/* Cloud Forge Solutions — interactive, responsive landing page
   Works with a simple static server (python -m http.server) */

:root {
  /* Dark theme baseline */
  --bg-900: #0b1620;
  --bg-800: #0f1e2b;
  --fg-100: #e6f0f6;
  --fg-200: #b8c8d6;

  --accent-500: #2ba0f7;
  --accent-600: #177bd0;
  --accent-700: #0f63ad;

  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.14);
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.38);
  --ring: 0 0 0 3px rgba(43, 160, 247, 0.25);

  --glow-a: rgba(43, 160, 247, 0.22);
  --glow-b: rgba(84, 214, 255, 0.18);

  --radius-lg: 16px;
  --radius-md: 12px;

  --transition-fast: 140ms ease;
  --transition-med: 260ms ease;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-900: #f6f9fc;
    --bg-800: #eef2f7;
    --fg-100: #0e2130;
    --fg-200: #3a556b;

    --card-bg: rgba(0, 0, 0, 0.04);
    --card-border: rgba(0, 0, 0, 0.08);
    --shadow: 0 10px 24px rgba(6, 22, 38, 0.15);
  }
}

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

html, body { height: 100%; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--fg-100);
  background: var(--bg-900);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background canvas and vignette */
#bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  display: block;
}
.bg-vignette {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1200px 600px at 20% 0%, rgba(43,160,247,0.15), transparent 60%),
    radial-gradient(900px 500px at 100% 10%, rgba(100,220,255,0.10), transparent 60%),
    linear-gradient(180deg, var(--bg-900), var(--bg-800));
}

/* Layout */
.container { width: min(1120px, 92vw); margin-inline: auto; }
.skip-link {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: fixed; left: 16px; top: 16px; width: auto; height: auto;
  padding: 10px 12px; background: var(--accent-600); color: #fff; border-radius: 10px; z-index: 999;
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(150%) blur(8px);
  background: linear-gradient(180deg, rgba(10,18,28,0.85), rgba(10,18,28,0.5));
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; }
.brand img { border-radius: 10px; box-shadow: var(--shadow); }
.brand-name { font-weight: 800; letter-spacing: 0.2px; }

.nav { list-style: none; display: flex; gap: 14px; margin: 0; padding: 0; }
.nav a { color: var(--fg-100); text-decoration: none; font-weight: 600; opacity: 0.9; }
.nav a:hover, .nav a:focus { color: #fff; text-decoration: underline; text-underline-offset: 4px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 16px; border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--fg-100); font-weight: 600; text-decoration: none;
  transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.btn:hover, .btn:focus { transform: translateY(-1px); border-color: rgba(255,255,255,0.25); box-shadow: var(--ring); }
.btn.primary { border-color: transparent; background: linear-gradient(135deg, var(--accent-600), var(--accent-500)); color: #fff; }
.btn.ghost { background: transparent; }
.btn.small { padding: 8px 12px; border-radius: 10px; font-size: 14px; }

/* Hero */
.hero { position: relative; padding: clamp(56px, 8vw, 100px) 0 clamp(36px, 6vw, 64px); }
.hero-inner {
  display: grid; grid-template-columns: 1.4fr 1fr; align-items: center; gap: clamp(18px, 4vw, 48px);
}
.hero-copy h1 { font-size: clamp(30px, 4.8vw, 54px); line-height: 1.15; margin: 0 0 12px; }
.hero-copy .accent {
  background: linear-gradient(135deg, var(--accent-500), #58e1ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { font-size: clamp(16px, 2vw, 20px); color: var(--fg-200); margin: 0 0 22px; }
.cta { display: flex; gap: 14px; flex-wrap: wrap; }

.status-line { margin-top: 10px; color: var(--fg-200); min-height: 1.4em; }

.hero-visual { display: grid; place-items: center; }
.orbital { position: relative; width: 320px; height: 320px; }
.orbit {
  position: absolute; inset: 0; border-radius: 50%;
  border: 1px dashed rgba(255,255,255,0.14);
  animation: spin 28s linear infinite;
}
.orbit.o2 { inset: 16px; animation-duration: 20s; opacity: 0.7; }
.orbit.o3 { inset: 32px; animation-duration: 12s; opacity: 0.45; }
.core { position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%); }
.hero-logo { width: 140px; height: 140px; filter: drop-shadow(0 18px 36px rgba(0,0,0,0.45)); }
@keyframes spin { to { transform: rotate(360deg); } }

/* Features */
.features { padding: 20px 0 8px; }
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; }
.card p { margin: 0; color: var(--fg-200); }

/* Projects */
.projects { padding: 36px 0; }
.projects h2 { margin: 0 0 16px; }
.projects-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px;
}
.link-card {
  position: relative; overflow: hidden; isolation: isolate;
  text-decoration: none; color: inherit; padding: 20px;
  border: 1px solid var(--card-border); border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  box-shadow: var(--shadow);
  transform-style: preserve-3d;
  transition: transform var(--transition-med), border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.link-card:hover, .link-card:focus-within { transform: translateY(-3px); border-color: rgba(255,255,255,0.28); box-shadow: 0 18px 42px rgba(0,0,0,0.4); }
.link-card .glow {
  position: absolute; inset: -20%; z-index: -1;
  background: radial-gradient(600px 240px at var(--mx, 50%) var(--my, 40%), var(--glow-a), transparent 60%),
              radial-gradient(460px 200px at calc(var(--mx, 50%) - 20%) calc(var(--my, 40%) + 10%), var(--glow-b), transparent 60%);
  transition: opacity var(--transition-fast);
  opacity: 0.85;
}
.project-header { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.project-icon {
  width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px;
  background: linear-gradient(135deg, rgba(43,160,247,0.25), rgba(88,225,255,0.25));
}
.project h3 { margin: 0; }
.project p { color: var(--fg-200); margin: 8px 0 16px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.ext { margin-left: 6px; opacity: 0.9; }

/* About */
.about { padding: 28px 0 64px; }
.about h2 { margin-top: 0; }
.about p { color: var(--fg-200); max-width: 70ch; }

/* Footer */
.site-footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(10,18,28,0.6), rgba(10,18,28,0.92));
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0; gap: 16px;
}
.footer-links a { color: var(--fg-100); text-decoration: none; margin-left: 16px; }
.footer-links a:hover { text-decoration: underline; }

/* Reveal animation */
[data-reveal] { opacity: 0; transform: translateY(8px); transition: opacity 420ms ease, transform 420ms ease; }
[data-reveal].reveal-in { opacity: 1; transform: translateY(0); }

/* Accessibility: reduced motion */
@media (prefers-reduced-motion: reduce) {
  .link-card, .btn, .orbit { transition: none !important; animation: none !important; }
}

/* Responsive */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}