__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h3 { font-size: 1rem; font-weight: 600; }
.step p { margin-top: 6px; font-size: 0.9375rem; color: var(--fg-muted); line-height: 1.55; }

/* ---------------------------------- Footer -------------------------------- */

.site-footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-soft);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-2xl);
}

@media (max-width: 767px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
}

.footer-brand img { height: 26px; margin-bottom: var(--space-md); }

.footer-brand p {
  color: var(--fg-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: var(--space-md);
}

.footer-list { display: flex; flex-direction: column; gap: var(--space-sm); }

.footer-list a,
.footer-list span {
  color: var(--fg-muted);
  font-size: 0.9375rem;
  transition: color var(--dur) var(--ease);
}

.footer-list a:hover { color: var(--fg); }

.footer-bottom {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-soft);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-md);
  font-size: 0.8125rem;
  color: var(--fg-subtle);
}

.footer-bottom a { color: var(--fg-subtle); }
.footer-bottom a:hover { color: var(--fg-muted); }

/* ------------------------------- Back to top ------------------------------ */

.back-to-top {
  position: fixed;
  right: var(--space-lg);
  bottom: var(--space-lg);
  z-index: 80;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #06210F;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.back-to-top.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { background: var(--accent-strong); }
.back-to-top svg { width: 20px; height: 20px; }

/* --------------------------------- Reveal --------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 500ms var(--ease), transform 500ms var(--ease);
}

.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 640px) {
  .stats-row { gap: var(--space-xl); }
  .stat-value { font-size: 1.625rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}