:root {
  --blue: #1b5cff;
  --blue-dark: #1449cc;
  --yellow: #ffd23f;
  --ink: #0b1a3a;
  --text: #1e2a44;
  --muted: #5b6785;
  --line: #e3e7f0;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --max: 1120px;
  --radius: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Pretendard Variable", Pretendard, "Apple SD Gothic Neo", -apple-system, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ── header ─────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand img { height: 26px; width: auto; }
.nav { display: flex; gap: 28px; font-size: 14.5px; font-weight: 600; color: var(--muted); }
.nav a:hover { color: var(--ink); }
.nav .cta { color: var(--blue); }
@media (max-width: 720px) { .nav { display: none; } }

/* ── hero ───────────────────────────────── */
.hero {
  background: var(--blue);
  color: #fff;
  padding: 96px 0 88px;
  position: relative;
  overflow: hidden;
}
.hero .sq {
  position: absolute; width: 18px; height: 18px; background: var(--yellow);
}
.hero .sq.a { top: 72px; left: 24px; }
.hero .sq.b { right: 8%; bottom: 28px; width: 28px; height: 28px; opacity: .9; }
.hero h1 {
  font-size: clamp(30px, 4.6vw, 52px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 20px;
  max-width: 820px;
}
.hero p {
  font-size: clamp(16px, 1.6vw, 19px);
  max-width: 640px;
  margin: 0 0 36px;
  opacity: .92;
}
.btn {
  display: inline-block; padding: 14px 24px; border-radius: 10px; font-weight: 700; font-size: 15px;
  transition: transform .12s ease, background .12s ease;
}
.btn:active { transform: translateY(1px); }
.btn-yellow { background: var(--yellow); color: var(--ink); }
.btn-yellow:hover { background: #ffdb62; }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.55); color: #fff; margin-left: 10px; }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-dark); }

/* ── sections ───────────────────────────── */
section { padding: 88px 0; }
section.soft { background: var(--bg-soft); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--blue); text-transform: uppercase;
  margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 10px; height: 10px; background: var(--yellow); }
h2 {
  font-size: clamp(26px, 3.2vw, 36px); line-height: 1.25; letter-spacing: -0.02em;
  font-weight: 800; color: var(--ink); margin: 0 0 14px;
}
.lead { font-size: 17px; color: var(--muted); max-width: 720px; margin: 0 0 44px; }

/* ── services ───────────────────────────── */
.grid { display: grid; gap: 20px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid.cols-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; } }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 26px 24px;
}
.card h3 { font-size: 17.5px; margin: 0 0 8px; color: var(--ink); letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.65; }
.card .num {
  display: inline-block; font-size: 12px; font-weight: 800; color: var(--blue);
  letter-spacing: .1em; margin-bottom: 12px;
}

/* ── why ────────────────────────────────── */
.why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; }
@media (max-width: 800px) { .why { grid-template-columns: 1fr; gap: 28px; } }
.why h3 { font-size: 20px; margin: 0 0 10px; color: var(--ink); display: flex; align-items: center; gap: 12px; }
.why h3::before { content: ""; width: 12px; height: 12px; background: var(--yellow); flex: none; }
.why p { margin: 0; color: var(--muted); font-size: 15.5px; }

/* ── portfolio ──────────────────────────── */
.pf { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.pf .tag { font-size: 12.5px; color: var(--blue); font-weight: 700; margin-bottom: 8px; }
.pf h3 { font-size: 17px; margin: 0 0 8px; color: var(--ink); }
.pf p { margin: 0 0 12px; color: var(--muted); font-size: 14.5px; }
.pf .tech { font-size: 12.5px; color: var(--muted); opacity: .85; }

/* ── team / history ─────────────────────── */
.two { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; }
@media (max-width: 860px) { .two { grid-template-columns: 1fr; gap: 44px; } }
.team-list { list-style: none; padding: 0; margin: 0; }
.team-list li { padding: 16px 0; border-top: 1px solid var(--line); }
.team-list li:last-child { border-bottom: 1px solid var(--line); }
.team-list b { display: block; color: var(--ink); font-size: 15.5px; margin-bottom: 3px; }
.team-list span { color: var(--muted); font-size: 14.5px; }
.note { font-size: 14px; color: var(--muted); margin-top: 18px; }

.tl { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--line); }
.tl li { position: relative; padding: 0 0 22px 22px; }
.tl li::before {
  content: ""; position: absolute; left: -7px; top: 8px; width: 12px; height: 12px; background: var(--blue);
}
.tl li:first-child::before { background: var(--yellow); }
.tl time { display: block; font-size: 13px; font-weight: 800; color: var(--blue); letter-spacing: .04em; margin-bottom: 4px; }
.tl p { margin: 0; font-size: 14.5px; color: var(--text); }

/* ── contact ────────────────────────────── */
.contact { background: var(--ink); color: #fff; }
.contact h2 { color: #fff; }
.contact .lead { color: rgba(255,255,255,.75); }
.contact .mail { font-size: clamp(20px, 3vw, 30px); font-weight: 800; letter-spacing: -0.01em; }
.contact .mail a:hover { color: var(--yellow); }
.contact .sub { color: rgba(255,255,255,.7); font-size: 14.5px; margin-top: 8px; }

/* ── footer ─────────────────────────────── */
footer { padding: 28px 0; font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); }
footer .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }