/* ishere.kr — Swiss/editorial, paper & ink with Klein blue accent */

:root {
  --paper: oklch(97.5% 0.006 85);
  --paper-deep: oklch(94.5% 0.01 85);
  --ink: oklch(20% 0.012 270);
  --ink-soft: oklch(45% 0.012 270);
  --line: oklch(85% 0.01 85);
  --accent: oklch(45% 0.24 264); /* Klein blue */
  --accent-ink: oklch(98% 0.005 264);

  --font-sans: "Pretendard Variable", Pretendard, -apple-system, sans-serif;
  --font-serif: "Instrument Serif", Georgia, serif;

  --text-hero: clamp(3.4rem, 1.2rem + 11vw, 11rem);
  --text-title: clamp(2.2rem, 1rem + 5vw, 5rem);
  --text-body: clamp(1.02rem, 0.95rem + 0.3vw, 1.15rem);

  --space-section: clamp(5rem, 3rem + 8vw, 11rem);
  --gutter: clamp(1.25rem, 4vw, 4rem);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --reveal-duration: 900ms;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

/* paper grain + faint accent glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
}
body::after {
  content: "";
  position: fixed;
  top: -30vmax;
  right: -25vmax;
  width: 70vmax;
  height: 70vmax;
  pointer-events: none;
  background: radial-gradient(closest-side, oklch(45% 0.24 264 / 0.07), transparent 70%);
}

::selection { background: var(--accent); color: var(--accent-ink); }

a { color: inherit; }

.accent { color: var(--accent); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -3rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  transition: top 200ms var(--ease-out);
}
.skip-link:focus { top: 0.75rem; }

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

/* ---- header ---- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  background: oklch(97.5% 0.006 85 / 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem var(--gutter);
}

.wordmark {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.5rem;
  text-decoration: none;
  letter-spacing: -0.01em;
}
.wordmark-dot { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.2rem);
  font-size: 0.92rem;
  font-weight: 600;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  transition: color 180ms var(--ease-out);
}
.nav-links a:hover { color: var(--ink); }

.nav-links .nav-cta {
  color: var(--accent-ink);
  background: var(--ink);
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  transition: background 180ms var(--ease-out), transform 180ms var(--ease-out);
}
.nav-links .nav-cta:hover {
  background: var(--accent);
  color: var(--accent-ink);
  transform: translateY(-1px);
}

/* hamburger — desktop에서는 숨김 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  background: none;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 300ms var(--ease-out);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child {
  transform: translateY(4.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child {
  transform: translateY(-4.5px) rotate(-45deg);
}

/* ---- hero ---- */

.hero {
  position: relative;
  z-index: 2;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 7rem var(--gutter) 4rem;
}

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
}

.hero-display {
  margin: 0;
  font-size: var(--text-hero);
  font-weight: 850;
  line-height: 0.98;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.hero-display > span { display: block; }

.hero-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-left: clamp(0.5rem, 8vw, 9rem); /* offset second line — editorial stagger */
}

/* rotating word — fixed-height window, vertical track */
.rotator {
  display: inline-block;
  overflow: hidden;
  height: 1.02em;
  vertical-align: bottom;
}
.rotator-track {
  display: flex;
  flex-direction: column;
  transition: transform 700ms var(--ease-out);
}
.rotator-word {
  display: block;
  height: 1.02em;
  line-height: 1.02;
}

.hero-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-top: clamp(2.5rem, 6vh, 4.5rem);
}

.hero-copy {
  margin: 0;
  max-width: 26em;
  font-size: clamp(1.1rem, 1rem + 0.6vw, 1.4rem);
  line-height: 1.55;
  color: var(--ink-soft);
}
.hero-copy strong { color: var(--ink); font-weight: 800; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn-solid,
.btn-line {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none;
  transition: transform 200ms var(--ease-out), background 200ms var(--ease-out),
    color 200ms var(--ease-out), border-color 200ms var(--ease-out);
}

.btn-solid {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-solid:hover { background: var(--ink); transform: translateY(-2px); }

.btn-line {
  border: 1.5px solid var(--line);
  color: var(--ink);
}
.btn-line:hover { border-color: var(--ink); transform: translateY(-2px); }

.hero-domain {
  margin: clamp(2rem, 5vh, 3.5rem) 0 0;
  font-family: ui-monospace, "SF Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}
.hero-domain b { font-weight: 400; color: oklch(65% 0.01 270); }

/* ---- marquee ---- */

.marquee {
  overflow: hidden;
  border-block: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 0.8rem 0;
}

.marquee-track {
  display: flex;
  width: max-content;
  white-space: nowrap;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  animation: marquee 26s linear infinite;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ---- services ---- */

.services {
  position: relative;
  z-index: 2;
  padding: var(--space-section) var(--gutter);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  margin-bottom: clamp(2rem, 5vw, 4rem);
}

.section-title {
  margin: 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: var(--text-title);
  letter-spacing: -0.02em;
}

.section-sub {
  margin: 0;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.95rem;
}

.service-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink);
}

.service-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
  padding: clamp(1.4rem, 3vw, 2.2rem) 0.5rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: background 250ms var(--ease-out), padding-left 250ms var(--ease-out);
}

a.service-row:hover {
  background: var(--paper-deep);
  padding-left: 1.25rem;
}

.service-no {
  font-family: ui-monospace, "SF Mono", monospace;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.service-body { display: grid; gap: 0.3rem; }

.service-name {
  font-size: clamp(1.5rem, 1.1rem + 2.2vw, 2.6rem);
  font-weight: 850;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
a.service-row:hover .service-name { color: var(--accent); }

.service-desc {
  color: var(--ink-soft);
  font-size: 0.95rem;
  max-width: 38em;
}

.service-meta {
  display: grid;
  gap: 0.35rem;
  justify-items: end;
  text-align: right;
}

.badge {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  padding: 0.28em 0.8em;
  border-radius: 999px;
}
.badge.live { background: var(--accent); color: var(--accent-ink); }
.badge.soon { border: 1px solid var(--line); color: var(--ink-soft); }
.badge.idea { border: 1px dashed var(--ink-soft); color: var(--ink-soft); }

.service-domain {
  font-family: ui-monospace, "SF Mono", monospace;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.service-arrow {
  font-size: 1.5rem;
  transition: transform 250ms var(--ease-out);
}
a.service-row:hover .service-arrow { transform: translate(4px, -4px); }
a.service-row.is-idea:hover .service-arrow { transform: translateY(4px); }

.service-row.is-soon { opacity: 0.55; }

/* ---- contact ---- */

.contact {
  position: relative;
  z-index: 2;
  padding: var(--space-section) var(--gutter);
  border-top: 1px solid var(--ink);
  background: var(--paper-deep);
}

.contact-title {
  margin: 0.5rem 0 2rem;
  font-size: var(--text-title);
  font-weight: 850;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.contact-mail {
  display: inline-block;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.6rem, 1rem + 3.5vw, 3.4rem);
  text-decoration: none;
  letter-spacing: -0.01em;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 100% 2px;
  transition: color 250ms var(--ease-out), background-size 250ms var(--ease-out);
}
.contact-mail:hover {
  color: var(--accent);
  background-size: 100% 0.5em;
  background-position: 0 88%;
}

/* ---- footer ---- */

.site-footer {
  position: relative;
  z-index: 2;
  padding: 2.5rem var(--gutter) 3rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.footer-mark {
  margin: 0 0 0.5rem;
  font-family: ui-monospace, "SF Mono", monospace;
  font-size: 0.78rem;
}
.footer-mark span { color: oklch(65% 0.01 270); }

/* ---- reveal on scroll ---- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--reveal-duration) var(--ease-out),
    transform var(--reveal-duration) var(--ease-out);
}
.reveal.in { opacity: 1; transform: none; }

.reveal.d1 { transition-delay: 90ms; }
.reveal.d2 { transition-delay: 180ms; }
.reveal.d3 { transition-delay: 280ms; }
.reveal.d4 { transition-delay: 380ms; }

/* ---- responsive ---- */

@media (max-width: 720px) {
  .hero { padding-top: 6rem; }
  .hero-serif { margin-left: clamp(1rem, 12vw, 4rem); }

  .service-row {
    grid-template-columns: auto 1fr auto;
  }
  .service-arrow { display: none; }
  .service-meta { justify-items: end; }

  /* nav → hamburger + 드롭다운 패널 */
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 65px; /* 헤더 높이 */
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.5rem var(--gutter) 1.75rem;
    background: var(--paper);
    border-bottom: 1px solid var(--ink);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 250ms var(--ease-out), transform 250ms var(--ease-out),
      visibility 0s linear 250ms;
  }

  .nav-toggle[aria-expanded="true"] + .nav-links {
    visibility: visible;
    opacity: 1;
    transform: none;
    transition: opacity 250ms var(--ease-out), transform 250ms var(--ease-out);
  }

  .nav-links a {
    width: 100%;
    padding: 0.9rem 0;
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
    font-size: 1.8rem;
    border-bottom: 1px solid var(--line);
  }

  .nav-links .nav-cta {
    width: auto;
    margin-top: 1.25rem;
    padding: 0.7rem 1.4rem;
    font-family: var(--font-sans);
    font-style: normal;
    font-weight: 700;
    font-size: 1rem;
    border-bottom: 0;
  }
}

@media (max-width: 480px) {
  .service-row { grid-template-columns: 1fr auto; }
  .service-no { display: none; }
}

/* ---- reduced motion ---- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .marquee-track { animation: none; }
  .rotator-track { transition: none; }
}