:root {
  --blue: #2f6bf2;
  --teal: #14c2b0;
  --grad: linear-gradient(120deg, #14c2b0 0%, #2a7cf0 55%, #2f6bf2 100%);
  --ink: #1c2430;
  --muted: #64748b;
  --bg-soft: #f5f8fc;
  --line: #e6ebf2;
  --radius: 14px;
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo",
    "Malgun Gothic", "Segoe UI", Roboto, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--ink); line-height: 1.6; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0);
  transition: background .25s, box-shadow .25s;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 1px 12px rgba(16, 34, 64, .08);
  backdrop-filter: blur(8px);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: .06em; color: #fff; transition: color .25s; }
.brand svg { display: block; }
.site-header.scrolled .brand { color: var(--ink); }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { color: rgba(255,255,255,.92); font-size: 15px; font-weight: 600; transition: color .25s; }
.main-nav a:hover { color: #fff; }
.site-header.scrolled .main-nav a { color: #48566a; }
.site-header.scrolled .main-nav a:hover { color: var(--blue); }
.nav-cta { display: flex; align-items: center; gap: 10px; }
.btn-chip {
  padding: 8px 16px; border-radius: 999px; font-size: 13.5px; font-weight: 700;
  border: 1.5px solid rgba(255,255,255,.85); color: #fff; transition: all .2s;
}
.btn-chip.solid { background: #fff; color: var(--blue); border-color: #fff; }
.btn-chip:hover { transform: translateY(-1px); }
.site-header.scrolled .btn-chip { border-color: var(--blue); color: var(--blue); }
.site-header.scrolled .btn-chip.solid { background: var(--blue); color: #fff; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; transition: all .25s; }
.site-header.scrolled .nav-toggle span { background: var(--ink); }

/* header variant for subpages (always solid) */
.site-header.solid { background: rgba(255,255,255,.97); box-shadow: 0 1px 12px rgba(16,34,64,.08); }
.site-header.solid .brand { color: var(--ink); }
.site-header.solid .main-nav a { color: #48566a; }
.site-header.solid .btn-chip { border-color: var(--blue); color: var(--blue); }
.site-header.solid .btn-chip.solid { background: var(--blue); color: #fff; }
.site-header.solid .nav-toggle span { background: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  min-height: 92vh; display: flex; align-items: center; justify-content: center;
  text-align: center; color: #fff; background: var(--grad); position: relative;
  padding: 120px 24px 80px;
}
.hero .eyebrow { font-size: 17px; font-weight: 600; opacity: .95; margin-bottom: 18px; letter-spacing: .01em; }
.hero h1 { font-size: clamp(40px, 7vw, 76px); line-height: 1.18; font-weight: 800; letter-spacing: -.01em; }
.hero .hero-cta {
  display: inline-block; margin-top: 40px; padding: 14px 36px; border: 1.5px solid rgba(255,255,255,.9);
  border-radius: 999px; color: #fff; font-weight: 700; font-size: 16px; transition: all .2s;
}
.hero .hero-cta:hover { background: #fff; color: var(--blue); }
.hero .waves { margin: 0 auto 26px; width: 96px; opacity: .95; }

/* ---------- Sections ---------- */
section { padding: 96px 0; }
.sec-label { color: var(--blue); font-weight: 800; font-size: 15px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 14px; }
.sec-title { font-size: clamp(26px, 3.6vw, 40px); font-weight: 800; line-height: 1.35; letter-spacing: -.01em; }
.sec-desc { color: var(--muted); margin-top: 14px; font-size: 17px; }
.center { text-align: center; }

/* Service cards */
.cards3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 40px 30px; text-align: center; transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(24, 60, 130, .12); }
.card .icon {
  width: 64px; height: 64px; margin: 0 auto 22px; border-radius: 18px;
  background: linear-gradient(135deg, rgba(20,194,176,.12), rgba(47,107,242,.12));
  display: flex; align-items: center; justify-content: center; color: var(--blue);
}
.card h3 { font-size: 14px; letter-spacing: .16em; text-transform: uppercase; color: var(--blue); font-weight: 800; margin-bottom: 12px; }
.card p { font-size: 18px; font-weight: 600; line-height: 1.55; }
.card small { display: block; margin-top: 10px; color: var(--muted); font-size: 14.5px; font-weight: 400; }

/* Process */
.process { background: var(--bg-soft); }
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; margin-top: 56px; }
.step {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 16px; text-align: center; position: relative;
}
.step .num { font-size: 13px; font-weight: 800; color: var(--teal); letter-spacing: .08em; }
.step h3 { font-size: 16.5px; font-weight: 700; margin-top: 8px; }
.step p { font-size: 13.5px; color: var(--muted); margin-top: 8px; line-height: 1.5; }
.step::after {
  content: "→"; position: absolute; right: -14px; top: 50%; transform: translateY(-50%);
  color: #b9c6d8; font-size: 15px;
}
.step:last-child::after { content: none; }

/* Stats band */
.stats { background: var(--grad); color: #fff; text-align: center; padding: 80px 0; }
.stats h2 { font-size: clamp(24px, 3.2vw, 36px); font-weight: 800; line-height: 1.4; }
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.stat .big { font-size: clamp(36px, 5vw, 56px); font-weight: 800; letter-spacing: -.01em; }
.stat .lbl { margin-top: 6px; font-size: 16px; opacity: .92; }

/* Fields */
.fields-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.field-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 28px;
  display: flex; align-items: center; gap: 18px; background: #fff;
  transition: transform .25s, box-shadow .25s;
}
.field-card:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(24,60,130,.1); }
.field-card .icon {
  flex: 0 0 52px; width: 52px; height: 52px; border-radius: 14px; color: var(--blue);
  background: linear-gradient(135deg, rgba(20,194,176,.12), rgba(47,107,242,.12));
  display: flex; align-items: center; justify-content: center;
}
.field-card h3 { font-size: 17.5px; font-weight: 700; line-height: 1.4; }

/* Languages & tools */
.langtools { background: var(--bg-soft); }
.lt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 56px; }
.lt-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px 32px; }
.lt-box h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.lt-box .sub { color: var(--muted); font-size: 15px; margin-bottom: 20px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 6px 14px; border-radius: 999px; background: var(--bg-soft);
  border: 1px solid var(--line); font-size: 13.5px; font-weight: 600; color: #3d4a5c;
}

/* ---------- Contact ---------- */
.contact { background: #fff; }
.contact-wrap { max-width: 760px; margin: 56px auto 0; }
.form-tabs { display: flex; gap: 10px; margin-bottom: 28px; }
.form-tabs button {
  flex: 1; padding: 13px; border-radius: 10px; border: 1.5px solid var(--line);
  background: #fff; font-family: var(--font); font-size: 15.5px; font-weight: 700; color: var(--muted); cursor: pointer;
  transition: all .2s;
}
.form-tabs button.active { border-color: var(--blue); color: var(--blue); background: rgba(47,107,242,.05); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .full { grid-column: 1 / -1; }
label.f-label { display: block; font-size: 14px; font-weight: 700; margin-bottom: 7px; color: #33404f; }
label.f-label .req { color: #e5484d; }
input[type="text"], input[type="email"], input[type="tel"], select, textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px;
  font-family: var(--font); font-size: 15px; color: var(--ink); background: #fff;
  transition: border-color .2s;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue); }
textarea { min-height: 140px; resize: vertical; }
.file-drop {
  border: 1.5px dashed #c3cfde; border-radius: 10px; padding: 20px; text-align: center;
  color: var(--muted); font-size: 14.5px; cursor: pointer; transition: border-color .2s, background .2s;
}
.file-drop:hover, .file-drop.drag { border-color: var(--blue); background: rgba(47,107,242,.04); }
.file-drop input { display: none; }
.file-note { font-size: 13px; color: #93a1b3; margin-top: 8px; }
.agree { display: flex; align-items: flex-start; gap: 10px; font-size: 14.5px; color: #43505f; }
.agree a { color: var(--blue); text-decoration: underline; }
.btn-submit {
  width: 100%; padding: 16px; border: 0; border-radius: 10px; background: var(--grad);
  color: #fff; font-family: var(--font); font-size: 17px; font-weight: 800; cursor: pointer; letter-spacing: .02em;
  transition: opacity .2s, transform .2s;
}
.btn-submit:hover { transform: translateY(-1px); }
.btn-submit:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.form-msg { margin-top: 16px; padding: 14px 16px; border-radius: 10px; font-size: 15px; display: none; }
.form-msg.ok { display: block; background: #edf9f1; color: #1a7f37; border: 1px solid #b7e6c4; }
.form-msg.err { display: block; background: #fdeeee; color: #c02c2c; border: 1px solid #f3c6c6; }

/* ---------- Footer ---------- */
.site-footer { background: #17202c; color: #aab6c5; padding: 64px 0 40px; font-size: 14.5px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.site-footer .brand { color: #fff; font-size: 18px; margin-bottom: 14px; }
.site-footer h4 { color: #e8edf3; font-size: 14px; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 12px; }
.site-footer a:hover { color: #fff; }
.foot-bottom { border-top: 1px solid #2a3542; margin-top: 44px; padding-top: 24px; font-size: 13px; color: #7f8c9d; color: #7f8c9d; display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }

/* ---------- Subpage hero ---------- */
.page-hero { background: var(--grad); color: #fff; text-align: center; padding: 150px 24px 70px; }
.page-hero h1 { font-size: clamp(30px, 4.5vw, 44px); font-weight: 800; }
.page-hero p { margin-top: 12px; font-size: 16.5px; opacity: .95; }

/* privacy page */
.doc { max-width: 820px; margin: 0 auto; padding: 60px 24px 100px; }
.doc h2 { font-size: 20px; margin: 36px 0 12px; }
.doc p, .doc li { font-size: 15px; color: #3d4a5c; margin-bottom: 8px; }
.doc ul { list-style: disc; padding-left: 22px; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.on { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .step::after { content: none; }
  .cards3, .fields-grid { grid-template-columns: 1fr 1fr; }
  .lt-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .main-nav {
    position: fixed; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column;
    gap: 0; padding: 10px 0; box-shadow: 0 12px 24px rgba(16,34,64,.12); display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { color: #33404f !important; padding: 13px 24px; width: 100%; text-align: center; }
  .nav-toggle { display: block; }
  .cards3, .fields-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .stat-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  section { padding: 72px 0; }
}