:root {
  --page: #f7f7f7;
  --ink: #111111;
  --ink-soft: #1f1f1f;
  --muted: #5a5a5a;
  --muted-2: #777777;
  --line: #d8d8d8;
  --line-strong: #b8b8b8;
  --panel: #ffffff;
  --panel-soft: #ececec;
  --panel-dark: #1f1f1f;
  --panel-darker: #111111;
  --accent: #3c3c3c;
  --accent-soft: #d8d8d8;
  --safe: #111111;
  --radius-section: 0.75rem;
  --radius-control: 0.55rem;
  --radius-chip: 0.35rem;
  --radius-product: 1.75rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --shadow-control: 0 0.4rem 1rem rgb(17 17 17 / 8%);
  --shadow-panel: 0 1.2rem 3rem rgb(17 17 17 / 12%);
  --shadow-stage: 0 2.8rem 6rem rgb(17 17 17 / 24%);
  --ease-apple: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-press: cubic-bezier(0.2, 0, 0, 1);
  --motion-press: 100ms;
  --motion-fast: 180ms;
  --motion-normal: 320ms;
  --motion-slow: 420ms;
  color: var(--ink);
  background: var(--page);
  font-family: "Aptos", "Segoe UI Variable Text", "Pretendard Variable", "Noto Sans KR", system-ui, sans-serif;
  font-optical-sizing: auto;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  background: var(--page);
}
a { color: inherit; }
a:focus-visible,
button:focus-visible {
  outline: 0.18rem solid var(--ink);
  outline-offset: 0.2rem;
}
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p, li, dl, dd, figure { margin: 0; }
h1, h2, h3 {
  font-family: "Aptos Display", "Segoe UI Variable Display", "Pretendard Variable", "Noto Sans KR", system-ui, sans-serif;
  font-optical-sizing: auto;
  letter-spacing: -0.04em;
  text-wrap: balance;
  word-break: keep-all;
}
p, li {
  letter-spacing: 0.002em;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.skip-link {
  position: fixed;
  left: var(--space-3);
  top: var(--space-3);
  z-index: 30;
  transform: translateY(-200%);
  border-radius: var(--radius-control);
  background: var(--ink);
  color: var(--page);
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  transition: transform var(--motion-normal) var(--ease-apple);
}
.skip-link:focus { transform: translateY(0); }

.site-shell {
  width: min(1180px, calc(100% - clamp(1.25rem, 6vw, 6rem)));
  margin-inline: auto;
}
.site-topbar,
.brand-lockup,
.nav-links,
.hero-actions,
.meta-row,
.footer-links,
.download-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}
.site-topbar {
  position: sticky;
  top: var(--space-3);
  z-index: 12;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-3);
  border: 1px solid rgb(216 216 216 / 72%);
  border-radius: var(--radius-section);
  background: rgb(247 247 247 / 72%);
  padding: var(--space-2) var(--space-3);
  box-shadow: var(--shadow-control);
  backdrop-filter: blur(22px) saturate(150%);
}
.brand-lockup {
  min-height: 2.6rem;
  gap: var(--space-3);
  color: var(--ink);
  text-decoration: none;
}
.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.18rem;
  padding: 0.18rem;
  border-radius: var(--radius-control);
  background: var(--ink);
  box-shadow: 0 0.5rem 1.2rem rgb(17 17 17 / 18%);
}
.brand-mark span { border-radius: 0.16rem; background: #ffffff; }
.brand-mark span:nth-child(2) { background: #4c4c4c; }
.brand-mark span:nth-child(3) { background: #5a5a5a; }
.brand-mark span:nth-child(4) { background: #f7f7f7; }
.brand-name { font-weight: 820; letter-spacing: -0.03em; }
.nav-links { gap: var(--space-1); }
.nav-links a,
.site-button {
  border-radius: var(--radius-control);
  font-weight: 760;
  text-decoration: none;
  transition:
    transform var(--motion-fast) var(--ease-apple),
    background-color var(--motion-fast) var(--ease-apple),
    border-color var(--motion-fast) var(--ease-apple),
    color var(--motion-fast) var(--ease-apple),
    box-shadow var(--motion-fast) var(--ease-apple),
    filter var(--motion-fast) var(--ease-apple);
  will-change: transform;
}
.nav-links a {
  color: var(--muted);
  padding: var(--space-2) var(--space-3);
}
.nav-links a:hover {
  transform: translateY(-0.06rem);
  background: rgb(17 17 17 / 7%);
  color: var(--ink);
}
.nav-links a:active {
  transform: scale(0.97);
  transition-duration: var(--motion-press);
}
.site-button {
  display: inline-flex;
  min-height: 2.9rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  padding: 0 var(--space-5);
  text-align: center;
  overflow-wrap: anywhere;
}
.site-button.primary {
  background: var(--ink);
  color: #ffffff;
  border-color: var(--ink);
  box-shadow: 0 0.9rem 1.8rem rgb(17 17 17 / 18%);
}
.site-button.secondary {
  background: rgb(255 255 255 / 78%);
  color: var(--ink);
  backdrop-filter: blur(18px) saturate(145%);
}
.site-button:hover {
  transform: translateY(-0.1rem);
  box-shadow: var(--shadow-control);
}
.site-button:active {
  transform: scale(0.97);
  filter: brightness(0.96);
  transition-duration: var(--motion-press);
  transition-timing-function: var(--ease-press);
}

.site-badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid rgb(216 216 216 / 78%);
  border-radius: var(--radius-chip);
  background: rgb(255 255 255 / 72%);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 760;
  letter-spacing: 0.012em;
  padding: var(--space-2) var(--space-3);
  box-shadow: 0 0.35rem 0.9rem rgb(17 17 17 / 5%);
  backdrop-filter: blur(16px) saturate(150%);
}
.status-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--safe);
}

.hero {
  display: grid;
  min-height: min(760px, calc(100dvh - 6rem));
  grid-template-columns: minmax(18rem, 0.82fr) minmax(22rem, 1.18fr);
  gap: clamp(var(--space-8), 7vw, 6rem);
  align-items: center;
  padding: clamp(var(--space-8), 7vw, var(--space-16)) 0 var(--space-12);
}
.hero-copy { display: grid; gap: var(--space-6); }
.hero h1 {
  max-width: 15ch;
  font-size: clamp(2.3rem, 4vw, 2.5rem);
  font-weight: 860;
  line-height: 1.04;
  letter-spacing: -0.055em;
}
.headline-line { display: block; }
.nowrap-line { white-space: nowrap; }
.hero-lede {
  max-width: 38rem;
  color: var(--muted);
  font-size: clamp(1.04rem, 1.8vw, 1.28rem);
  line-height: 1.72;
  letter-spacing: -0.004em;
  text-wrap: pretty;
}
.hero-actions,
.meta-row,
.footer-links,
.download-actions { gap: var(--space-3); }
.meta-row {
  color: var(--muted);
  font-size: 0.92rem;
}
.meta-row span {
  position: relative;
  padding-left: 0.9rem;
}
.meta-row span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 0.32rem;
  height: 0.32rem;
  border-radius: 50%;
  background: var(--accent);
}

.hero-stage {
  position: relative;
  min-height: 31rem;
  display: grid;
  align-items: center;
  perspective: 1000px;
}
.hero-stage::before {
  content: "";
  position: absolute;
  inset: 10% 2% 1% 12%;
  border-radius: var(--radius-section);
  background: #d8d8d8;
  transform: rotate(-3.6deg) translateY(0.5rem);
  box-shadow: 0 1.1rem 2.4rem rgb(17 17 17 / 10%);
}
.stage-window {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border: 1px solid rgb(255 255 255 / 12%);
  border-radius: var(--radius-section);
  background: rgb(31 31 31 / 92%);
  box-shadow: var(--shadow-stage);
  color: #f7f7f7;
  padding: var(--space-6);
  backdrop-filter: blur(24px) saturate(130%);
  transform: translateZ(0);
}
.stage-window::before,
.stage-window::after {
  content: "";
  position: absolute;
  pointer-events: none;
}
.stage-window::before {
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 18%), inset 0 -1px 0 rgb(0 0 0 / 44%);
}
.stage-window::after {
  width: 38%;
  height: 120%;
  right: 6%;
  top: -10%;
  background: rgb(255 255 255 / 5%);
  transform: rotate(17deg);
}
.window-bar,
.stage-dock {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #c8c8c8;
  font-size: 0.76rem;
  font-weight: 760;
  letter-spacing: 0.014em;
}
.stage-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  grid-template-areas:
    "clock meter"
    "theme theme";
  gap: var(--space-4);
  margin: var(--space-8) 0 var(--space-6);
}
.stage-card {
  display: grid;
  min-height: 8rem;
  gap: var(--space-3);
  align-content: center;
  border: 1px solid rgb(255 255 255 / 12%);
  border-radius: var(--radius-section);
  background: rgb(17 17 17 / 72%);
  padding: var(--space-5);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 8%), 0 0.8rem 1.8rem rgb(0 0 0 / 16%);
  backdrop-filter: blur(18px);
}
.stage-card span {
  color: #b8b8b8;
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.018em;
}
.stage-card strong {
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
}
.clock-card { grid-area: clock; }
.meter-card { grid-area: meter; }
.theme-card { grid-area: theme; min-height: 10rem; }
.meter-card div { display: grid; gap: var(--space-2); }
.meter-card b {
  color: #f7f7f7;
  font-size: 0.78rem;
  letter-spacing: 0.01em;
}
.meter-card i {
  position: relative;
  display: block;
  width: 100%;
  height: 0.2rem;
  overflow: hidden;
  border-radius: var(--radius-chip);
  background: rgb(255 255 255 / 16%);
}
.meter-card i::before {
  content: "";
  display: block;
  height: 100%;
  border-radius: var(--radius-chip);
  background: #ffffff;
  transition: transform var(--motion-normal) var(--ease-apple);
  transform-origin: left center;
}
.meter-card .meter-cpu::before { width: 18%; }
.meter-card .meter-ram::before { width: 42%; }
.stage-dock {
  position: relative;
  z-index: 1;
  justify-content: center;
  gap: var(--space-2);
  width: min(22rem, 72%);
  margin-inline: auto;
  border: 1px solid rgb(255 255 255 / 7%);
  border-radius: var(--radius-control);
  background: rgb(0 0 0 / 34%);
  padding: var(--space-2);
  backdrop-filter: blur(18px);
}
.stage-dock span {
  width: 0.5rem;
  height: 0.5rem;
  border: 1px solid rgb(255 255 255 / 72%);
  border-radius: 50%;
}
.control-stack {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 0.8rem;
  display: grid;
  gap: var(--space-2);
}
.control-chip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: max-content;
  border: 1px solid rgb(216 216 216 / 76%);
  border-radius: var(--radius-chip);
  background: rgb(255 255 255 / 82%);
  box-shadow: var(--shadow-control);
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 760;
  letter-spacing: 0.006em;
  padding: var(--space-2) var(--space-3);
  backdrop-filter: blur(18px) saturate(140%);
  transition: transform var(--motion-normal) var(--ease-apple), box-shadow var(--motion-normal) var(--ease-apple);
}
.control-chip span {
  display: grid;
  width: 1.4rem;
  height: 1.4rem;
  place-items: center;
  border-radius: var(--radius-chip);
  background: var(--panel-soft);
  color: var(--ink);
}
.control-chip.active {
  color: var(--ink);
  transform: translateX(-1.2rem);
  box-shadow: 0 0.9rem 2rem rgb(17 17 17 / 13%);
}

.section { padding: clamp(var(--space-10), 8vw, var(--space-16)) 0; }
.section-heading {
  display: grid;
  max-width: 46rem;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}
.split-heading {
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.78fr);
  max-width: none;
  align-items: end;
}
.section-heading h2,
.policy-hero h1 {
  font-size: clamp(1.9rem, 4vw, 3.4rem);
  line-height: 1.04;
  letter-spacing: -0.055em;
}
.section-heading p,
.task-panel p,
.preview-notes p,
.rollback-steps p,
.footer-copy,
.policy-lede {
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.74;
  text-wrap: pretty;
}
.task-board {
  display: grid;
  grid-template-columns: 1.1fr 0.75fr;
  grid-template-areas:
    "large small"
    "large dark";
  gap: var(--space-5);
}
.task-panel,
.policy-block {
  border: 1px solid var(--line);
  border-radius: var(--radius-section);
  background: rgb(255 255 255 / 82%);
  backdrop-filter: blur(18px);
}
.task-panel {
  position: relative;
  overflow: hidden;
  display: grid;
  min-height: 16rem;
  gap: var(--space-4);
  align-content: start;
  padding: clamp(var(--space-5), 4vw, var(--space-8));
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 72%);
}
.task-panel.large { grid-area: large; min-height: 34rem; }
.task-panel.dark {
  grid-area: dark;
  background: var(--panel-dark);
  color: #f7f7f7;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 10%), var(--shadow-panel);
}
.task-panel:not(.large):not(.dark) { grid-area: small; }
.panel-kicker {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 820;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.task-panel.dark .panel-kicker { color: var(--accent-soft); }
.task-panel h3 {
  max-width: 20ch;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  line-height: 1.1;
  letter-spacing: -0.045em;
}
.task-panel.dark p { color: #c8c8c8; }
.mini-canvas {
  display: grid;
  min-height: 15rem;
  align-content: end;
  gap: var(--space-4);
  margin-top: auto;
  border: 1px solid rgb(17 17 17 / 8%);
  border-radius: var(--radius-section);
  background: #d8d8d8;
  padding: var(--space-5);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 44%);
}
.mini-widget {
  display: block;
  width: 48%;
  height: 3.3rem;
  border: 1px solid rgb(17 17 17 / 12%);
  border-radius: var(--radius-control);
  background: rgb(255 255 255 / 70%);
  box-shadow: var(--shadow-control);
}
.mini-widget.wide { width: 68%; height: 4.5rem; }
.mini-widget.dim { width: 56%; opacity: 0.62; justify-self: end; }

.preview-composition {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 0.36fr);
  gap: var(--space-5);
  align-items: stretch;
}
.product-frame {
  overflow: hidden;
  border: 1px solid #cfcfcf;
  border-radius: var(--radius-section);
  background: var(--panel-dark);
  box-shadow: var(--shadow-panel);
}
.product-frame img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.preview-notes {
  display: grid;
  gap: var(--space-3);
}
.preview-notes article {
  display: grid;
  gap: var(--space-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-section);
  background: rgb(255 255 255 / 78%);
  padding: var(--space-5);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 72%);
  backdrop-filter: blur(16px);
}
.preview-notes span {
  width: 2rem;
  height: 0.25rem;
  border-radius: var(--radius-chip);
  background: var(--accent);
}
.preview-notes b {
  color: var(--ink);
  font-size: 1.04rem;
  letter-spacing: -0.02em;
}

.rollback-card {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(18rem, 1.2fr);
  gap: var(--space-8);
  align-items: center;
  border: 1px solid rgb(255 255 255 / 10%);
  border-radius: var(--radius-section);
  background: var(--ink);
  color: #f7f7f7;
  padding: clamp(var(--space-6), 6vw, var(--space-12));
  box-shadow: var(--shadow-stage);
}
.rollback-card .section-heading { margin-bottom: 0; }
.rollback-card p { color: #d8d8d8; }
.rollback-card .site-badge {
  border-color: rgb(255 255 255 / 16%);
  background: rgb(255 255 255 / 8%);
  color: #f7f7f7;
}
.rollback-steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}
.rollback-steps li {
  display: grid;
  min-height: 10rem;
  gap: var(--space-2);
  align-content: start;
  border: 1px solid rgb(255 255 255 / 13%);
  border-radius: var(--radius-section);
  background: rgb(255 255 255 / 7%);
  padding: var(--space-5);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 8%);
}
.rollback-steps span {
  color: var(--accent-soft);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.08em;
}
.rollback-steps b { color: #ffffff; }

.download-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-6);
  align-items: center;
  border-radius: var(--radius-section);
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: clamp(var(--space-6), 5vw, var(--space-10));
  box-shadow: var(--shadow-panel);
}
.download-band p { color: var(--muted); line-height: 1.7; }
.metadata {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}
.metadata div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  border-top: 1px solid var(--line);
  padding-top: var(--space-3);
}
.metadata dt { color: var(--muted); }
.metadata dd { font-weight: 780; text-align: right; }

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-6);
  padding: var(--space-10) 0 var(--space-12);
}
.footer-links a {
  color: var(--muted);
  font-weight: 730;
  text-decoration: none;
}
.footer-links a:hover { color: var(--ink); }

.policy-page .site-shell { width: min(920px, calc(100% - clamp(1.25rem, 6vw, 5rem))); }
.policy-hero { display: grid; gap: var(--space-5); padding: clamp(var(--space-8), 10vw, 6rem) 0 var(--space-8); }
.policy-stack { display: grid; gap: var(--space-4); padding-bottom: var(--space-12); }
.policy-block { display: grid; gap: var(--space-4); padding: clamp(var(--space-5), 4vw, var(--space-8)); }
.policy-block h2 { font-size: clamp(1.35rem, 3vw, 2rem); line-height: 1.15; }
.policy-block p,
.policy-block li { color: var(--muted); font-size: 1rem; line-height: 1.75; }

.reveal {
  animation: material-rise var(--motion-slow) var(--ease-apple) both;
  transform-origin: 50% 80%;
}
.hero-stage.reveal { animation-delay: 80ms; }

@keyframes material-rise {
  from { opacity: 0; transform: translateY(1rem) scale(0.985); filter: blur(0.2rem); }
  to { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }
  .reveal { animation-name: reduced-fade; }
  @keyframes reduced-fade {
    from { opacity: 0; }
    to { opacity: 1; }
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-topbar,
  .site-badge,
  .site-button.secondary,
  .stage-window,
  .stage-card,
  .stage-dock,
  .control-chip,
  .task-panel,
  .preview-notes article {
    background-color: var(--panel);
    backdrop-filter: none;
  }
  .stage-window,
  .stage-card,
  .stage-dock {
    background-color: var(--panel-dark);
  }
  .task-panel.dark {
    background-color: var(--panel-dark);
  }
}

@media (prefers-contrast: more) {
  :root {
    --line: #8a8a8a;
    --muted: #3c3c3c;
  }
  .site-topbar,
  .site-badge,
  .site-button,
  .task-panel,
  .preview-notes article,
  .download-band {
    border-color: var(--line-strong);
  }
}

@media (max-width: 980px) {
  .site-topbar {
    align-items: flex-start;
    border-radius: var(--radius-section);
    flex-direction: column;
  }
  .hero,
  .split-heading,
  .task-board,
  .preview-composition,
  .rollback-card,
  .download-band,
  .site-footer {
    grid-template-columns: 1fr;
  }
  .hero { min-height: auto; padding-top: var(--space-6); }
  .hero-stage { min-height: 28rem; }
  .control-stack { right: var(--space-4); }
  .task-board { grid-template-areas: "large" "small" "dark"; }
  .task-panel.large { min-height: 28rem; }
  .rollback-steps { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .site-shell,
  .policy-page .site-shell { width: min(100% - 1.25rem, 1180px); }
  .nav-links,
  .hero-actions,
  .site-button { width: 100%; }
  .nav-links a { padding-inline: var(--space-2); }
  .hero h1 { font-size: clamp(2.25rem, 10vw, 2.5rem); }
  .hero-stage { min-height: auto; }
  .hero-stage::before { display: none; }
  .stage-window {
    border-radius: var(--radius-section);
    padding: var(--space-4);
  }
  .stage-grid {
    grid-template-columns: 1fr;
    grid-template-areas: "clock" "meter" "theme";
    margin-block: var(--space-5);
  }
  .control-stack { position: static; margin-top: var(--space-3); }
  .control-chip,
  .control-chip.active { width: 100%; transform: none; }
  .section-heading h2,
  .policy-hero h1 { font-size: clamp(1.65rem, 9vw, 2.45rem); }
  .metadata { grid-template-columns: 1fr; }
  .metadata div { display: grid; }
  .metadata dd { text-align: left; }
}