:root {
  --bg: #050b1f;
  --bg-2: #081433;
  --card: rgba(16, 32, 72, .55);
  --line: rgba(120, 170, 255, .14);
  --text: #e8f0ff;
  --muted: #9fb0cf;
  --blue: #2f7bff;
  --mint: #34e5a5;
  --cyan: #5fd8ff;
  --grad: linear-gradient(100deg, var(--blue), var(--cyan) 55%, var(--mint));
  --radius: 18px;
  --head: "Sora", "Noto Sans JP", "Noto Sans KR", "Noto Sans Thai", system-ui, sans-serif;
  --body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--head); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.02em; }
h1 { font-size: clamp(2.4rem, 5.4vw, 4.2rem); font-weight: 700; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); font-weight: 600; }
h3 { font-size: 1.2rem; font-weight: 600; }
p { margin: 0 0 1em; }

.container { width: min(1180px, 100% - 32px); margin-inline: auto; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.eyebrow { color: var(--mint); font-weight: 600; font-size: .85rem; letter-spacing: .12em; text-transform: uppercase; margin-bottom: .9em; }
.lead { color: var(--muted); font-size: 1.12rem; max-width: 60ch; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); display: inline-block; box-shadow: 0 0 10px var(--mint); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  padding: .85em 1.5em; border-radius: 999px; font-weight: 600; border: 1px solid transparent;
  cursor: pointer; font: 600 1rem var(--body);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--grad); color: #04102a; box-shadow: 0 8px 30px -8px rgba(52, 229, 165, .55); }
.btn-primary:hover { box-shadow: 0 10px 40px -6px rgba(52, 229, 165, .75); }
.btn-ghost { border-color: var(--line); background: rgba(255,255,255,.03); color: var(--text); }
.btn-ghost:hover { background: rgba(255,255,255,.08); }
.btn-sm { padding: .55em 1.1em; font-size: .9rem; }

/* Nav */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(5, 11, 31, .6); border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-color: var(--line); background: rgba(5, 11, 31, .85); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font: 600 1.1rem var(--head); }
.brand b { font-weight: 400; color: var(--muted); margin-left: 4px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--muted); font-size: .95rem; transition: color .2s; }
.nav-links a:hover { color: var(--text); }
.nav-right { display: flex; align-items: center; gap: 10px; }

.lang { position: relative; }
.lang-btn {
  display: flex; align-items: center; gap: 6px; background: transparent; color: var(--text);
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; cursor: pointer; font: 600 .85rem var(--body);
}
.lang-menu {
  position: absolute; right: 0; top: calc(100% + 8px); list-style: none; margin: 0; padding: 6px;
  background: #0b1838; border: 1px solid var(--line); border-radius: 12px; min-width: 180px;
  opacity: 0; transform: translateY(-6px) scale(.98); transform-origin: top right; pointer-events: none;
  transition: opacity .15s ease, transform .15s ease; box-shadow: 0 20px 50px rgba(0,0,0,.4);
}
.lang.open .lang-menu { opacity: 1; transform: none; pointer-events: auto; }
.lang-menu a {
  display: block; color: var(--text); padding: 9px 12px;
  border-radius: 8px; cursor: pointer; font: .95rem var(--body);
}
.lang-menu a:hover, .lang-menu a.active { background: rgba(95, 216, 255, .1); color: var(--mint); }

.menu-btn { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; position: relative; }
.menu-btn span { position: absolute; left: 10px; right: 10px; height: 2px; background: var(--text); transition: transform .25s; }
.menu-btn span:first-child { top: 15px; }
.menu-btn span:last-child { top: 23px; }
.nav.menu-open .menu-btn span:first-child { transform: translateY(4px) rotate(45deg); }
.nav.menu-open .menu-btn span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* Hero */
.hero { position: relative; padding: 140px 0 60px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(600px 400px at 15% 20%, rgba(47, 123, 255, .25), transparent 70%),
    radial-gradient(500px 400px at 85% 40%, rgba(52, 229, 165, .14), transparent 70%);
}
#net { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0 22px; }
.hero-note { color: var(--muted); font-size: .9rem; display: flex; align-items: center; gap: 10px; }

/* Chat demo */
.chat {
  background: rgba(9, 20, 50, .82); border: 1px solid var(--line); border-radius: 22px;
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .6), 0 0 0 1px rgba(95,216,255,.05), 0 0 80px -30px rgba(52,229,165,.4);
  display: flex; flex-direction: column; height: 520px; overflow: hidden; backdrop-filter: blur(10px);
}
.chat-head { display: flex; gap: 12px; align-items: center; padding: 16px 18px; border-bottom: 1px solid var(--line); }
.chat-head small { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: .8rem; }
.chat-head .dot { width: 6px; height: 6px; }
.chat-body { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 10px; scroll-behavior: smooth; }
.msg {
  max-width: 85%; padding: 10px 14px; border-radius: 16px; font-size: .94rem; line-height: 1.5;
  animation: pop .25s ease-out both;
}
.msg.bot { background: rgba(255,255,255,.06); border: 1px solid var(--line); border-bottom-left-radius: 4px; align-self: flex-start; }
.msg.user { background: var(--grad); color: #04102a; font-weight: 500; border-bottom-right-radius: 4px; align-self: flex-end; }
.msg .btn { margin-top: 10px; padding: .5em 1em; font-size: .88rem; }
.typing { display: inline-flex; gap: 4px; align-items: center; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .15s; }
.typing i:nth-child(3) { animation-delay: .3s; }
.chat-chips { display: flex; gap: 8px; padding: 0 18px 12px; overflow-x: auto; scrollbar-width: none; }
.chat-chips button {
  flex: none; background: transparent; color: var(--cyan); border: 1px solid rgba(95,216,255,.35);
  border-radius: 999px; padding: 6px 12px; font: 500 .82rem var(--body); cursor: pointer; transition: background .2s;
}
.chat-chips button:hover { background: rgba(95,216,255,.1); }
.chat-input { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--line); }
.chat-input input {
  flex: 1; min-width: 0; background: rgba(255,255,255,.05); border: 1px solid var(--line); color: var(--text);
  border-radius: 999px; padding: 10px 16px; font: .95rem var(--body); outline: none;
}
.chat-input input:focus { border-color: rgba(95,216,255,.5); }
.chat-input button {
  width: 42px; height: 42px; flex: none; border-radius: 50%; border: 0; background: var(--grad); color: #04102a; cursor: pointer;
  display: grid; place-items: center;
}

@keyframes pop { from { opacity: 0; transform: translateY(6px) scale(.98); } }
@keyframes blink { 0%, 80%, 100% { opacity: .3; } 40% { opacity: 1; } }

.stack { position: relative; margin-top: 72px; text-align: center; }
.stack p { color: var(--muted); font-size: .85rem; margin-bottom: 14px; }
.stack ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 28px; }
.stack li { font: 600 1rem var(--head); color: #6f83a8; }

/* Sections */
.section { padding: 110px 0; position: relative; }
.section-head { margin-bottom: 48px; }

.card {
  position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; overflow: hidden; transition: border-color .3s, transform .3s;
}
.card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(95, 216, 255, .1), transparent 60%);
}
.card:hover { border-color: rgba(95, 216, 255, .3); }
.card:hover::before { opacity: 1; }
.card p { color: var(--muted); }

.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card-big { grid-column: span 2; grid-row: span 2; display: flex; flex-direction: column; }
.icon {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(47,123,255,.22), rgba(52,229,165,.18)); border: 1px solid var(--line);
}
.icon svg { width: 22px; height: 22px; fill: none; stroke: var(--mint); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.tags { list-style: none; padding: 0; margin: 0 0 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { font-size: .8rem; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--cyan); }
.mini-chat {
  margin-top: auto; display: flex; flex-direction: column; gap: 8px; padding: 18px; border-radius: 14px;
  background: rgba(3, 9, 26, .6); border: 1px solid var(--line);
}
.mini-chat .b { max-width: 75%; padding: 8px 12px; border-radius: 12px; font-size: .88rem; }
.mini-chat .in { background: rgba(255,255,255,.07); align-self: flex-start; }
.mini-chat .out { background: rgba(52,229,165,.16); color: #c9fbe9; align-self: flex-end; }

.work-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.work-grid .work { grid-column: span 2; }
.work-grid .work:nth-child(4), .work-grid .work:nth-child(5) { grid-column: span 3; }
.work .tag { color: var(--mint); font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; margin-bottom: .6em; }
.work h3 { font-size: 1.3rem; }
.work .link { color: var(--cyan); font-weight: 600; font-size: .92rem; }
.work .link:hover { text-decoration: underline; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: s; }
.steps li { padding: 26px; border-top: 2px solid var(--line); position: relative; }
.steps li::before { content: ""; position: absolute; top: -2px; left: 0; width: 40px; height: 2px; background: var(--grad); }
.steps .num { font: 700 .9rem var(--head); color: var(--mint); display: block; margin-bottom: 12px; }
.steps p { color: var(--muted); }

.about { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-img img { height: auto; border-radius: var(--radius); border: 1px solid var(--line); }
.checks { list-style: none; padding: 0; margin: 24px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.checks li { padding-left: 28px; position: relative; }
.checks li::before {
  content: ""; position: absolute; left: 0; top: .35em; width: 16px; height: 16px; border-radius: 50%;
  background: var(--grad); -webkit-mask: radial-gradient(circle, #000 35%, transparent 37%); mask: radial-gradient(circle, #000 35%, transparent 37%);
  box-shadow: 0 0 0 3px rgba(52,229,165,.25);
}

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-list { margin: 30px 0 0; display: grid; gap: 18px; }
.contact-list dt { color: var(--muted); font-size: .85rem; }
.contact-list dd { margin: 2px 0 0; font: 600 1.1rem var(--head); }
.contact-list a:hover { color: var(--mint); }
.form { display: grid; gap: 16px; }
.form label { display: grid; gap: 6px; font-size: .9rem; color: var(--muted); }
.form input, .form select, .form textarea {
  background: rgba(3, 9, 26, .6); border: 1px solid var(--line); color: var(--text); border-radius: 10px;
  padding: 12px 14px; font: 1rem var(--body); outline: none; transition: border-color .2s;
}
.form select option { background: #0b1838; }
.form input:focus, .form select:focus, .form textarea:focus { border-color: rgba(95,216,255,.55); }

.footer { border-top: 1px solid var(--line); padding: 40px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; }
.footer p { color: var(--muted); font-size: .9rem; margin: 10px 0 0; }

.wa-float {
  position: fixed; right: 20px; bottom: 20px; z-index: 40; width: 56px; height: 56px; border-radius: 50%;
  background: #25d366; color: #fff; display: grid; place-items: center; box-shadow: 0 10px 30px rgba(37,211,102,.4);
  transition: transform .2s;
}
.wa-float:hover { transform: scale(1.06); }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 980px) {
  .hero-grid, .about, .contact { grid-template-columns: 1fr; }
  .bento { grid-template-columns: 1fr 1fr; }
  .card-big { grid-column: span 2; grid-row: auto; }
  .work-grid { grid-template-columns: 1fr 1fr; }
  .work-grid .work, .work-grid .work:nth-child(4), .work-grid .work:nth-child(5) { grid-column: auto; }
  .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  .menu-btn { display: block; }
  .nav-cta { display: none; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 0; padding: 8px 16px 16px;
    background: #050b1f; border-bottom: 1px solid var(--line);
    opacity: 0; transform: translateY(-8px); pointer-events: none; transition: opacity .2s, transform .2s;
  }
  .nav-links a { padding: 12px 0; font-size: 1.05rem; }
  .nav.menu-open .nav-links { opacity: 1; transform: none; pointer-events: auto; }
}
@media (max-width: 600px) {
  .hero { padding-top: 110px; }
  .section { padding: 80px 0; }
  .bento, .work-grid, .steps, .checks { grid-template-columns: 1fr; }
  .card-big { grid-column: auto; }
  .chat { height: 480px; }
  .brand b { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* Keep Japanese and Korean headings from breaking in the middle of words */
:lang(ja) :is(h1, h2, h3), :lang(ko) :is(h1, h2, h3) { word-break: auto-phrase; letter-spacing: 0; }
:lang(ko) :is(h1, h2, h3, p) { word-break: keep-all; }