:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --panel-alt: #edf2ff;
  --text: #111827;
  --muted: #5b6475;
  --line: #d8deea;
  --ink-soft: #eff3fa;
  --accent: #175cff;
  --accent-deep: #0f2c7a;
  --critical: #d92d20;
  --high: #f76707;
  --medium: #0f766e;
  --low: #4f46e5;
  --good: #1d7a42;
  --radius: 18px;
  --radius-sm: 12px;
  --container: min(1200px, calc(100vw - 40px));
  --transition: 260ms cubic-bezier(.22,1,.36,1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

img {
  display: block;
  width: 100%;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  background: #111827;
  color: #ffffff;
  padding: 10px 14px;
  border-radius: 12px;
  z-index: 10;
}

.skip-link:focus {
  top: 16px;
}

.site-header,
.hero,
.feature-band,
.workspace,
.status-strip,
.results,
.checks,
.site-footer {
  width: var(--container);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  margin-top: 12px;
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(17,24,39,0.08);
  border-radius: 999px;
}

.header-brand {
  display: grid;
  gap: 2px;
}

.header-brand strong {
  font-size: 18px;
}

.brand-kicker,
.eyebrow,
.metric-label,
.run-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.top-nav a {
  min-height: 44px;
  padding: 10px 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.top-nav a:hover,
.top-nav a:focus-visible {
  background: #ffffff;
  border-color: var(--line);
  transform: translateY(-2px);
}

.nav-external {
  background: #111827;
  color: #ffffff;
}

.hero {
  padding: 52px 0 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 36px;
  align-items: start;
}

.hero-copy {
  padding: 20px 0 20px 4px;
}

.hero-copy h1,
.feature-band-header h2,
.section-heading h2,
.results-head h2 {
  margin: 0;
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.hero-copy h1 {
  font-size: clamp(42px, 7vw, 78px);
  max-width: 10ch;
}

.hero-text {
  margin: 24px 0 0;
  max-width: 620px;
  font-size: 18px;
  color: var(--muted);
}

.hero-actions,
.results-actions,
.run-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  min-height: 48px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}

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

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

.button.secondary {
  background: #ffffff;
  border-color: var(--line);
}

.button.tertiary {
  background: transparent;
  border-color: rgba(23,92,255,0.24);
  color: var(--accent-deep);
}

.trust-strip {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-strip li {
  padding: 10px 14px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--line);
  font-size: 14px;
}

.hero-visual {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 18px;
  align-items: start;
}

.hero-image-card,
.metric-card,
.panel,
.summary-card,
.feature-card,
.check-card,
.side-cta,
.mini-note,
.status-strip,
.sample-panel {
  background: var(--panel);
  border: 1px solid var(--line);
}

.hero-image-card,
.metric-card,
.panel,
.summary-card,
.feature-card,
.check-card,
.side-cta,
.mini-note,
.sample-panel,
.dropzone,
textarea,
select,
.tab,
.status-strip {
  border-radius: var(--radius);
}

.hero-image-main {
  overflow: hidden;
  transform: translateY(12px);
  animation: floatCard 6s ease-in-out infinite;
}

.hero-image-main img,
.feature-card img,
.hero-image-side img {
  aspect-ratio: 1.15 / 1;
  object-fit: cover;
}

.hero-image-main figcaption {
  padding: 14px 18px 18px;
  font-size: 14px;
  color: var(--muted);
}

.hero-aside {
  display: grid;
  gap: 14px;
}

.metric-card,
.summary-card {
  padding: 18px;
}

.metric-card strong {
  display: block;
  margin-top: 8px;
  font-size: 18px;
  line-height: 1.3;
}

.metric-card-accent {
  background: var(--panel-alt);
}

.hero-image-side {
  overflow: hidden;
  transform: translateX(12px);
}

.feature-band {
  padding: 40px 0 24px;
}

.feature-band-header {
  max-width: 720px;
}

.feature-band-header h2,
.section-heading h2,
.results-head h2 {
  font-size: clamp(28px, 4.5vw, 48px);
}

.feature-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
  align-items: start;
}

.feature-card {
  overflow: hidden;
}

.feature-card div,
.check-card,
.sample-panel,
.side-cta,
.mini-note {
  padding: 20px;
}

.offset-card {
  transform: translateY(42px);
}

.workspace {
  padding: 82px 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.8fr);
  gap: 20px;
  align-items: start;
}

.panel {
  padding: 24px;
}

.section-heading.compact h2 {
  font-size: 28px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.tab {
  min-height: 44px;
  padding: 10px 16px;
  background: #edf2ff;
  border: 1px solid transparent;
  cursor: pointer;
}

.tab:hover,
.tab:focus-visible {
  border-color: var(--accent);
  background: #ffffff;
}

.tab.is-active {
  background: #111827;
  color: #ffffff;
}

.tab-panel {
  display: none;
  margin-top: 18px;
}

.tab-panel.is-active {
  display: block;
}

.dropzone {
  min-height: 220px;
  padding: 26px;
  display: grid;
  gap: 8px;
  place-items: center;
  text-align: center;
  border: 1px dashed var(--accent);
  background: linear-gradient(135deg, rgba(23,92,255,0.08), rgba(255,255,255,0.96));
}

.dropzone:hover,
.dropzone:focus-within {
  border-color: var(--accent-deep);
  background: linear-gradient(135deg, rgba(23,92,255,0.12), rgba(255,255,255,0.98));
}

.dropzone input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.dropzone-kicker {
  font-size: 13px;
  color: var(--accent-deep);
}

.dropzone-title {
  font-size: 24px;
}

.dropzone-meta,
.helper-text,
.expect-list span,
.feature-card p,
.check-card p,
.site-footer p,
.footer-meta a,
.filter-label,
.empty-state,
#status-message,
.insight-box p,
.sample-panel p {
  color: var(--muted);
}

.input-label {
  display: inline-block;
  margin-top: 4px;
  margin-bottom: 10px;
  font-weight: 700;
}

textarea {
  width: 100%;
  min-height: 280px;
  padding: 18px;
  border: 1px solid var(--line);
  background: #fbfcff;
  resize: vertical;
}

textarea:focus-visible,
select:focus-visible,
.tab:focus-visible,
.dropzone:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.run-bar {
  margin-top: 22px;
  padding: 18px;
  background: #111827;
  color: #ffffff;
  border-radius: var(--radius);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}

.expect-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.expect-list li {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.status-strip {
  margin-top: 24px;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.results {
  padding: 82px 0 30px;
}

.results-head,
.results-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  flex-wrap: wrap;
}

.summary-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.summary-card strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1;
}

.severity-critical {
  background: rgba(217,45,32,0.06);
}

.severity-high {
  background: rgba(247,103,7,0.08);
}

.severity-medium {
  background: rgba(15,118,110,0.08);
}

.results-layout {
  margin-top: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 20px;
  align-items: start;
}

.results-toolbar {
  margin-bottom: 18px;
}

select {
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: #ffffff;
}

.result-items {
  display: grid;
  gap: 14px;
}

.result-item {
  padding: 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #ffffff;
  display: grid;
  gap: 14px;
  transform-origin: top left;
  animation: resultIn 420ms var(--transition);
}

.result-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.result-title {
  font-size: 20px;
  margin: 0;
}

.result-meta,
.result-fix,
.result-reason {
  margin: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.badge-치명 { color: var(--critical); background: rgba(217,45,32,0.08); }
.badge-높음 { color: var(--high); background: rgba(247,103,7,0.12); }
.badge-보통 { color: var(--medium); background: rgba(15,118,110,0.12); }
.badge-낮음 { color: var(--low); background: rgba(79,70,229,0.12); }
.badge-양호 { color: var(--good); background: rgba(29,122,66,0.12); }

.result-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.result-columns div {
  padding: 14px;
  background: var(--ink-soft);
  border-radius: 12px;
}

.insight-box {
  padding: 18px;
  border-radius: var(--radius);
  background: #0f172a;
  color: #ffffff;
}

.insight-box p {
  color: rgba(255,255,255,0.82);
}

.side-cta {
  margin-top: 16px;
}

.side-cta a {
  margin-top: 16px;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--accent-deep);
  font-weight: 700;
}

.checks {
  padding: 50px 0 80px;
}

.checks-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.site-footer {
  padding: 0 0 60px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
}

.footer-meta {
  text-align: right;
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 800ms ease, transform 800ms ease;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(12px); }
  50% { transform: translateY(0); }
}

@keyframes resultIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 1023px) {
  .hero,
  .workspace,
  .results-layout,
  .feature-grid,
  .checks-grid,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero-visual,
  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .offset-card,
  .hero-image-side {
    transform: none;
  }

  .status-strip,
  .run-bar,
  .site-footer,
  .site-header {
    border-radius: 24px;
  }
}

@media (max-width: 767px) {
  .site-header {
    position: static;
    margin-top: 0;
    width: calc(100vw - 24px);
    margin-inline: 12px;
    padding: 16px;
  }

  .hero,
  .feature-band,
  .workspace,
  .status-strip,
  .results,
  .checks,
  .site-footer {
    width: calc(100vw - 24px);
  }

  .hero {
    padding-top: 28px;
  }

  .hero-copy h1 {
    max-width: 100%;
  }

  .hero-visual,
  .summary-grid,
  .result-columns {
    grid-template-columns: 1fr;
  }

  .results-head,
  .results-toolbar,
  .run-bar,
  .status-strip {
    align-items: start;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .button,
  .tab,
  select,
  .top-nav a {
    width: 100%;
  }
}