/* ────────────────────────────────────────────────────────────
   RocmTop landing page
   ──────────────────────────────────────────────────────────── */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0d0d10;
  --bg-elev: #17171c;
  --bg-elev-2: #1f1f26;
  --border: #26262e;
  --text: #ebebee;
  --text-dim: #9b9ba4;
  --accent: #ed1c24;
  --accent-soft: #ff4d4d;
  --green: #22c55e;
  --blue: #3b82f6;
  --yellow: #eab308;
  --red: #ef4444;
  --max-w: 1100px;
  --radius: 12px;
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.45);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI',
    Roboto, Oxygen, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--text);
  text-decoration: none;
  transition: color 160ms ease;
}

a:hover {
  color: var(--accent-soft);
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-elev-2);
  padding: 2px 6px;
  border-radius: 4px;
  color: #eaeaea;
}

pre {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  line-height: 1.5;
}

pre code {
  background: transparent;
  padding: 0;
  color: #dadade;
  font-size: 14px;
}

/* ────────────────────────────────────────────────────────────
   Navigation
   ──────────────────────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: rgba(13, 13, 16, 0.78);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
}

.nav-links {
  display: flex;
  gap: 26px;
  font-size: 14px;
  color: var(--text-dim);
}

.nav-links a {
  color: var(--text-dim);
}

.nav-links a:hover {
  color: var(--text);
}

/* ────────────────────────────────────────────────────────────
   Hero
   ──────────────────────────────────────────────────────────── */

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

.hero {
  position: relative;
  padding: 100px 0 80px;
  text-align: center;
  isolation: isolate;
}

.hero-glow {
  position: absolute;
  inset: -40px;
  pointer-events: none;
  background:
    radial-gradient(
      ellipse 640px 400px at 50% 20%,
      rgba(237, 28, 36, 0.22) 0%,
      rgba(237, 28, 36, 0) 70%
    );
  z-index: -1;
}

.hero-logo {
  display: block;
  margin: 0 auto 32px;
  border-radius: 28px;
  box-shadow: 0 16px 60px rgba(237, 28, 36, 0.25),
              0 0 0 1px var(--border);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-title .accent {
  background: linear-gradient(135deg, #ff4d4d 0%, #ed1c24 50%, #b81219 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 40px;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 120ms ease, background 200ms ease, box-shadow 200ms ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 30px rgba(237, 28, 36, 0.35);
}

.btn-primary:hover {
  background: var(--accent-soft);
  color: #fff;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--bg-elev);
  color: var(--text);
}

.hero-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 72px;
}

.hero-badges img {
  height: 20px;
}

/* ────────────────────────────────────────────────────────────
   Screenshot placeholder (mimics the real app until a PNG exists)
   ──────────────────────────────────────────────────────────── */

.hero-screenshot {
  margin: 0 auto;
  max-width: 440px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.ss-chrome {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: var(--bg-elev-2);
  border-bottom: 1px solid var(--border);
}

.ss-chrome span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #3a3a45;
}

.ss-chrome span:first-child { background: #ff5f57; }
.ss-chrome span:nth-child(2) { background: #febc2e; }
.ss-chrome span:nth-child(3) { background: #28c940; }

.ss-body {
  padding: 18px;
}

.ss-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.ss-header strong {
  font-size: 17px;
}

.ss-chip {
  background: #2a2a32;
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
}

.ss-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.ss-card {
  background: #1c1c22;
  border-radius: 8px;
  padding: 12px;
}

.ss-label {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.ss-value {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.ss-value span {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  margin-left: 2px;
}

.ss-green { color: var(--green); }

.ss-bar {
  height: 4px;
  background: #2a2a32;
  border-radius: 2px;
  overflow: hidden;
}

.ss-bar div {
  height: 100%;
  border-radius: 2px;
}

/* ────────────────────────────────────────────────────────────
   Features
   ──────────────────────────────────────────────────────────── */

section {
  padding: 80px 0;
}

section h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-align: center;
  margin-bottom: 48px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.feature {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 22px;
  transition: transform 200ms ease, border-color 200ms ease, background 200ms ease;
}

.feature:hover {
  transform: translateY(-2px);
  border-color: #35353f;
  background: #1a1a20;
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 14px;
}

.feature h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature p {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.55;
}

/* ────────────────────────────────────────────────────────────
   Install section
   ──────────────────────────────────────────────────────────── */

.install {
  text-align: center;
}

.install-sub {
  color: var(--text-dim);
  max-width: 580px;
  margin: 0 auto 36px;
}

.install-code {
  text-align: left;
  max-width: 720px;
  margin: 0 auto;
}

.install-deps-h {
  margin-top: 56px;
  margin-bottom: 24px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.install-distros {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  text-align: left;
}

.distro h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-dim);
}

.distro pre {
  padding: 14px 18px;
  font-size: 13px;
}

/* ────────────────────────────────────────────────────────────
   FAQ
   ──────────────────────────────────────────────────────────── */

.faq {
  max-width: 760px;
  margin: 0 auto;
}

.faq details {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 0;
  margin-bottom: 12px;
  transition: background 160ms ease;
}

.faq details[open] {
  background: #1a1a20;
}

.faq summary {
  padding: 18px 22px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '+';
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 20px;
  transition: transform 180ms ease, color 180ms ease;
}

.faq details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
  color: var(--accent-soft);
}

.faq p {
  padding: 0 22px 20px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.6;
}

.faq a {
  color: var(--accent-soft);
}

/* ────────────────────────────────────────────────────────────
   Footer
   ──────────────────────────────────────────────────────────── */

.footer {
  padding: 44px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 14px;
  color: var(--text-dim);
}

.footer a {
  color: var(--text-dim);
}

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

.footer-small {
  margin-top: 10px;
  font-size: 12px;
}

/* ────────────────────────────────────────────────────────────
   Responsive tweaks
   ──────────────────────────────────────────────────────────── */

@media (max-width: 640px) {
  .nav {
    padding: 14px 18px;
  }
  .nav-links {
    gap: 16px;
    font-size: 13px;
  }
  .hero {
    padding: 64px 0 56px;
  }
  section {
    padding: 56px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}