/*
  Three2Four IT Consulting — Site Styles
  Palette: Indigo / Cyan accents
*/

/* Root tokens */
:root {
  --bg: #0e0f18;
  --panel: #121326;
  --text: #e7e9ff;
  --muted: #acb0d6;
  --brand: #8f88ff;
  --brand-strong: #5d55ff;
  --accent: #5ce1e6;
  --surface: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.12);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

/* Reset & base */
* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Inter, Ubuntu, Cantarell, Noto Sans, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 800px at 85% -10%, rgba(92,225,230,0.1), transparent 60%),
              radial-gradient(1000px 900px at -15% 20%, rgba(141,136,255,0.14), transparent 60%),
              var(--bg);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.skip-link {
  position: absolute; left: -999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus { left: 8px; top: 8px; width: auto; height: auto; padding: 8px 12px; background: var(--panel); border: 1px solid var(--border); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; backdrop-filter: saturate(160%) blur(8px); background: rgba(14,15,24,0.6); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.2px; }
.brand span { 
  background: linear-gradient(90deg, var(--brand), var(--accent)); 
  -webkit-background-clip: text; 
  background-clip: text; 
  color: transparent; 
  font-family: 'Courier New', 'Monaco', 'Menlo', 'Consolas', 'Roboto Mono', monospace;
  font-size: 2.5rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-shadow: 0 0 40px rgba(143, 136, 255, 0.3);
}

.nav-toggle { display: none; }
.nav-list { display: flex; gap: 20px; align-items: center; }
.nav-list a { color: var(--muted); }
.nav-list a:hover { color: var(--text); }

/* Hero */
.hero { padding: 72px 0 48px; }
.grid-two { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 36px; align-items: center; }
.hero-copy h1 { font-size: clamp(2rem, 2.6vw + 1rem, 3rem); line-height: 1.15; margin: 0 0 12px; }
.lead { color: var(--muted); font-size: 1.05rem; max-width: 56ch; }
.cta-group { display: flex; gap: 12px; margin-top: 18px; flex-wrap: wrap; }

.badges { list-style: none; padding: 0; margin: 22px 0 0; display: flex; gap: 10px; flex-wrap: wrap; }
.badges li { border: 1px solid var(--border); background: var(--surface); padding: 6px 10px; border-radius: 999px; color: var(--muted); font-size: 0.9rem; }

.hero-visual { position: relative; min-height: 320px; background: linear-gradient(180deg, rgba(95,85,255,0.1), rgba(92,225,230,0.06)); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.orb { position: absolute; border-radius: 50%; filter: blur(10px); opacity: 0.8; }
.orb-1 { width: 180px; height: 180px; background: radial-gradient(circle at 30% 30%, #8f88ff, transparent 70%); top: -30px; right: -20px; }
.orb-2 { width: 220px; height: 220px; background: radial-gradient(circle at 60% 60%, #5ce1e6, transparent 70%); bottom: -40px; left: -20px; }
.orb-3 { width: 120px; height: 120px; background: radial-gradient(circle at 50% 50%, #b1abff, transparent 70%); bottom: 20px; right: 30px; }
.gridlines { position: absolute; inset: 0; }

/* Sections */
.section { padding: 68px 0; }
.section-alt { background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent 20%); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: 1.8rem; margin: 0 0 8px; }
.section-lead { color: var(--muted); margin: 0 0 24px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 18px; box-shadow: var(--shadow); }
.card h3 { margin-top: 0; }
.card p { color: var(--muted); }
.card ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 18px; position: relative; }
.step-num { position: absolute; top: -12px; left: -12px; width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(135deg, var(--brand), var(--accent)); color: #0b0c16; display: grid; place-items: center; font-weight: 800; box-shadow: var(--shadow); }

.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.case { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 18px; }
.tags { list-style: none; padding: 0; margin: 10px 0 0; display: flex; gap: 8px; }
.tags li { font-size: 0.85rem; color: var(--muted); border: 1px dashed var(--border); padding: 4px 8px; border-radius: 999px; }

.pill-list { list-style: none; padding: 0; margin: 12px 0 0; display: flex; gap: 10px; flex-wrap: wrap; }
.pill-list li { border: 1px solid var(--border); background: var(--surface); padding: 8px 12px; border-radius: 999px; color: var(--muted); }

/* Buttons */
.btn { display: inline-block; padding: 10px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text); transition: transform 0.05s ease, background 0.2s ease, border-color 0.2s ease; }
.btn:hover { transform: translateY(-1px); border-color: rgba(255,255,255,0.2); }
.btn:active { transform: translateY(0); }
.btn-primary { background: linear-gradient(90deg, var(--brand-strong), var(--accent)); color: #0b0c16; border: none; font-weight: 700; }
.btn-ghost { background: transparent; }
.btn-small { padding: 8px 12px; font-size: 0.95rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: rgba(10,11,18,0.6); }
.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; padding: 18px 0; }
.brand-line { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); }
.footer-links { list-style: none; padding: 0; margin: 0; display: flex; gap: 14px; color: var(--muted); }
.copyright { color: var(--muted); margin: 0; grid-column: 1 / -1; text-align: center; font-size: 0.9rem; }

/* Nav responsive */
@media (max-width: 840px) {
  .grid-two { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-flex; align-items: center; gap: 6px; background: var(--surface); color: var(--text); border: 1px solid var(--border); padding: 8px 10px; border-radius: 8px; }
  .nav-list { position: absolute; right: 16px; top: 54px; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 10px; flex-direction: column; min-width: 180px; display: none; }
  .nav-list.open { display: flex; }
  .brand span { font-size: 2rem; }
}

/* Grids responsive */
@media (max-width: 980px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .cases { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .cards { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .cases { grid-template-columns: 1fr; }
  .brand span { font-size: 1.5rem; }
}