/* ============================================================
   Tephratec Solutions — Dark Futuristic AI Theme
   ============================================================ */

:root {
  --bg: #050810;
  --bg-2: #080d1a;
  --bg-3: #0b1222;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(148, 184, 255, 0.14);
  --border-strong: rgba(148, 184, 255, 0.28);
  --text: #e8eef8;
  --text-dim: #9fb0c9;
  --text-faint: #6b7a94;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --violet: #8b5cf6;
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
  --grad: linear-gradient(92deg, #22d3ee 0%, #3b82f6 50%, #8b5cf6 100%);
  --radius: 18px;
  --font-head: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(59, 130, 246, 0.4); }

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }

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

.container { width: min(1180px, 92%); margin: 0 auto; }

/* ---------- background decor ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(120, 160, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 30%, transparent 75%);
}
.bg-orbs { position: fixed; inset: 0; z-index: -3; pointer-events: none; overflow: hidden; }
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.35; }
.orb-1 { width: 560px; height: 560px; background: #1d4ed8; top: -220px; left: -140px; animation: drift 22s ease-in-out infinite alternate; }
.orb-2 { width: 460px; height: 460px; background: #0e7490; top: 30%; right: -180px; animation: drift 26s ease-in-out infinite alternate-reverse; }
.orb-3 { width: 420px; height: 420px; background: #6d28d9; bottom: -180px; left: 30%; opacity: 0.22; animation: drift 30s ease-in-out infinite alternate; }
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(60px, 40px) scale(1.12); }
}

/* ---------- header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  background: rgba(5, 8, 16, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 44px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--text-dim); transition: color 0.2s; position: relative; }
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
  background: var(--grad); border-radius: 2px;
}
.nav-cta { display: inline-flex; }
.menu-btn { display: none; background: none; border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; cursor: pointer; color: var(--text); }
.menu-btn svg { display: block; }

/* mobile nav */
.mobile-nav { display: none; flex-direction: column; gap: 4px; padding: 12px 4% 20px; border-top: 1px solid var(--border); background: rgba(5, 8, 16, 0.97); }
.mobile-nav a { padding: 11px 10px; border-radius: 10px; color: var(--text-dim); font-weight: 500; }
.mobile-nav a:hover, .mobile-nav a.active { background: var(--surface-2); color: #fff; }
.mobile-nav.open { display: flex; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: 15.5px;
  border: none; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  font-family: var(--font-body);
}
.btn-primary {
  background: var(--grad); color: #04101d;
  box-shadow: 0 8px 30px rgba(34, 211, 238, 0.28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(59, 130, 246, 0.45); }
.btn-ghost {
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--surface-2); transform: translateY(-2px); }
.btn-lg { padding: 16px 34px; font-size: 16.5px; }

/* ---------- hero ---------- */
.hero { padding: 170px 0 90px; position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: 999px; font-size: 13.5px; font-weight: 600;
  background: rgba(34, 211, 238, 0.08); border: 1px solid rgba(34, 211, 238, 0.3);
  color: var(--cyan); letter-spacing: 0.03em; text-transform: uppercase;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 1.8s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.hero h1 { font-size: clamp(2.3rem, 4.2vw, 3.25rem); margin: 22px 0 20px; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 1.16rem; color: var(--text-dim); max-width: 560px; }
.hero-actions { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }

.hero-stats { display: flex; gap: 30px; margin-top: 48px; flex-wrap: wrap; }
.stat h3 { font-size: 1.85rem; }
.stat h3 span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat p { color: var(--text-faint); font-size: 14px; margin-top: 2px; }

/* hero vision panel */
.vision-panel {
  position: relative; border-radius: 22px; border: 1px solid var(--border-strong);
  background: linear-gradient(160deg, rgba(14, 25, 48, 0.9), rgba(8, 13, 26, 0.95));
  padding: 22px; box-shadow: 0 30px 80px rgba(2, 6, 18, 0.7), inset 0 1px 0 rgba(255,255,255,0.06);
}
.vision-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.vision-head .cam { font-size: 12.5px; color: var(--text-faint); letter-spacing: 0.08em; text-transform: uppercase; }
.rec { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--red); font-weight: 700; }
.rec .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--red); animation: pulse 1.2s infinite; }
.belt {
  position: relative; height: 190px; border-radius: 14px; overflow: hidden;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,0.045) 0 46px, rgba(255,255,255,0.015) 46px 92px),
    linear-gradient(180deg, #0c1526, #080e1c);
  border: 1px solid var(--border);
}
.scanline {
  position: absolute; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 24px var(--cyan);
  animation: scan 3.6s ease-in-out infinite;
}
@keyframes scan { 0%, 100% { left: 6%; } 50% { left: 93%; } }
.item-box {
  position: absolute; border-radius: 8px; border: 2px solid var(--green);
  background: rgba(52, 211, 153, 0.08); width: 74px; height: 58px;
}
.item-box .tag {
  position: absolute; top: -24px; left: -2px; font-size: 10.5px; font-weight: 700;
  background: var(--green); color: #04120b; padding: 2px 8px; border-radius: 5px; white-space: nowrap;
  font-family: var(--font-body);
}
.item-box.defect { border-color: var(--red); background: rgba(248, 113, 113, 0.1); }
.item-box.defect .tag { background: var(--red); color: #1b0505; }
.vision-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 16px; }
.vm {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 14px;
}
.vm b { font-size: 1.25rem; font-family: var(--font-head); display: block; }
.vm.ok b { color: var(--green); }
.vm.bad b { color: var(--red); }
.vm.acc b { color: var(--cyan); }
.vm span { font-size: 11.5px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; }

/* ---------- sections ---------- */
section { padding: 88px 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker {
  font-size: 13px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 14px; display: block;
}
.section-head h2 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); margin-bottom: 16px; }
.section-head p { color: var(--text-dim); font-size: 1.06rem; }

/* ---------- cards ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 28px; transition: transform 0.25s, border-color 0.25s, background 0.25s;
  position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-6px); border-color: var(--border-strong); background: var(--surface-2); }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.14), rgba(139, 92, 246, 0.14));
  border: 1px solid var(--border-strong); margin-bottom: 20px; color: var(--cyan);
}
.card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 15px; }
.card .learn { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; font-size: 14.5px; font-weight: 600; color: var(--cyan); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

/* featured AI band */
.ai-band {
  border-radius: 26px; border: 1px solid rgba(34, 211, 238, 0.25);
  background:
    radial-gradient(900px 300px at 15% 0%, rgba(34, 211, 238, 0.1), transparent 60%),
    radial-gradient(700px 300px at 90% 100%, rgba(139, 92, 246, 0.12), transparent 60%),
    linear-gradient(160deg, #0a1424, #070c18);
  padding: 56px 54px; position: relative; overflow: hidden;
}
.ai-band .glowline {
  position: absolute; top: 0; left: 10%; right: 10%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}
.ai-band-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.ai-band h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); margin: 14px 0 16px; }
.ai-band p { color: var(--text-dim); }
.check-list { margin-top: 22px; display: grid; gap: 13px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--text-dim); font-size: 15.5px; }
.check-list .chk {
  flex: none; width: 22px; height: 22px; border-radius: 7px; margin-top: 2px;
  background: rgba(52, 211, 153, 0.12); border: 1px solid rgba(52, 211, 153, 0.4);
  display: flex; align-items: center; justify-content: center; color: var(--green);
}
.usecase-chips { display: flex; flex-wrap: wrap; gap: 11px; }
.chip {
  padding: 11px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
  background: var(--surface); border: 1px solid var(--border-strong); color: var(--text);
  display: inline-flex; align-items: center; gap: 8px;
}
.chip svg { color: var(--cyan); }

/* steps */
.step { text-align: left; }
.step-num {
  font-family: var(--font-head); font-size: 15px; font-weight: 700; color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.35); background: rgba(34, 211, 238, 0.07);
  width: 42px; height: 42px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}

/* why choose us */
.why-item { display: flex; gap: 18px; align-items: flex-start; }
.why-item .icon-sm {
  flex: none; width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.13), rgba(139, 92, 246, 0.13));
  border: 1px solid var(--border-strong); color: var(--cyan);
}
.why-item h3 { font-size: 1.08rem; margin-bottom: 6px; }
.why-item p { color: var(--text-dim); font-size: 14.8px; }

/* testimonials */
.quote-mark { font-family: var(--font-head); font-size: 3rem; line-height: 1; color: var(--cyan); opacity: 0.6; }
.t-card p { margin: 12px 0 20px; }
.t-person { display: flex; align-items: center; gap: 13px; }
.avatar {
  width: 44px; height: 44px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--grad); color: #04101d; font-weight: 700; font-family: var(--font-head); font-size: 15px;
}
.t-person b { display: block; font-size: 15px; }
.t-person span { font-size: 13px; color: var(--text-faint); }
.stars { color: var(--amber); letter-spacing: 2px; font-size: 14px; }

/* CTA */
.cta-box {
  text-align: center; border-radius: 26px; padding: 70px 40px;
  border: 1px solid var(--border-strong);
  background:
    radial-gradient(600px 200px at 50% 0%, rgba(59, 130, 246, 0.16), transparent 70%),
    linear-gradient(160deg, #0a1424, #070c18);
}
.cta-box h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); margin-bottom: 16px; }
.cta-box p { color: var(--text-dim); max-width: 560px; margin: 0 auto 32px; }

/* ---------- page hero (inner pages) ---------- */
.page-hero { padding: 165px 0 70px; text-align: center; }
.page-hero h1 { font-size: clamp(2.2rem, 4.4vw, 3.4rem); margin: 20px 0 18px; }
.page-hero p { color: var(--text-dim); font-size: 1.12rem; max-width: 700px; margin: 0 auto; }

/* ---------- use case cards (AI page) ---------- */
.uc-card .uc-visual {
  height: 150px; border-radius: 13px; margin-bottom: 22px; position: relative; overflow: hidden;
  border: 1px solid var(--border);
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,0.04) 0 40px, rgba(255,255,255,0.012) 40px 80px),
    linear-gradient(180deg, #0c1526, #080e1c);
}
.uc-emoji {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 46px; filter: drop-shadow(0 6px 18px rgba(34, 211, 238, 0.35));
}
.uc-badge {
  position: absolute; top: 10px; right: 10px; font-size: 10.5px; font-weight: 700;
  padding: 3px 9px; border-radius: 6px; letter-spacing: 0.04em;
  background: rgba(52, 211, 153, 0.15); border: 1px solid rgba(52, 211, 153, 0.45); color: var(--green);
}
.uc-badge.red { background: rgba(248, 113, 113, 0.13); border-color: rgba(248, 113, 113, 0.45); color: var(--red); }
.uc-scan {
  position: absolute; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 16px var(--cyan); animation: scan 4.2s ease-in-out infinite;
}

/* metrics band */
.metric-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.metric {
  text-align: center; padding: 30px 18px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
}
.metric b { font-size: 2.1rem; font-family: var(--font-head); display: block; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.metric span { color: var(--text-faint); font-size: 14px; }

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 54px; align-items: center; }
.about-grid p + p { margin-top: 16px; }
.about-grid p { color: var(--text-dim); }
.mv-card h3 { display: flex; align-items: center; gap: 12px; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 40px; align-items: start; }
.info-row { display: flex; gap: 16px; align-items: flex-start; padding: 18px 0; border-bottom: 1px solid var(--border); }
.info-row:last-child { border-bottom: none; }
.info-row .icon-sm {
  flex: none; width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.13), rgba(139, 92, 246, 0.13));
  border: 1px solid var(--border-strong); color: var(--cyan);
}
.info-row b { display: block; margin-bottom: 3px; font-size: 15.5px; }
.info-row p, .info-row a { color: var(--text-dim); font-size: 14.8px; }
.info-row a:hover { color: var(--cyan); }

.form-card { padding: 34px 32px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--text-dim); }
.field input, .field select, .field textarea {
  background: rgba(5, 8, 16, 0.6); border: 1px solid var(--border-strong); border-radius: 11px;
  padding: 13px 15px; color: var(--text); font-family: var(--font-body); font-size: 15px;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.14);
}
.field textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 13px; color: var(--text-faint); margin-top: 14px; }
.form-success {
  background: rgba(52, 211, 153, 0.1); border: 1px solid rgba(52, 211, 153, 0.4);
  color: var(--green); border-radius: 12px; padding: 14px 18px; margin-top: 16px; font-size: 14.5px;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border); margin-top: 40px;
  background: linear-gradient(180deg, rgba(8, 13, 26, 0.4), rgba(5, 8, 16, 0.9));
  padding: 64px 0 28px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 44px; }
.footer-grid h4 { font-size: 15.5px; margin-bottom: 18px; letter-spacing: 0.02em; }
.footer-grid ul { display: grid; gap: 11px; }
.footer-grid a, .footer-grid p { color: var(--text-dim); font-size: 14.5px; }
.footer-grid a:hover { color: var(--cyan); }
.footer-brand img { height: 46px; margin-bottom: 16px; }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 24px; display: flex;
  justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap;
  color: var(--text-faint); font-size: 13.5px;
}

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .hero-grid, .ai-band-grid, .about-grid { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .metric-band { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .menu-btn { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .metric-band { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .ai-band { padding: 40px 26px; }
  .form-grid { grid-template-columns: 1fr; }
  section { padding: 64px 0; }
  .hero { padding: 130px 0 60px; }
  .page-hero { padding: 130px 0 50px; }
}

/* form error note */
.form-error {
  background: rgba(248, 113, 113, 0.1); border: 1px solid rgba(248, 113, 113, 0.4);
  color: var(--red); border-radius: 12px; padding: 14px 18px; margin-top: 16px; font-size: 14.5px;
}