/* =========================================================================
   NanoCore — black & white, futuristic, modern.
   Single stylesheet, no build step.
   ========================================================================= */

:root {
  --bg: #000000;
  --bg-1: #060708;
  --bg-2: #0b0d10;
  --panel: #0d0f13;
  --panel-2: #121419;
  --line: rgba(255, 255, 255, 0.12);
  --line-soft: rgba(255, 255, 255, 0.07);
  --fg: #ffffff;
  --fg-dim: rgba(255, 255, 255, 0.72);
  --muted: rgba(255, 255, 255, 0.50);
  --faint: rgba(255, 255, 255, 0.30);
  --glow: rgba(255, 255, 255, 0.55);

  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", monospace;

  --maxw: 1180px;
  --radius: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* ambient grid + glow background ----------------------------------------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 75% -10%, rgba(255, 255, 255, 0.08), transparent 60%),
    radial-gradient(700px 600px at 0% 100%, rgba(255, 255, 255, 0.05), transparent 60%),
    var(--bg);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  opacity: 0.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
::selection { background: #fff; color: #000; }

/* layout ------------------------------------------------------------------ */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; position: relative; }
.section--tight { padding: 72px 0; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--fg));
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.08; letter-spacing: -0.01em; }
h2.section-title { font-size: clamp(28px, 4.4vw, 46px); margin-bottom: 18px; }
.section-lead { color: var(--fg-dim); max-width: 640px; font-size: 17px; }

/* buttons ----------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: all 0.35s var(--ease);
  position: relative;
}
.btn:hover { border-color: #fff; box-shadow: 0 0 0 1px #fff, 0 0 28px rgba(255,255,255,0.18); transform: translateY(-2px); }
.btn--solid { background: #fff; color: #000; border-color: #fff; }
.btn--solid:hover { background: #e9e9e9; box-shadow: 0 0 32px rgba(255,255,255,0.35); }
.btn .arrow { transition: transform 0.35s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ===================== NAVBAR ===================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5, 6, 8, 0.72);
  backdrop-filter: blur(16px) saturate(120%);
  -webkit-backdrop-filter: blur(16px) saturate(120%);
  border-bottom: 1px solid var(--line-soft);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.nav__brand { display: flex; align-items: center; gap: 12px; }
.nav__brand img { height: 30px; width: auto; }
.nav__brand .wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.18em;
  font-size: 16px;
  text-transform: uppercase;
}
.nav__links { display: flex; align-items: center; gap: 8px; }
.nav__links a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 10px 14px;
  border-radius: 8px;
  transition: color 0.25s, background 0.25s;
  position: relative;
}
.nav__links a:hover { color: #fff; }
.nav__links a.active { color: #fff; }
.nav__links a.active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 1px;
  background: linear-gradient(90deg, transparent, #fff, transparent);
}
.nav__cta { margin-left: 10px; }
.nav__toggle { display: none; background: none; border: 0; cursor: pointer; width: 40px; height: 40px; position: relative; }
.nav__toggle span { position: absolute; left: 9px; right: 9px; height: 1.5px; background: #fff; transition: 0.3s var(--ease); }
.nav__toggle span:nth-child(1) { top: 14px; }
.nav__toggle span:nth-child(2) { top: 20px; }
.nav__toggle span:nth-child(3) { top: 26px; }
.nav.open .nav__toggle span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav.open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.open .nav__toggle span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* ===================== HERO ===================== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: 76px; overflow: hidden; }
.hero__grid-glow {
  position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(680px 420px at 70% 35%, rgba(255,255,255,0.10), transparent 70%);
  pointer-events: none;
}
.hero__inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; width: 100%; }
.hero h1 { font-size: clamp(40px, 7vw, 86px); line-height: 1.0; margin-bottom: 24px; }
.hero h1 .grad { background: linear-gradient(180deg, #fff 30%, rgba(255,255,255,0.45)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: clamp(16px, 1.9vw, 20px); color: var(--fg-dim); max-width: 560px; margin-bottom: 36px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__stats { display: flex; gap: 40px; margin-top: 52px; flex-wrap: wrap; }
.hero__stat .n { font-family: var(--font-display); font-size: 30px; font-weight: 600; }
.hero__stat .l { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }

/* rotating hex emblem visual */
.hero__visual { display: flex; align-items: center; justify-content: center; position: relative; }
.hex-stage { position: relative; width: min(420px, 80%); aspect-ratio: 1; }
.hex-stage img { position: absolute; inset: 0; margin: auto; width: 56%; filter: drop-shadow(0 0 40px rgba(255,255,255,0.25)); animation: float 6s ease-in-out infinite; }
.hex-ring {
  position: absolute; inset: 0; border: 1px solid var(--line); border-radius: 50%;
  animation: spin 28s linear infinite;
}
.hex-ring::before { content: ""; position: absolute; top: -3px; left: 50%; width: 6px; height: 6px; background: #fff; border-radius: 50%; box-shadow: 0 0 14px #fff; }
.hex-ring.r2 { inset: 14%; animation-duration: 20s; animation-direction: reverse; border-style: dashed; opacity: 0.5; }
.hex-ring.r3 { inset: 28%; animation-duration: 36s; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float { 0%,100% { transform: translateY(-6px); } 50% { transform: translateY(6px); } }

.scroll-hint { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--faint); display: flex; flex-direction: column; align-items: center; gap: 8px; }
.scroll-hint .line { width: 1px; height: 36px; background: linear-gradient(var(--fg), transparent); animation: drop 2s ease-in-out infinite; }
@keyframes drop { 0%,100% { opacity: 0.2; transform: scaleY(0.6); } 50% { opacity: 1; transform: scaleY(1); } }

/* ===================== CARDS / GRID ===================== */
.grid { display: grid; gap: 20px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-1));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 30px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease);
}
.card::after {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); padding: 1px;
  background: linear-gradient(140deg, rgba(255,255,255,0.4), transparent 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity 0.4s var(--ease); pointer-events: none;
}
.card:hover { transform: translateY(-4px); border-color: var(--line); }
.card:hover::after { opacity: 1; }
.card__icon {
  width: 46px; height: 46px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 11px; margin-bottom: 20px;
  font-family: var(--font-mono); color: #fff;
}
.card__icon svg { width: 22px; height: 22px; stroke: #fff; }
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }
.card .index { position: absolute; top: 22px; right: 26px; font-family: var(--font-mono); font-size: 12px; color: var(--faint); }

/* ===================== FEATURE / SOFTWARE ===================== */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-dim); border: 1px solid var(--line); border-radius: 999px; padding: 7px 14px; }

.showcase {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(180deg, var(--panel-2), var(--bg)); position: relative;
}
.showcase__bar { display: flex; align-items: center; gap: 8px; padding: 14px 18px; border-bottom: 1px solid var(--line-soft); }
.showcase__bar i { width: 11px; height: 11px; border-radius: 50%; border: 1px solid var(--line); display: inline-block; }
.showcase__bar span { font-family: var(--font-mono); font-size: 12px; color: var(--muted); margin-left: 8px; }
.showcase__body { padding: 36px; display: grid; gap: 16px; }
.showcase__row { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border: 1px solid var(--line-soft); border-radius: 10px; background: rgba(255,255,255,0.02); }
.showcase__row .meter { width: 120px; height: 6px; border-radius: 4px; background: rgba(255,255,255,0.1); overflow: hidden; }
.showcase__row .meter b { display: block; height: 100%; background: #fff; border-radius: 4px; }
.showcase__row .label { font-family: var(--font-mono); font-size: 13px; }
.showcase__row .pts { font-family: var(--font-display); font-weight: 600; }

/* ===================== STEPS / PROCESS ===================== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line-soft); border-radius: var(--radius); overflow: hidden; }
.step { padding: 30px; border-right: 1px solid var(--line-soft); position: relative; }
.step:last-child { border-right: 0; }
.step .num { font-family: var(--font-mono); font-size: 12px; color: var(--faint); letter-spacing: 0.2em; }
.step h4 { font-size: 18px; margin: 14px 0 8px; }
.step p { color: var(--muted); font-size: 14px; }

/* ===================== CTA BAND ===================== */
.cta-band {
  border: 1px solid var(--line); border-radius: 20px; padding: 64px 48px; text-align: center;
  background:
    radial-gradient(500px 240px at 50% 0%, rgba(255,255,255,0.10), transparent 70%),
    linear-gradient(180deg, var(--panel), var(--bg));
  position: relative; overflow: hidden;
}
.cta-band h2 { font-size: clamp(28px, 4.5vw, 48px); margin-bottom: 16px; }
.cta-band p { color: var(--fg-dim); max-width: 520px; margin: 0 auto 30px; }

/* ===================== CONTACT FORM ===================== */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.field input, .field textarea, .field select {
  background: var(--bg-1); border: 1px solid var(--line); border-radius: 10px;
  color: #fff; font-family: var(--font-body); font-size: 15px; padding: 14px 16px;
  transition: border-color 0.3s, box-shadow 0.3s; width: 100%;
}
.field textarea { resize: vertical; min-height: 140px; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: #fff; box-shadow: 0 0 0 1px #fff; }
.field input::placeholder, .field textarea::placeholder { color: var(--faint); }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }
.form-status { font-family: var(--font-mono); font-size: 13px; margin-top: 16px; min-height: 20px; }
.form-status.ok { color: #fff; }
.form-status.err { color: #ff9d9d; }

.contact-meta { display: grid; gap: 22px; }
.contact-meta .item { border-left: 1px solid var(--line); padding-left: 18px; }
.contact-meta .item .k { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.contact-meta .item .v { font-size: 17px; }

/* ===================== FOOTER ===================== */
.footer { border-top: 1px solid var(--line-soft); padding: 64px 0 36px; margin-top: 40px; }
.footer__top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer__brand img { height: 34px; margin-bottom: 16px; }
.footer__brand .slogan { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--fg-dim); margin-bottom: 14px; }
.footer__brand p { color: var(--muted); font-size: 14px; max-width: 320px; }
.footer__col h5 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; }
.footer__col a { display: block; color: var(--fg-dim); font-size: 14px; padding: 6px 0; transition: color 0.25s; }
.footer__col a:hover { color: #fff; }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 26px; border-top: 1px solid var(--line-soft); font-family: var(--font-mono); font-size: 12px; color: var(--faint); flex-wrap: wrap; gap: 12px; }

/* ===================== PAGE HEADER (interior pages) ===================== */
.page-head { padding: 150px 0 60px; position: relative; }
.page-head h1 { font-size: clamp(36px, 6vw, 68px); margin-bottom: 18px; }
.page-head p { color: var(--fg-dim); max-width: 600px; font-size: 18px; }

/* ===================== REVEAL ANIMATION ===================== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }

/* ===================== VALUES / LIST ===================== */
.value-list { display: grid; gap: 2px; border: 1px solid var(--line-soft); border-radius: var(--radius); overflow: hidden; }
.value-row { display: grid; grid-template-columns: 60px 1fr; gap: 20px; padding: 26px 28px; background: var(--bg-1); transition: background 0.3s; }
.value-row:hover { background: var(--panel); }
.value-row .vn { font-family: var(--font-mono); color: var(--faint); font-size: 14px; }
.value-row h4 { font-size: 19px; margin-bottom: 6px; }
.value-row p { color: var(--muted); font-size: 15px; }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 920px) {
  .hero__inner { grid-template-columns: 1fr; gap: 30px; }
  .hero__visual { order: -1; }
  .hex-stage { width: 260px; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .grid--3, .grid--4 { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step:nth-child(2) { border-right: 0; }
  .footer__top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .nav__links { position: fixed; inset: 76px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0; background: rgba(5,6,8,0.97); backdrop-filter: blur(20px); border-bottom: 1px solid var(--line); padding: 12px 24px 24px; transform: translateY(-12px); opacity: 0; pointer-events: none; transition: 0.3s var(--ease); }
  .nav.open .nav__links { transform: none; opacity: 1; pointer-events: auto; }
  .nav__links a { padding: 14px 8px; font-size: 14px; border-bottom: 1px solid var(--line-soft); }
  .nav__cta { margin: 12px 8px 0; }
  .nav__toggle { display: block; }
  .grid--3, .grid--4, .grid--2, .form-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: 0; border-bottom: 1px solid var(--line-soft); }
  .footer__top { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .hero__stats { gap: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}