/* ============================================================
   Aterut Software Solutions — blueprint theme
   Palette derived from drafting paper: navy ground, blueprint
   blue lines, paper-white "built" elements.
   ============================================================ */

:root {
  --ink:        #080B14;   /* drafting-navy ground */
  --ink-soft:   #0C1120;   /* elevated surface */
  --ink-line:   #121a2e;   /* hairline borders */
  --paper:      #EAF1FF;   /* "built" white */
  --muted:      #8A97B4;   /* secondary text */
  --muted-dim:  #5C6784;   /* tertiary / captions */
  --accent:     #4E8CFF;   /* blueprint blue */
  --accent-2:   #7FB0FF;   /* light blueprint blue */
  --accent-soft: rgba(78, 140, 255, 0.12);
  --grid:       rgba(90, 130, 210, 0.055);

  --maxw: 1120px;
  --gutter: clamp(20px, 5vw, 56px);

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "Space Mono", ui-monospace, monospace;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* page-wide faint blueprint grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(120% 80% at 50% 0%, #000 55%, transparent 100%);
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 1;
}

a { color: inherit; text-decoration: none; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0; letter-spacing: -0.02em; }

.mono { font-family: var(--font-mono); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--ink); padding: 10px 16px;
  border-radius: 0 0 var(--r-sm) 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ================= HEADER ================= */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(8, 11, 20, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ink-line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 34px; height: 34px; flex: none; }
.brand-mark.sm { width: 26px; height: 26px; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-family: var(--font-display); font-weight: 600; font-size: 19px; letter-spacing: -0.01em; }
.brand-sub { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.24em; color: var(--muted); margin-top: 3px; }

.nav { display: flex; gap: 30px; }
.nav a {
  font-size: 14.5px; color: var(--muted); font-weight: 500;
  position: relative; transition: color 0.25s var(--ease);
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 1.5px; background: var(--accent);
  transition: width 0.28s var(--ease);
}
.nav a:hover { color: var(--paper); }
.nav a:hover::after { width: 100%; }

.lang-switch { display: flex; align-items: center; gap: 4px; }
.lang-btn {
  background: none; border: none; cursor: pointer; padding: 4px 6px;
  font-family: var(--font-mono); font-size: 13px; color: var(--muted-dim);
  transition: color 0.2s var(--ease);
}
.lang-btn:hover { color: var(--paper); }
.lang-btn.is-active { color: var(--accent); }
.lang-sep { color: var(--ink-line); font-family: var(--font-mono); }

/* ================= HERO ================= */
.hero { position: relative; padding-top: clamp(56px, 9vw, 104px); padding-bottom: clamp(40px, 7vw, 80px); overflow: hidden; }
.grid-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(60% 55% at 78% 30%, rgba(78,140,255,0.16), transparent 70%),
    radial-gradient(50% 45% at 12% 8%, rgba(78,140,255,0.08), transparent 70%);
  pointer-events: none;
}
.hero-inner {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.hero-inner > * { min-width: 0; }
.hero-copy { max-width: 620px; }

.eyebrow {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.22em;
  color: var(--accent); margin: 0 0 26px;
}
.eyebrow::before {
  content: ""; display: inline-block; width: 26px; height: 1px;
  background: var(--accent); margin-right: 12px; vertical-align: middle;
  opacity: 0.7;
}

.hero-title {
  font-size: clamp(2.7rem, 6.4vw, 4.6rem);
  line-height: 1.02; letter-spacing: -0.035em; font-weight: 700;
  margin: 0;
}
.hero-title span { display: block; }
.hero-title .accent-line { color: var(--paper); }
.hero-title .dot { color: var(--accent); }

.hero-lead {
  color: var(--muted); font-size: clamp(1rem, 1.6vw, 1.18rem);
  margin: 28px 0 0; max-width: 33em; overflow-wrap: break-word;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: var(--r-sm);
  font-weight: 600; font-size: 15px; letter-spacing: 0.01em;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
  will-change: transform;
}
.btn-primary { background: var(--accent); color: #05101f; }
.btn-primary:hover { background: var(--accent-2); transform: translateY(-2px); }
.btn-ghost { border: 1px solid var(--ink-line); color: var(--paper); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-2); transform: translateY(-2px); }

/* --- hero signature: blueprint --- */
.hero-signature { position: relative; }
.sig-labels {
  display: flex; align-items: center; gap: 12px; justify-content: center;
  margin-bottom: 14px; font-size: 12px; letter-spacing: 0.2em;
}
.sig-tag { color: var(--muted-dim); padding: 3px 10px; border: 1px solid var(--ink-line); border-radius: 100px; }
.sig-tag.is-built { color: var(--accent); border-color: rgba(78,140,255,0.4); }
.sig-arrow { color: var(--muted-dim); }

.blueprint { width: 100%; height: auto; display: block; }
.blueprint .reg { stroke: var(--muted-dim); stroke-width: 1.4; opacity: 0.5; fill: none; }
.blueprint .draw {
  stroke: var(--accent); stroke-width: 1.6; fill: none; stroke-linecap: round;
  opacity: 0.9;
}
.blueprint .frame { stroke-width: 2; opacity: 1; }
.blueprint .node { fill: none; }
.blueprint .dim { stroke: var(--muted-dim); stroke-width: 1.2; opacity: 0.45; }
.blueprint .build {
  fill: var(--accent); opacity: 0.9;
}
.blueprint .build.b1 { fill: var(--accent); }
.blueprint .build.b2 { fill: rgba(78,140,255,0.35); }

/* draw + build animation */
.blueprint .draw, .blueprint .frame {
  stroke-dasharray: 1200; stroke-dashoffset: 1200;
  animation: draw 1.5s var(--ease) forwards;
}
.blueprint .frame { animation-delay: 0.15s; }
.blueprint .node { animation-delay: 0.9s; }
.blueprint .build { opacity: 0; transform-box: fill-box; transform-origin: center; transform: scale(0.9); animation: pop 0.6s var(--ease) forwards; }
.blueprint .build.b1 { animation-delay: 1.15s; }
.blueprint .build.b2 { animation-delay: 1.35s; }

@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes pop { to { opacity: 0.9; transform: scale(1); } }

.scroll-hint {
  display: flex; align-items: center; gap: 12px;
  margin: clamp(30px,5vw,60px) auto 0; max-width: var(--maxw);
  padding-inline: var(--gutter);
  font-size: 11px; letter-spacing: 0.24em; color: var(--muted-dim);
}
.scroll-line { flex: 1; height: 1px; background: linear-gradient(90deg, var(--muted-dim), transparent); max-width: 120px; }

/* ================= SECTIONS ================= */
.section { padding-block: clamp(72px, 11vw, 132px); position: relative; }
.section-alt { background: var(--ink-soft); border-block: 1px solid var(--ink-line); }

.section-head { max-width: 780px; margin-bottom: clamp(40px, 6vw, 64px); }
.label {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; letter-spacing: 0.22em; color: var(--accent);
  margin: 0 0 22px;
}
.label.center { justify-content: center; width: 100%; }
.tick { width: 8px; height: 8px; border: 1.5px solid var(--accent); border-radius: 2px; display: inline-block; }

.section-title { font-size: clamp(1.6rem, 3.4vw, 2.5rem); line-height: 1.12; letter-spacing: -0.025em; max-width: 20ch; }
.section-lead { color: var(--muted); margin: 20px 0 0; max-width: 52ch; font-size: 1.05rem; }

/* --- capability cards --- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--ink-line); border: 1px solid var(--ink-line); border-radius: var(--r-md); overflow: hidden; }
.card {
  background: var(--ink); padding: 32px 28px 36px;
  display: flex; flex-direction: column; gap: 12px; min-height: 230px;
  transition: background 0.3s var(--ease);
  position: relative;
}
.card:hover { background: #0b1226; }
.card-index { color: var(--accent); font-size: 13px; letter-spacing: 0.1em; margin-bottom: 8px; }
.card h3 { font-size: 1.24rem; letter-spacing: -0.01em; }
.card p { color: var(--muted); font-size: 0.96rem; margin: 0; line-height: 1.6; }

/* --- process steps --- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; counter-reset: none; }
.step {
  display: grid; grid-template-columns: 88px 1fr; gap: clamp(20px, 4vw, 48px);
  padding: 34px 0; border-top: 1px solid var(--ink-line); align-items: start;
}
.step:last-child { border-bottom: 1px solid var(--ink-line); }
.step-num { font-size: 15px; color: var(--accent); letter-spacing: 0.1em; padding-top: 6px; position: relative; }
.step-num::after { content: ""; position: absolute; left: 2px; top: 34px; bottom: -20px; width: 1px; background: linear-gradient(var(--ink-line), transparent); }
.step:last-child .step-num::after { display: none; }
.step-body h3 { font-size: 1.4rem; margin-bottom: 10px; }
.step-body p { color: var(--muted); margin: 0; max-width: 62ch; }

/* --- project / odala --- */
.project {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(28px, 4vw, 56px);
  border: 1px solid var(--ink-line); border-radius: var(--r-lg);
  padding: clamp(28px, 4vw, 48px);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(78,140,255,0.07), transparent 60%),
    var(--ink-soft);
  position: relative; overflow: hidden;
}
.project::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(90deg, var(--grid) 1px, transparent 1px), linear-gradient(var(--grid) 1px, transparent 1px);
  background-size: 40px 40px; opacity: 0.6; pointer-events: none;
  mask-image: radial-gradient(80% 80% at 90% 10%, #000, transparent 70%);
}
.project-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 18px; }
.project-name { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -0.03em; font-weight: 700; }
.project-status { font-size: 11px; letter-spacing: 0.18em; color: var(--accent); }
.project-desc { color: var(--muted); font-size: 1.05rem; margin: 0 0 24px; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 9px; margin: 0; padding: 0; }
.tag {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em;
  padding: 6px 13px; border: 1px solid var(--ink-line); border-radius: 100px; color: var(--muted);
}
.project-specs { margin: 0; display: flex; flex-direction: column; gap: 20px; align-self: center; }
.project-specs > div { display: flex; flex-direction: column; gap: 5px; }
.project-specs dt { font-size: 10.5px; letter-spacing: 0.2em; color: var(--muted-dim); margin: 0; }
.project-specs dd { margin: 0; font-size: 1rem; color: var(--paper); }

/* --- about --- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 80px); align-items: start; }
.about-copy { position: sticky; top: 100px; }
.values { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.value { padding: 26px 0; border-top: 1px solid var(--ink-line); display: grid; grid-template-columns: 54px 1fr; column-gap: 16px; row-gap: 6px; align-items: start; }
.value:last-child { border-bottom: 1px solid var(--ink-line); }
.value-k { grid-column: 1; grid-row: 1 / span 2; color: var(--accent); font-size: 13px; padding-top: 4px; }
.value h3 { grid-column: 2; grid-row: 1; font-size: 1.2rem; }
.value p { grid-column: 2; grid-row: 2; color: var(--muted); margin: 0; font-size: 0.97rem; }

/* --- contact --- */
.contact { text-align: center; }
.contact-inner { max-width: 900px; margin: 0 auto; }
.contact-title {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.9rem, 4.6vw, 3.2rem); line-height: 1.08; letter-spacing: -0.03em;
  margin: 0 auto 44px; max-width: 18ch;
}
.contact-title span { display: block; }
.contact-title .accent { color: var(--accent); }
.contact-methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; text-align: left; }
.contact-card {
  border: 1px solid var(--ink-line); border-radius: var(--r-md);
  padding: 26px 24px; background: var(--ink-soft);
  display: flex; flex-direction: column; gap: 8px;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}
.contact-card:hover { transform: translateY(-4px); border-color: var(--accent); background: #0b1226; }
.cc-label { font-size: 10.5px; letter-spacing: 0.2em; color: var(--muted-dim); }
.cc-value { font-family: var(--font-display); font-size: 1.22rem; font-weight: 600; color: var(--paper); }
.cc-meta { font-size: 0.9rem; color: var(--muted); }

/* ================= FOOTER ================= */
.site-footer { border-top: 1px solid var(--ink-line); padding-block: 34px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .mono { font-size: 10.5px; letter-spacing: 0.18em; color: var(--muted-dim); }
.footer-copy { font-size: 11px; letter-spacing: 0.1em; color: var(--muted-dim); margin: 0; }

/* ================= REVEAL ANIMATION ================= */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal.is-in { opacity: 1; transform: none; }

/* ================= RESPONSIVE ================= */
@media (max-width: 940px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-signature { max-width: 420px; margin-top: 8px; order: 2; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .project { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-copy { position: static; }
  .contact-methods { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav { display: none; }
}
@media (max-width: 540px) {
  body { font-size: 16px; }
  .cards { grid-template-columns: 1fr; }
  .brand-sub { display: none; }
  .step { grid-template-columns: 54px 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .eyebrow { letter-spacing: 0.16em; font-size: 11.5px; }
  .label { letter-spacing: 0.16em; }
}

/* ================= REDUCED MOTION ================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-delay: 0ms !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .blueprint .draw, .blueprint .frame { stroke-dashoffset: 0; }
  .blueprint .build { opacity: 0.9; transform: none; }
}