* {
  box-sizing: border-box;
}

:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: clamp(3.5rem, 8vw, 6.5rem);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  font-family: "Trebuchet MS", Verdana, sans-serif;
  color-scheme: dark;
}

:lang(ko) {
  font-family: "Malgun Gothic", "맑은 고딕", Verdana, sans-serif;
  word-break: keep-all;
}

html {
  min-height: 100%;
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 80% -10%, color-mix(in oklch, var(--accent-2) 22%, transparent), transparent 34rem),
    radial-gradient(circle at 10% 18%, color-mix(in oklch, var(--accent) 19%, transparent), transparent 28rem),
    linear-gradient(160deg, var(--bg), color-mix(in oklch, var(--bg) 82%, var(--surface)));
  font-size: 1rem;
  line-height: 1.6;
  font-kerning: normal;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: var(--hero-image);
  background-size: cover;
  background-position: center;
  opacity: 0.16;
  filter: saturate(1.08) contrast(1.08);
  transform: scale(1.05);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--bg) 88%, transparent), transparent 42%, color-mix(in oklch, var(--bg) 82%, transparent)),
    radial-gradient(circle at var(--mx, 50%) var(--my, 20%), color-mix(in oklch, var(--accent) 10%, transparent), transparent 18rem);
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

button,
a,
select,
input {
  -webkit-tap-highlight-color: transparent;
}

img {
  max-width: 100%;
}

.page-shell {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: 82px;
  padding: var(--space-3) 0;
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
  font-family: Bahnschrift, "Arial Narrow", Arial, sans-serif;
  font-weight: 800;
  letter-spacing: 0.01em;
}

:lang(ko) .brand-lockup,
:lang(ko) h1,
:lang(ko) h2,
:lang(ko) h3 {
  font-family: "Malgun Gothic", "맑은 고딕", Arial, sans-serif;
}

.brand-sigil {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: var(--bg);
  background: var(--accent);
  font-size: 0.76rem;
  box-shadow: 0 0 0 1px color-mix(in oklch, var(--ink) 18%, transparent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
  padding: 5px;
  border: 1px solid color-mix(in oklch, var(--line) 78%, transparent);
  border-radius: 10px;
  background: color-mix(in oklch, var(--surface) 82%, transparent);
}

.site-nav a,
.top-action,
.button,
.nav-toggle {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  font-weight: 800;
}

.site-nav a {
  padding: 0 var(--space-3);
  color: var(--muted);
}

.site-nav a[aria-current="page"] {
  color: var(--bg);
  background: var(--ink);
}

.top-action {
  padding: 0 var(--space-4);
  color: var(--bg);
  background: var(--accent);
}

.nav-toggle {
  display: none;
  border: 0;
  color: var(--ink);
  background: var(--surface);
  padding: 0 var(--space-4);
}

main {
  display: grid;
  gap: var(--space-7);
  padding-bottom: var(--space-7);
}

.hero-scene {
  position: relative;
  min-height: calc(100vh - 118px);
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1.05fr);
  align-items: center;
  gap: clamp(1.5rem, 5vw, 5rem);
  overflow: hidden;
  border-radius: 14px;
  padding: clamp(1.25rem, 5vw, 4rem);
  background:
    linear-gradient(110deg, color-mix(in oklch, var(--surface) 90%, transparent), color-mix(in oklch, var(--bg) 74%, transparent)),
    var(--hero-image);
  background-size: cover;
  background-position: center;
  isolation: isolate;
}

.hero-scene::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 75% 40%, color-mix(in oklch, var(--accent-2) 18%, transparent), transparent 20rem),
    linear-gradient(90deg, color-mix(in oklch, var(--bg) 92%, transparent), transparent 70%);
  pointer-events: none;
}

.hero-scene::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 36%;
  z-index: -1;
  background: linear-gradient(0deg, color-mix(in oklch, var(--accent) 18%, transparent), transparent);
  clip-path: polygon(0 35%, 55% 0, 100% 46%, 100% 100%, 0 100%);
  opacity: 0.55;
}

.atmosphere {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.72;
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 66ch;
}

.scene-label {
  width: fit-content;
  margin: 0 0 var(--space-5);
  padding: 0.44rem 0.66rem;
  border-radius: 7px;
  color: var(--bg);
  background: var(--accent);
  font-weight: 800;
  line-height: 1.2;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: Bahnschrift, "Arial Narrow", Arial, sans-serif;
  text-wrap: balance;
}

h1 {
  max-width: 12ch;
  font-size: clamp(2.65rem, 8.4vw, 5.9rem);
  line-height: 0.9;
  letter-spacing: -0.025em;
}

:lang(ko) h1 {
  max-width: 10ch;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.lead {
  max-width: 62ch;
  margin: var(--space-5) 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.28rem);
  line-height: 1.72;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.button {
  border: 0;
  padding: 0 var(--space-5);
  cursor: pointer;
  transition: transform 180ms var(--ease-out), background-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.button:hover {
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(1px) scale(0.98);
}

.button:focus-visible,
.site-nav a:focus-visible,
.top-action:focus-visible,
.nav-toggle:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid color-mix(in oklch, var(--accent-2) 70%, white);
  outline-offset: 3px;
}

.button-primary {
  color: var(--bg);
  background: var(--accent);
}

.button-secondary {
  color: var(--ink);
  background: color-mix(in oklch, var(--surface) 82%, var(--accent-2));
}

.creative-stage {
  position: relative;
  z-index: 1;
  margin: 0;
  min-height: 420px;
  display: grid;
  place-items: center;
}

.creative-stage::before {
  content: "";
  position: absolute;
  inset: 10% 4%;
  border-radius: 14px;
  background:
    radial-gradient(circle at 45% 45%, color-mix(in oklch, var(--accent) 38%, transparent), transparent 50%),
    radial-gradient(circle at 60% 60%, color-mix(in oklch, var(--accent-2) 34%, transparent), transparent 56%);
  filter: blur(24px);
  opacity: 0.86;
}

.creative-stage picture {
  position: relative;
  z-index: 1;
  display: block;
  width: min(560px, 100%);
  transform: rotate(-1.5deg);
  animation: floatStage 7s var(--ease-out) infinite alternate;
}

.creative-stage img {
  display: block;
  width: 100%;
  aspect-ratio: 1.15;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 8px 8px color-mix(in oklch, black 36%, transparent);
}

.creative-stage figcaption {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 9%;
  max-width: 220px;
  padding: var(--space-3) var(--space-4);
  border-radius: 8px;
  color: var(--bg);
  background: var(--ink);
  font-weight: 800;
}

.signal-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in oklch, var(--surface) 84%, transparent);
}

.signal-band p {
  max-width: 72ch;
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.08rem, 2vw, 1.45rem);
  line-height: 1.55;
}

.proof-line,
.requirement-rail {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.proof-line span,
.requirement-rail span {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0 var(--space-3);
  color: var(--bg);
  background: var(--accent-2);
  font-weight: 800;
}

.panel-run {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-4);
}

.scene-panel {
  min-height: 250px;
  padding: clamp(1.25rem, 3vw, 2rem);
  border-radius: 12px;
  background: color-mix(in oklch, var(--surface) 88%, var(--bg));
}

.scene-panel:nth-child(1) {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background:
    linear-gradient(160deg, color-mix(in oklch, var(--accent) 24%, var(--surface)), var(--surface)),
    var(--hero-image);
  background-size: cover;
  background-position: center;
}

.scene-panel h2,
.feature-strip h2,
.workspace-copy h2,
.download-console h2,
.backend-note h2 {
  font-size: clamp(1.7rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
}

.scene-panel p,
.feature-strip p,
.comparison-deck p,
.workspace-copy p,
.route-steps p,
.download-console p,
.faq-stack p,
.backend-note p {
  max-width: 70ch;
  margin: var(--space-4) 0 0;
  color: var(--muted);
  text-wrap: pretty;
}

.feature-strip {
  display: grid;
  gap: var(--space-4);
}

.feature-strip article {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
  min-height: 180px;
  padding: clamp(1.25rem, 3vw, 2.25rem);
  border-radius: 12px;
  background: color-mix(in oklch, var(--surface) 86%, var(--bg));
}

.feature-strip article:nth-child(even) {
  margin-left: clamp(0rem, 8vw, 8rem);
  background: color-mix(in oklch, var(--surface) 72%, var(--accent));
}

.feature-index,
.route-steps span {
  display: grid;
  place-items: center;
  width: fit-content;
  min-width: 58px;
  height: 58px;
  padding: 0 var(--space-3);
  border-radius: 999px;
  color: var(--bg);
  background: var(--accent);
  font-family: Bahnschrift, "Arial Narrow", Arial, sans-serif;
  font-weight: 800;
}

.comparison-deck {
  display: grid;
  grid-template-columns: 1fr 1.45fr 1fr;
  gap: var(--space-3);
  align-items: stretch;
}

.comparison-deck div {
  padding: var(--space-5);
  border-radius: 12px;
  background: color-mix(in oklch, var(--surface) 82%, transparent);
}

.comparison-deck div:nth-child(2) {
  color: var(--bg);
  background: var(--ink);
}

.workspace-scene {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: var(--space-5);
  align-items: center;
}

.wide-image {
  min-height: clamp(280px, 44vw, 520px);
  border-radius: 14px;
  background:
    linear-gradient(90deg, transparent, color-mix(in oklch, var(--bg) 72%, transparent)),
    var(--hero-image);
  background-size: cover;
  background-position: center;
  clip-path: polygon(0 0, 92% 0, 100% 18%, 88% 100%, 0 100%);
}

.workspace-copy,
.backend-note {
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border-radius: 12px;
  background: color-mix(in oklch, var(--surface) 86%, transparent);
}

.route-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.route-steps article {
  padding: var(--space-5);
  border-radius: 12px;
  background: color-mix(in oklch, var(--surface) 82%, transparent);
}

.download-console {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1.05fr);
  gap: var(--space-5);
  align-items: stretch;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border-radius: 14px;
  background:
    radial-gradient(circle at 95% 10%, color-mix(in oklch, var(--accent-2) 20%, transparent), transparent 18rem),
    color-mix(in oklch, var(--surface) 88%, transparent);
}

.download-console > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.action-status,
.form-status {
  min-height: 1.6em;
  margin-top: var(--space-4);
  color: var(--ink);
  font-weight: 800;
}

.handoff-form {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: 12px;
  background: color-mix(in oklch, var(--bg) 76%, var(--surface));
}

.handoff-form h3 {
  font-size: clamp(1.25rem, 2.5vw, 2rem);
}

.handoff-form label {
  display: grid;
  gap: var(--space-2);
  color: var(--muted);
  font-weight: 800;
}

.handoff-form input,
.handoff-form select {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 var(--space-3);
  color: var(--ink);
  background: var(--surface);
}

.requirement-rail {
  justify-content: center;
}

.faq-stack {
  display: grid;
  gap: var(--space-3);
}

.faq-stack details {
  border-radius: 12px;
  background: color-mix(in oklch, var(--surface) 84%, transparent);
}

.faq-stack summary {
  min-height: 64px;
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: 0 var(--space-5);
  font-weight: 900;
}

.faq-stack p {
  padding: 0 var(--space-5) var(--space-5);
}

.backend-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6) 0;
  color: var(--muted);
}

.cursor-light {
  position: fixed;
  left: var(--mx, 50%);
  top: var(--my, 50%);
  z-index: 20;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, color-mix(in oklch, var(--accent) 16%, transparent), transparent 68%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 220ms var(--ease-out);
}

@media (pointer: fine) {
  body.has-pointer .cursor-light {
    opacity: 1;
  }
}

.js [data-reveal] {
  opacity: 1;
  transform: translateY(10px);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 560ms var(--ease-out), transform 560ms var(--ease-out), filter 560ms var(--ease-out);
  transition-delay: calc(var(--i, 0) * 55ms);
}

body.is-loaded .hero-copy {
  animation: heroCopy 720ms var(--ease-out) both;
}

body.is-loaded .creative-stage {
  animation: heroStage 860ms var(--ease-out) both;
}

.button.is-loading {
  cursor: wait;
  filter: saturate(0.7);
}

.button.is-success {
  background: oklch(72% 0.18 154);
}

.button.is-error {
  background: oklch(62% 0.23 25);
}

.theme-lantern .hero-scene::after,
.theme-gift .hero-scene::after {
  clip-path: polygon(0 55%, 30% 22%, 56% 48%, 82% 14%, 100% 42%, 100% 100%, 0 100%);
}

.theme-mission .wide-image,
.theme-flag .wide-image,
.theme-pilot .wide-image {
  clip-path: polygon(0 0, 100% 0, 92% 100%, 8% 100%);
}

@keyframes heroCopy {
  from {
    transform: translateY(18px);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes heroStage {
  from {
    transform: translateX(18px) scale(0.98);
  }
  to {
    transform: translateX(0) scale(1);
  }
}

@keyframes floatStage {
  from {
    transform: translateY(-8px) rotate(-1.5deg);
  }
  to {
    transform: translateY(10px) rotate(1deg);
  }
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
    position: sticky;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    order: 4;
    position: static;
    width: 100%;
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    margin-left: 0;
  }

  .site-nav.is-open {
    display: flex;
  }

  .top-action {
    display: none;
  }

  .hero-scene,
  .panel-run,
  .workspace-scene,
  .download-console,
  .comparison-deck {
    grid-template-columns: 1fr;
  }

  .hero-scene {
    min-height: auto;
  }

  h1 {
    max-width: 14ch;
  }

  .creative-stage {
    min-height: 300px;
  }

  .panel-run .scene-panel:nth-child(1) {
    grid-row: auto;
  }

  .feature-strip article:nth-child(even) {
    margin-left: 0;
  }

  .route-steps {
    grid-template-columns: 1fr;
  }

  .backend-note,
  .signal-band {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .page-shell {
    width: min(100% - 22px, 1220px);
  }

  .brand-lockup span:last-child {
    display: none;
  }

  .hero-scene {
    padding: var(--space-5);
    border-radius: 10px;
  }

  .hero-copy {
    padding: var(--space-4);
    border-radius: 10px;
    background: color-mix(in oklch, var(--bg) 78%, transparent);
  }

  h1 {
    font-size: clamp(2.15rem, 13vw, 4.4rem);
  }

  .hero-actions,
  .button,
  .download-console .button {
    width: 100%;
  }

  .feature-strip article {
    grid-template-columns: 1fr;
  }

  .wide-image {
    clip-path: none;
  }

  .creative-stage figcaption {
    left: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
    max-width: none;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .atmosphere,
  .cursor-light {
    display: none;
  }
}