/*
 * index.html 전용 규칙입니다. 원본 <style> 에서 그대로 옮겼습니다.
 * 공통 규칙은 site.css 에 있으며, 이 파일이 나중에 로드되어 우선합니다.
 */

/* ===== fonts ===== */

/* ===== tokens ===== */

:root {
  --c-bg: #FFFFFF;
  --c-text: #2B2B2B;
  --c-text-sub: #4A4A4A;
  --c-text-mute: #6B6B6B;
  --c-text-faint: #5A5A5A;
  --c-dark-bg: #0F0F0E;
  --c-dark-text: #F1F1F1;
  --c-dark-sub: #C6C6C6;
  --c-dark-mute: #A8A8A8;
  --c-dark-faint: #8A8A84;
  --c-line: #E0E0E0;
  --c-line-strong: #D6D6D6;
  --c-line-dark: #2F2F2D;
  --c-fill: #F1F1EF;
  --c-fill-soft: #F3F3F1;
  --c-fill-dark: #262624;
  --c-brand: #0016D5;
  --c-brand-hover: #0011A8;
  --c-brand-on-dark: #4A6BFF;

  --font-head: 'Paperlogy', sans-serif;
  --font-body: 'Pretendard Variable', Pretendard, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --fs-h1: 128px;
  --fs-h2: 56px;
  --fs-h3: 24px;
  --fs-card-title: 32px;
  --fs-body: 18px;
  --fs-caption: 14px;
  --fs-hero-sub: 20px;

  --pad-x: 120px;
  --pad-y: 200px;
  --col: 1200px;
  --gap-xs: 8px;
  --gap-s: 16px;
  --gap-m: 24px;
  --gap-l: 40px;
  --gap-xl: 64px;

  --r-card: 6px;
  --r-pill: 999px;
  --r-device: 28px;
  --header-h: 88px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-std: cubic-bezier(0.2, 0, 0, 1);
}

/* ===== base ===== */

input, select, textarea, button { font-family: inherit; font-size: inherit; color: inherit; }

::placeholder { color: #9A9A9A; }

h1, h2, h3, p, dl, dd, figure { margin: 0; }

.section { padding: var(--pad-y) var(--pad-x); }

.section--tight-top { padding-top: 40px; }

.container { width: 100%; max-width: var(--col); margin: 0 auto; }

/* ===== intro curtain ===== */

.intro-curtain {
  position: fixed; inset: 0; z-index: 999;
  background: #080807;
  display: flex; align-items: center; justify-content: center;
  transition: transform 1.5s cubic-bezier(0.7, 0, 0.15, 1);
}

.intro-curtain[data-up="1"] { transform: translateY(-100%); }

.intro-curtain__text {
  font-family: var(--font-mono);
  font-weight: 800; font-size: 40px;
  letter-spacing: 0.1em;
  color: var(--c-dark-text);
}

.intro-curtain .doodle { color: #55554F; }

.intro-curtain .brand { color: var(--c-brand); }

/* ===== header ===== */

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: var(--header-h);
  display: flex; align-items: center;
  padding: 0 var(--pad-x);
  color: var(--c-dark-text);
  transition: background 240ms linear, color 240ms linear;
}

.site-header--light { color: var(--c-text); }

.site-header--scrolled { background: rgba(15, 15, 14, 0.82); backdrop-filter: blur(12px); }

.site-header--light.site-header--scrolled { background: rgba(255, 255, 255, 0.92); }

.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--gap-s); width: 100%; min-width: 0;
}

.brand-logo { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }

.brand-logo__mark, .brand-logo__wordmark { position: relative; display: block; flex-shrink: 0; }

.brand-logo img { position: absolute; inset: 0; width: 100%; height: 100%; }

.brand-logo__on-light { opacity: 0; }

.site-header--light .brand-logo__on-dark { opacity: 0; }

.site-header--light .brand-logo__on-light { opacity: 1; }

.site-nav { display: flex; align-items: center; gap: 32px; font-size: 16px; white-space: nowrap; flex-shrink: 0; }

.nav-burger {
  display: none; flex-direction: column; justify-content: center; gap: 6px;
  width: 44px; height: 44px; padding: 0; border: 0;
  background: transparent; cursor: pointer; flex-shrink: 0;
}

.nav-overlay {
  position: fixed; top: 0; left: 0; right: 0; height: 100vh; z-index: 49;
  background: var(--c-dark-bg); color: var(--c-dark-text);
  display: none; flex-direction: column; justify-content: center;
  gap: 32px; padding: 0 var(--gap-m);
}

.nav-overlay__meta { margin-top: var(--gap-m); font-size: var(--fs-caption); color: var(--c-dark-faint); }

/* ===== hero ===== */

.hero {
  position: relative;
  min-height: max(100vh, 840px);
  background: var(--c-dark-bg);
  color: var(--c-dark-text);
  overflow: hidden;
}

.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.hero__content {
  position: absolute; left: 50%; top: 46%; transform: translate(-50%, -50%);
  width: 100%; padding: 0 var(--pad-x);
  display: flex; flex-direction: column; align-items: center;
  text-align: center; gap: 28px; pointer-events: none;
}

.hero__title {
  font-family: var(--font-head); font-weight: 500;
  font-size: var(--fs-h1); line-height: 1.06; letter-spacing: -0.03em;
}

.hero__line-mask { display: block; overflow: hidden; padding-bottom: 4px; }

.hero__line {
  display: inline-block; transform: translateY(110%); opacity: 0;
  animation: heroRevealUp 1.2s var(--ease) forwards;
}

.hero__line--1 { animation-delay: 2.2s; }

.hero__line--2 { animation-delay: 2.4s; }

.hero__dot { color: var(--c-brand-on-dark); }

.hero__sub {
  font-family: var(--font-head); font-weight: 400;
  font-size: var(--fs-hero-sub); line-height: 1.7; letter-spacing: -0.02em;
  color: #FFFFFF; opacity: 0;
  animation: heroFadeIn 1s var(--ease) 2.7s forwards;
}

.hero__scroll {
  position: absolute; left: 50%; bottom: 56px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  opacity: 0; animation: heroFadeIn 1s ease 3s forwards;
}

.hero__scroll-label {
  font-family: var(--font-head); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-dark-faint);
}

.hero__scroll svg { animation: scrollNudge 2.2s ease-in-out infinite; }

@keyframes heroRevealUp { from { transform: translateY(110%); opacity: 0 } to { transform: translateY(0); opacity: 1 } }

@keyframes heroFadeIn { from { opacity: 0 } to { opacity: 1 } }

@keyframes scrollNudge { 0%, 100% { transform: translateY(0); opacity: 0.5 } 50% { transform: translateY(7px); opacity: 1 } }

/* ===== section header ===== */

.section-head { display: flex; flex-direction: column; gap: var(--gap-l); max-width: 840px; }

.section-label {
  font-family: var(--font-head); font-weight: 600; font-size: var(--fs-caption);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-text-sub);
}

.section-label__line {
  display: inline-block; width: 0; height: 1px; background: currentColor;
  margin-right: 0; vertical-align: middle;
  transition: width 800ms var(--ease), margin-right 800ms var(--ease);
}

.section-title {
  font-family: var(--font-head); font-weight: 500;
  font-size: var(--fs-h2); line-height: 1.35; letter-spacing: -0.02em;
}

.section-title .accent { color: var(--c-brand); transition: color 600ms ease; }

.section-sub { font-size: var(--fs-body); line-height: 1.7; color: var(--c-text-sub); }

.section--dark { background: var(--c-dark-bg); color: var(--c-dark-text);
  background-image: radial-gradient(#35352F 1px, transparent 1px); background-size: 24px 24px; }

.section--dark .section-label { color: var(--c-dark-sub); }

.section--dark .section-sub { color: var(--c-dark-sub); }

.section--dark .section-title .accent { color: var(--c-brand-on-dark); }

/* reveal-on-scroll initial states */

[data-reveal] .section-label,
[data-reveal] .section-title,
[data-reveal] .section-sub { opacity: 0; }

[data-reveal] .section-label { transform: translateY(10px); transition: opacity 700ms var(--ease), transform 700ms var(--ease); }

[data-reveal] .section-title { transform: translateY(28px); transition: opacity 900ms var(--ease) 120ms, transform 900ms var(--ease) 120ms; }

[data-reveal] .section-sub { transform: translateY(16px); transition: opacity 800ms var(--ease) 320ms, transform 800ms var(--ease) 320ms; }

[data-reveal].is-visible .section-label,
[data-reveal].is-visible .section-title,
[data-reveal].is-visible .section-sub { opacity: 1; transform: none; }

[data-reveal].is-visible .section-label__line { width: 48px; margin-right: var(--gap-s); }

/* ===== service ===== */

.service-layout {
  display: grid; grid-template-columns: 400px 1fr;
  gap: var(--gap-xl); margin-top: 96px; align-items: start;
}

.service-panel { display: flex; flex-direction: column; gap: var(--gap-l); min-width: 0; }

.service-tabs { display: flex; flex-direction: column; border-bottom: 0.5px solid var(--c-line); }

.service-tab {
  display: flex; flex-direction: column; gap: var(--gap-xs);
  padding: var(--gap-m) 0; border: 0; border-top: 0.5px solid var(--c-line);
  background: transparent; text-align: left; cursor: pointer;
  color: var(--c-dark-faint); transition: color 200ms linear;
  font-family: var(--font-head); font-weight: 500;
  font-size: var(--fs-card-title); line-height: 1.35; letter-spacing: -0.02em;
}

.service-tab.is-active { color: var(--c-text); }

.service-desc { display: flex; flex-direction: column; gap: 20px; transition: opacity 220ms linear; }

.service-desc__logo { width: 168px; height: auto; object-fit: contain; }

.service-desc__lead { font-size: var(--fs-body); line-height: 1.6; }

.service-desc__body { font-size: var(--fs-body); line-height: 1.75; color: var(--c-text-sub); white-space: pre-line; }

.btn-primary {
  align-self: flex-start; border: 0; border-radius: var(--r-pill);
  background: var(--c-brand); color: #FFFFFF;
  padding: 16px 32px; font-size: 16px; cursor: pointer;
  transition: background 200ms linear;
}

.btn-ghost {
  border: 0.5px solid var(--c-line-strong); border-radius: var(--r-pill);
  padding: 14px 28px; font-size: 15px; background: transparent; cursor: pointer;
}

.btn-ghost:hover { background: var(--c-text); color: #FFFFFF; opacity: 1; }

.service-mockups {
  position: relative; min-width: 0; height: 620px;
  display: flex; align-items: flex-start; justify-content: flex-end; padding-right: var(--gap-m);
}

.service-mockups[hidden], .service-web[hidden] { display: none; }

.device-phone {
  position: relative; width: 300px; height: 600px; flex-shrink: 0;
  border-radius: var(--r-device); background: #FFFFFF; overflow: hidden;
  box-shadow: 0 18px 40px rgba(15,15,14,0.10), 0 2px 8px rgba(15,15,14,0.06);
  transition: opacity 220ms linear, transform 320ms var(--ease-std), box-shadow 320ms var(--ease-std);
}

.device-phone:hover { transform: translateY(-6px); box-shadow: 0 26px 56px rgba(15,15,14,0.14), 0 3px 10px rgba(15,15,14,0.07); }

.device-phone--back { margin-left: -48px; margin-top: 76px; }

.device-phone img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top center; background: var(--c-fill); }

.device-phone--back img { object-position: center top; }

.service-web { min-width: 0; display: flex; flex-direction: column; gap: var(--gap-m); }

.device-browser {
  border: 0.5px solid var(--c-line-strong); border-radius: 8px; overflow: hidden; background: #FFFFFF;
  transition: opacity 220ms linear, transform 320ms var(--ease-std), box-shadow 320ms var(--ease-std);
}

.device-browser:hover { transform: translateY(-6px); box-shadow: 0 26px 56px rgba(15,15,14,0.14); }

.device-browser__bar {
  display: flex; align-items: center; gap: 6px; height: 32px; padding: 0 12px;
  border-bottom: 0.5px solid #E8E8E8;
}

.device-browser__bar span { width: 7px; height: 7px; border-radius: 50%; background: var(--c-line-strong); }

.device-browser__screen { position: relative; width: 100%; aspect-ratio: 16 / 10; background: var(--c-fill); }

.device-browser__screen img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center top; }

.service-web__pair { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-m); }

.service-web__pair div { aspect-ratio: 4 / 3; border: 0.5px solid var(--c-line-strong); border-radius: var(--r-card); background: var(--c-fill); }

/* reveal for mockups */

.reveal-card { opacity: 0.15; transform: translateY(36px); transition: opacity 220ms linear, transform 620ms var(--ease), box-shadow 320ms var(--ease-std); }

.reveal-card.is-visible { opacity: 1; transform: translateY(0); }

/* ===== work areas ===== */

.work-areas { margin-top: 120px; }

.work-areas__title {
  font-family: var(--font-head); font-weight: 500; font-size: var(--fs-h3);
  line-height: 1.35; letter-spacing: -0.02em; margin-bottom: var(--gap-l);
}

.work-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }

.work-item {
  border-top: 0.5px solid var(--c-line); padding-top: var(--gap-m);
  display: flex; flex-direction: column; gap: 12px;
}

.work-item__no { font-family: var(--font-head); font-size: var(--fs-caption); letter-spacing: 0.08em; color: var(--c-text-mute); }

.work-item__name { font-size: var(--fs-body); line-height: 1.5; }

.work-item__desc { font-size: var(--fs-caption); line-height: 1.6; color: var(--c-text-faint); }

/* ===== process diagram ===== */

.process-viewport { width: 100%; height: 424px; margin-top: 96px; overflow: hidden; }

.process-stage { position: relative; width: 1200px; height: 424px; transform-origin: top left; }

.process-stage > * { opacity: 0; transition: opacity 520ms var(--ease), transform 620ms var(--ease); }

.process-stage.is-visible > * { opacity: 1; transform: none; }

.process-group { position: absolute; top: 40px; width: 280px; height: 280px; border-radius: 50%; background: var(--c-fill-soft); transform: scale(0.82); }

.process-group--plan { left: 78px; }

.process-group--design { left: 342px; }

.process-group--develop { left: 611px; }

.process-group--care { left: 867px; }

.process-stage-name {
  position: absolute; top: 72px; width: 200px; text-align: center;
  font-family: var(--font-head); font-weight: 500; font-size: var(--fs-caption);
  letter-spacing: 0.08em; text-transform: uppercase; transform: translateY(10px);
}

.process-stage-desc {
  position: absolute; top: 268px; width: 200px; text-align: center;
  font-size: var(--fs-caption); color: var(--c-text-faint); transform: translateY(10px);
}

.process-step {
  position: absolute; top: 124px; width: 132px; height: 132px; border-radius: 50%;
  background: var(--c-dark-bg); color: var(--c-dark-text);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; letter-spacing: -0.01em; transform: scale(0.82);
}

.process-arrow { position: absolute; left: 815px; top: 182px; width: 365px; height: 16px; transform: translateY(10px); }

.process-out-line { position: absolute; width: 1px; border-left: 1px dotted #A5A5A5; transform: translateY(10px); }

.process-out-label { position: absolute; width: 160px; text-align: center; font-size: var(--fs-caption); transform: translateY(10px); }

/* ===== cards (projects / insights) ===== */

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap-xl) 48px; margin-top: 112px; }

.card-grid--insights { gap: 48px; margin-top: 96px; }

.card { display: flex; flex-direction: column; gap: 20px; cursor: pointer; }

.card__thumb { width: 100%; aspect-ratio: 16 / 9; border-radius: var(--r-card); background: var(--c-fill); transition: transform 320ms var(--ease-std); }

.card:hover .card__thumb { transform: translateY(-6px); }

.section--dark .card__thumb { background: var(--c-fill-dark); }

.card__tag { font-size: var(--fs-caption); color: var(--c-text-mute); }

.section--dark .card__tag { color: var(--c-dark-mute); }

.card__title { font-family: var(--font-head); font-weight: 500; font-size: var(--fs-h3); line-height: 1.35; letter-spacing: -0.02em; }

.card__desc { font-size: 16px; line-height: 1.7; color: var(--c-text-sub); text-wrap: pretty; }

.section--dark .card__desc { color: var(--c-dark-sub); }

.card__meta { margin-top: auto; font-size: var(--fs-caption); color: var(--c-text-mute); }

.section--dark .card__meta { color: var(--c-dark-mute); text-align: right; }

.link-more { display: flex; justify-content: flex-end; margin-top: 80px; }

.link-more a { font-size: 16px; border-bottom: 0.5px solid var(--c-text); padding-bottom: 6px; }

.section--dark .link-more a { border-color: var(--c-dark-text); }

/* ===== contact ===== */

.contact-layout { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 48px; margin-top: 96px; align-items: start; }

.contact-info { display: flex; flex-direction: column; gap: var(--gap-l); }

.contact-map { width: 100%; height: 360px; border-radius: var(--r-card); background: var(--c-fill); }

.contact-dl { display: flex; flex-direction: column; gap: 20px; }

.contact-dl__row {
  display: grid; grid-template-columns: 96px 1fr; gap: var(--gap-s);
  border-top: 0.5px solid var(--c-line); padding-top: 20px;
}

.contact-dl dt { font-size: var(--fs-caption); color: var(--c-text-mute); }

.contact-dl dd { font-size: var(--fs-body); line-height: 1.6; }

.contact-maps { display: flex; gap: var(--gap-m); font-size: 16px; }

.contact-maps a { display: inline-flex; align-items: center; gap: var(--gap-xs); border-bottom: 0.5px solid var(--c-text); padding-bottom: 4px; }

.contact-maps img { width: 20px; height: 20px; object-fit: contain; }

.contact-maps img.is-rounded { border-radius: 4px; }

.contact-form {
  display: flex; flex-direction: column; gap: 28px;
  border: 0.5px solid var(--c-line); border-radius: var(--r-card); padding: 48px; min-width: 0;
}

.field { display: flex; flex-direction: column; gap: 10px; }

.field__label { font-size: var(--fs-caption); color: var(--c-text-faint); }

.field input, .field textarea, .field select {
  border: 0.5px solid var(--c-line-strong); border-radius: 0;
  background: transparent; padding: 14px 16px; font-size: 16px; width: 100%;
}

.field textarea { resize: vertical; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }

.select-wrap { position: relative; display: block; width: 100%; }

.select-wrap select { appearance: none; padding-right: 44px; }

.select-wrap svg { position: absolute; right: var(--gap-s); top: 50%; transform: translateY(-50%); pointer-events: none; }

.field-check { display: flex; align-items: center; gap: 12px; font-size: var(--fs-caption); color: var(--c-text-sub); }

.field-check input { width: 18px; height: 18px; accent-color: var(--c-text); }

.form-note { font-size: var(--fs-caption); color: var(--c-text-faint); }

/* ===== footer ===== */

.site-footer nav { display: flex; flex-wrap: wrap; gap: 32px; font-size: var(--fs-caption); white-space: nowrap; }

.site-footer__meta { display: flex; flex-direction: column; gap: var(--gap-xs); font-size: var(--fs-caption); line-height: 1.8; color: var(--c-dark-sub); }

/* ===== responsive ===== */

@media (max-width: 1024px) {
  :root {
    --pad-x: 48px; --pad-y: 120px;
    --fs-h1: 72px; --fs-h2: 40px; --fs-card-title: 28px; --fs-hero-sub: 18px;
    --gap-xl: 48px;
  }
  .site-nav { display: none; }
  .nav-burger { display: flex; }
  .service-layout { grid-template-columns: 1fr; }
  .service-mockups { height: 500px; }
  .device-phone { width: 220px; height: 440px; }
  .device-phone--back { margin-top: 56px; }
  .card-grid, .card-grid--insights { grid-template-columns: repeat(2, 1fr); }
  .work-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr; }
  .process-viewport { height: 259px; }
  .process-stage { transform: scale(0.61); }
}

@media (max-width: 680px) {
  :root {
    --pad-x: 20px; --pad-y: 80px;
    --fs-h1: 40px; --fs-h2: 28px; --fs-h3: 20px; --fs-card-title: 24px;
    --fs-body: 16px; --fs-hero-sub: 16px;
    --gap-xl: 32px;
  }
  .brand-logo__wordmark { display: none; }
  .card-grid, .card-grid--insights, .work-grid, .field-row { grid-template-columns: 1fr; }
  .service-mockups { height: 360px; padding-right: 0; }
  .device-phone { width: 160px; height: 320px; }
  .device-phone--back { margin-left: -24px; margin-top: 40px; }
  .contact-form { padding: var(--gap-m); }
  .contact-dl__row { grid-template-columns: 1fr; gap: 6px; }
  .process-viewport { height: 123px; }
  .process-stage { transform: scale(0.29); }
  .link-more { margin-top: var(--gap-l); }
}

@media (prefers-reduced-motion: reduce) {
  .hero__line, .hero__sub, .hero__scroll { animation: none !important; transform: none !important; opacity: 1 !important; }
  .hero__scroll svg { animation: none !important; }
}