:root {
  --sea: #0a9ad6;
  --sea-deep: #0b5f9e;
  --aqua: #4fd1e8;
  --foam: #eaf7fc;
  --navy: #0b2a4a;
  --ink: #1d3447;
  --mute: #6b8296;
  --line: #d3e6f0;
  --disp: "Space Grotesk", "Noto Sans KR", sans-serif;
  --body: "Noto Sans KR", "Space Grotesk", sans-serif;
  --pad: max(clamp(20px, 5vw, 96px), calc((100% - 1800px) / 2));
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--body); color: var(--ink); background: #fff; line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
[hidden] { display: none !important; }

.eyebrow { font: 500 .78rem/1 var(--disp); letter-spacing: .28em; text-transform: uppercase; color: var(--sea); }

/* NAV */
.nav { position: fixed; inset: 0 0 auto; z-index: 10; display: flex; justify-content: space-between; align-items: center;
  padding: 18px clamp(16px, 2.2vw, 44px); background: rgba(255,255,255,.82); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.logo { font: 500 1rem var(--disp); letter-spacing: .18em; }
.logo b { color: var(--sea); font-weight: 700; }
.nav nav { display: flex; align-items: center; gap: clamp(14px, 3vw, 34px); font: 500 .85rem var(--disp); letter-spacing: .08em; text-transform: uppercase; }
.nav nav a:hover { color: var(--sea); }
.lang { display: flex; gap: 6px; align-items: center; color: var(--mute); }
.lang button { font: 700 .8rem var(--disp); color: var(--mute); padding: 2px 4px; }
.lang button.on { color: var(--sea); border-bottom: 2px solid var(--sea); }

/* HERO */
.hero { position: relative; min-height: 100vh; overflow: hidden; display: grid; place-items: center start; padding: 110px var(--pad) 150px;
  background: linear-gradient(170deg, #d9f3fb 0%, #9fdcf0 45%, #3bb6e2 100%); }
.hero-band { position: absolute; right: var(--pad); top: 0; bottom: 0; width: clamp(70px, 12vw, 170px);
  background: linear-gradient(180deg, var(--sea) 0%, var(--sea-deep) 100%); opacity: .92; }
.hero-line { position: absolute; left: -10%; top: 12%; width: 140%; height: 1px; background: rgba(255,255,255,.75);
  transform: rotate(-14deg); transform-origin: left; }
.hero-box { position: relative; background: rgba(255,255,255,.93); border: 1px solid var(--navy);
  padding: clamp(28px, 5vw, 64px); max-width: min(560px, 88vw); margin-right: 0; box-shadow: 14px 14px 0 rgba(11,42,74,.12); }
.hero-box h1 { font: 700 clamp(2.6rem, 7vw, 5rem)/1 var(--disp); letter-spacing: -.01em; margin: 18px 0 20px; color: var(--navy); }
.hero-box h1 span { color: var(--sea); }
.lead { color: var(--mute); margin-bottom: 28px; }
.btn { display: inline-block; background: var(--navy); color: #fff; padding: 12px 26px; font: 500 .85rem var(--disp);
  letter-spacing: .14em; text-transform: uppercase; transition: background .2s, transform .2s; }
.btn:hover { background: var(--sea); transform: translateY(-2px); }
.hero-meta { position: absolute; left: var(--pad); bottom: 90px; font: 500 .8rem/1.6 var(--disp); color: var(--navy); letter-spacing: .1em; }
.hero-meta b { color: #fff; text-shadow: 0 0 1px var(--navy); }
.waves { position: absolute; left: 0; bottom: -1px; width: 100%; height: 90px; }

/* SECTIONS */
section { padding: clamp(64px, 10vw, 140px) var(--pad); }
.section-head { display: flex; align-items: flex-end; gap: 22px; margin-bottom: 40px; }
.big-num { font: 700 clamp(3.5rem, 9vw, 6.5rem)/.8 var(--disp); color: var(--sea); }
.section-head h2 { font: 900 clamp(1.6rem, 3.6vw, 2.4rem)/1.1 var(--body); color: var(--navy); margin-top: 10px; }

/* FILTERS */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 36px; }
.filters button { font: 500 .8rem var(--disp); letter-spacing: .12em; text-transform: uppercase; padding: 8px 16px;
  border: 1px solid var(--line); color: var(--mute); transition: all .2s; }
.filters button:hover { border-color: var(--sea); color: var(--sea); }
.filters button.on { background: var(--sea); border-color: var(--sea); color: #fff; }

/* CARDS */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); gap: clamp(20px, 2.4vw, 40px); }
.card { position: relative; display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line);
  transition: transform .25s, box-shadow .25s; animation: rise .5s both; }
.card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px -16px rgba(10,100,160,.35); }
.card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--sea); z-index: 2; }
.cover { position: relative; aspect-ratio: 16/10; background: linear-gradient(135deg, var(--foam), #b8e6f5); overflow: hidden; display: grid; place-items: center; }
.cover img { width: 100%; height: 100%; object-fit: cover; }
.cover .ph { font: 700 4.5rem var(--disp); color: rgba(10,154,214,.28); }
.cover .num { position: absolute; left: 18px; top: 10px; font: 700 2.2rem var(--disp); color: var(--navy); }
.cover .num + img, .cover img ~ .num { color: #fff; }
.body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.tag { font: 500 .72rem var(--disp); letter-spacing: .22em; text-transform: uppercase; color: var(--sea); }
.body h3 { font: 700 1.3rem/1.3 var(--body); color: var(--navy); }
.body p { color: var(--mute); font-size: .92rem; flex: 1; }
.stack { display: flex; flex-wrap: wrap; gap: 6px; }
.stack span { font: 500 .72rem var(--disp); background: var(--foam); color: var(--sea-deep); padding: 3px 9px; }
.actions { display: flex; gap: 14px; margin-top: 8px; font: 500 .8rem var(--disp); letter-spacing: .1em; text-transform: uppercase; }
.actions a { color: var(--navy); border-bottom: 2px solid var(--aqua); padding-bottom: 2px; }
.actions a:hover { color: var(--sea); border-color: var(--sea); }
.soon { color: var(--mute); font: 500 .75rem var(--disp); letter-spacing: .1em; }

/* ABOUT */
.about-body { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); gap: clamp(24px, 5vw, 80px); align-items: start; }
.about-body p { font-size: clamp(1rem, 1.3vw, 1.2rem); max-width: 38em; }
.skills { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.skills li { font: 500 .8rem var(--disp); border: 1px solid var(--navy); padding: 5px 14px; }

/* CONTACT */
.contact { text-align: center; background: var(--foam); }
.contact h2 { font: 900 clamp(1.8rem, 4vw, 2.8rem) var(--body); color: var(--navy); margin: 14px 0 20px; }
.mail { font: 500 clamp(1.1rem, 3vw, 1.7rem) var(--disp); color: var(--sea); border-bottom: 2px solid var(--sea); }
.links { margin-top: 22px; font: 500 .85rem var(--disp); letter-spacing: .14em; text-transform: uppercase; }
.links a:hover { color: var(--sea); }
.footer { text-align: center; padding: 28px; font: 400 .78rem var(--disp); letter-spacing: .14em; color: var(--mute); }

@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } html { scroll-behavior: auto; } }

@media (max-width: 720px) {
  .nav nav a { display: none; }
  .hero-box { margin-right: 0; box-shadow: 8px 8px 0 rgba(11,42,74,.12); }
  .hero-band { right: 6%; }
  .grid { grid-template-columns: 1fr; }
}

/* ---------- motion layer ---------- */
.waves { height: 110px; overflow: hidden; }
.waves svg { position: absolute; left: 0; bottom: 0; width: 200%; height: 100%; }
.waves .w1 { fill: #fff; }
.waves .w2 { fill: rgba(255,255,255,.45); }
.waves svg:nth-child(1) { animation: drift 16s linear infinite; }
.waves svg:nth-child(2) { animation: drift 24s linear infinite reverse; }
@keyframes drift { to { transform: translateX(-50%); } }

.hero-band { animation: bandIn 1.1s cubic-bezier(.2,.8,.2,1) both .2s; transform-origin: top; }
@keyframes bandIn { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.hero-line { animation: lineIn 1.4s ease-out both .5s; }
@keyframes lineIn { from { clip-path: inset(0 100% 0 0); } to { clip-path: inset(0 0 0 0); } }
.hero-box { animation: rise .9s cubic-bezier(.2,.8,.2,1) both .4s; }

.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.section-head, .about-body, .contact > * { transition: opacity .8s ease, transform .8s cubic-bezier(.2,.8,.2,1); }
.js .section-head:not(.in), .js .about-body:not(.in), .js .contact > *:not(.in) { opacity: 0; transform: translateY(26px); }

/* stretched card link */
.body h3 a::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.actions { position: relative; z-index: 3; }
.card:hover .cover .ph { color: rgba(10,154,214,.55); transform: scale(1.08); }
.cover .ph { transition: all .4s; }
.more { font: 500 .75rem var(--disp); letter-spacing: .14em; color: var(--sea); text-transform: uppercase; }

/* ---------- intro gate ---------- */
#gate { position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; text-align: center; color: #fff;
  background: radial-gradient(ellipse at 50% 30%, #1d8fcb 0%, #0b5f9e 45%, #071f3a 100%);
  transition: opacity .9s ease, visibility .9s; }
#gate.leaving { opacity: 0; visibility: hidden; }
.no-gate #gate { display: none; }
.gate-sea i { position: absolute; left: -50%; width: 200%; bottom: 0; height: 40%; border-radius: 45%; background: rgba(79,209,232,.14);
  animation: sway 11s ease-in-out infinite alternate; }
.gate-sea i:nth-child(2) { height: 32%; background: rgba(255,255,255,.07); animation-duration: 15s; animation-direction: alternate-reverse; }
.gate-sea i:nth-child(3) { height: 24%; background: rgba(79,209,232,.18); animation-duration: 9s; }
@keyframes sway { from { transform: translateX(-6%) rotate(-1deg); } to { transform: translateX(6%) rotate(1deg); } }
.gate-inner { position: relative; padding: 24px; max-width: 640px; }
.gate-inner .eyebrow { color: var(--aqua); animation: rise .9s both .2s; }
.gate-title { font: 700 clamp(2.6rem, 10vw, 5.4rem)/1.05 var(--disp); letter-spacing: .04em; margin: 18px 0; animation: rise 1s both .5s; }
.gate-line { color: rgba(255,255,255,.8); margin-bottom: 34px; animation: rise 1s both .9s; }
.gate-btn { border: 1px solid #fff; color: #fff; padding: 14px 40px; font: 500 .9rem var(--disp); letter-spacing: .3em; text-transform: uppercase;
  transition: all .25s; animation: rise 1s both 1.3s; }
.gate-btn:hover { background: #fff; color: var(--sea-deep); letter-spacing: .38em; }
.gate-lang { justify-content: center; margin-top: 30px; animation: rise 1s both 1.6s; }
.gate-lang button { color: rgba(255,255,255,.6); }
.gate-lang button.on { color: #fff; border-color: #fff; }
.gate-lang span { color: rgba(255,255,255,.4); }
body.locked { overflow: hidden; }

/* ============ DEEP SEA THEME (surface -> abyss) ============ */
:root { --deep: #0a3d6e; --abyss: #020a1c; --glow: #6ff0ff; --text: #e6f6ff; --soft: #9fc6dc; }
body { color: var(--text); background: linear-gradient(180deg, var(--deep) 0, #07295a 35%, #041631 70%, var(--abyss) 100%) no-repeat; background-color: var(--abyss); }
main, .footer { position: relative; z-index: 1; }
#sea { position: fixed; inset: 0; z-index: 3; pointer-events: none; }

/* nav: dark glass */
.nav { background: rgba(3, 16, 38, .55); border-bottom: 1px solid rgba(111, 240, 255, .18); color: var(--text); }
.logo b { color: var(--glow); text-shadow: 0 0 14px rgba(111, 240, 255, .6); }
.nav nav a:hover, .lang button.on { color: var(--glow); }
.lang button.on { border-color: var(--glow); }
.lang button { color: var(--soft); }

/* hero: sunlit surface fading into the deep */
.hero { background: linear-gradient(180deg, #d4f4fc 0%, #6fd0ef 34%, #1f88c6 70%, var(--deep) 100%); }
.hero::before { content: ""; position: absolute; inset: -20% -15% 25% -15%; pointer-events: none;
  background: repeating-linear-gradient(104deg, transparent 0 70px, rgba(255,255,255,.30) 110px, transparent 170px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 85%); mask-image: linear-gradient(180deg, #000 0%, transparent 85%);
  animation: rays 14s ease-in-out infinite alternate; }
@keyframes rays { from { transform: translateX(-4%) skewX(-3deg); opacity: .65; } to { transform: translateX(4%) skewX(3deg); opacity: 1; } }
.hero-band { background: linear-gradient(180deg, rgba(111,240,255,.55), rgba(10,61,110,.9)); box-shadow: 0 0 60px rgba(111,240,255,.35); }
.hero-box { background: rgba(4, 22, 50, .62); backdrop-filter: blur(14px); border: 1px solid rgba(111,240,255,.45);
  box-shadow: 0 0 50px rgba(111,240,255,.18), 14px 14px 0 rgba(2,10,28,.25); }
.hero-box h1 { color: #fff; }
.hero-box h1 span { color: var(--glow); text-shadow: 0 0 24px rgba(111,240,255,.75); }
.eyebrow { color: var(--glow); }
.lead { color: var(--soft); }
.btn { background: transparent; color: var(--glow); border: 1px solid var(--glow); }
.btn:hover { background: var(--glow); color: var(--abyss); box-shadow: 0 0 28px rgba(111,240,255,.6); }
.hero-meta, .hero-meta b { color: #fff; text-shadow: 0 1px 10px rgba(2,10,28,.5); }
.waves .w1 { fill: var(--deep); }
.waves .w2 { fill: rgba(111, 240, 255, .28); }

/* sections */
.big-num { color: transparent; -webkit-text-stroke: 1.5px var(--glow); text-shadow: 0 0 30px rgba(111,240,255,.45); }
.section-head h2 { color: #fff; }
.filters button { border-color: rgba(111,240,255,.3); color: var(--soft); }
.filters button:hover { border-color: var(--glow); color: var(--glow); }
.filters button.on { background: var(--glow); border-color: var(--glow); color: var(--abyss); box-shadow: 0 0 22px rgba(111,240,255,.5); }

.card { background: linear-gradient(160deg, rgba(255,255,255,.09), rgba(255,255,255,.02)); border: 1px solid rgba(111,240,255,.22); backdrop-filter: blur(8px); }
.card:hover { border-color: var(--glow); box-shadow: 0 0 40px -6px rgba(111,240,255,.5), 0 20px 50px -20px #000; }
.card::before { background: linear-gradient(180deg, var(--glow), transparent); box-shadow: 0 0 14px var(--glow); }
.cover { background: radial-gradient(circle at 30% 30%, rgba(111,240,255,.28), rgba(4,22,50,.9) 70%); }
.cover .ph { color: rgba(111,240,255,.3); }
.card:hover .cover .ph { color: rgba(111,240,255,.75); text-shadow: 0 0 30px var(--glow); }
.cover .num { color: #fff; }
.tag, .more { color: var(--glow); }
.body h3 { color: #fff; }
.body p { color: var(--soft); }
.stack span { background: rgba(111,240,255,.1); color: var(--glow); border: 1px solid rgba(111,240,255,.2); }
.actions a { color: #fff; border-color: var(--glow); }
.actions a:hover { color: var(--glow); }

.about-body p { color: var(--text); }
.skills li { border-color: rgba(111,240,255,.45); color: var(--text); background: rgba(111,240,255,.06); }
.contact { background: radial-gradient(ellipse at 50% 100%, rgba(111,240,255,.18), transparent 65%); }
.contact h2 { color: #fff; }
.mail { color: var(--glow); border-color: var(--glow); text-shadow: 0 0 18px rgba(111,240,255,.5); }
.footer { color: var(--soft); }
#gate { background: radial-gradient(ellipse at 50% 25%, #1b86c4 0%, #0a3d6e 40%, #020a1c 100%); }

/* ============ MOBILE ============ */
@supports (height: 100svh) { .hero { min-height: 100svh; } }
.nav { padding-top: max(18px, env(safe-area-inset-top)); padding-left: max(clamp(16px, 2.2vw, 44px), env(safe-area-inset-left)); padding-right: max(clamp(16px, 2.2vw, 44px), env(safe-area-inset-right)); }
html { -webkit-text-size-adjust: 100%; }
a, button { -webkit-tap-highlight-color: transparent; }

@media (max-width: 720px) {
  .nav { padding-top: max(12px, env(safe-area-inset-top)); padding-bottom: 12px; }
  .nav nav { gap: 12px; font-size: .72rem; letter-spacing: .03em; }
  .nav nav a { display: inline; }
  .logo { font-size: .9rem; letter-spacing: .08em; }
  .hero { padding: 96px 20px 130px; place-items: center; }
  .hero-band { width: 54px; right: 16px; opacity: .55; }
  .hero-box { width: 100%; max-width: 100%; padding: 28px 22px; }
  .hero-box h1 { font-size: clamp(2.3rem, 13vw, 3.4rem); word-break: keep-all; }
  .lead { word-break: keep-all; }
  .hero-meta { bottom: 64px; left: 20px; }
  .waves { height: 80px; }
  .section-head { gap: 14px; margin-bottom: 28px; }
  .big-num { font-size: 3.6rem; }
  .filters { flex-wrap: nowrap; overflow-x: auto; margin-inline: -20px; padding-inline: 20px; scrollbar-width: none; }
  .filters::-webkit-scrollbar { display: none; }
  .filters button { flex: none; }
  .btn, .filters button { min-height: 44px; display: inline-flex; align-items: center; }
  .actions a { padding: 8px 0; }
  .about-body p, .contact h2 { word-break: keep-all; }
  .mail { font-size: 1.05rem; word-break: break-all; }
  .gate-title { font-size: clamp(2.2rem, 12vw, 3.6rem); }
  .gate-line { word-break: keep-all; }
}
@media (hover: none) {
  .card:hover { transform: none; }
  .gate-btn:hover, .btn:hover { letter-spacing: inherit; }
}

:root { color-scheme: dark; }
body { font-size: 16px; }

.soon-badge { display: inline-block; font: 500 .72rem var(--disp); letter-spacing: .14em; text-transform: uppercase; color: var(--glow); border: 1px dashed rgba(111,240,255,.55); padding: 5px 12px; }