:root {
  --canvas: #ffffff;
  --ink: #050505;
  --line: #d9d9d9;
  --accent: #0052cc;
  --accent-soft: #edf3ff;
  --success: #067647;
  --warn: #b54708;
  --danger: #b42318;
  --surface: #fafafa;
  --radius: 4px;
  --container: 1200px;
  --section: 64px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Pretendard", "Noto Sans KR", "Spoqa Han Sans Neo", system-ui, sans-serif;
  background: var(--canvas);
  color: var(--ink);
  line-height: 1.6;
}

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

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

button {
  cursor: pointer;
}

.page-shell {
  min-height: 100vh;
}

.topbar {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
  padding: 20px 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand,
.nav-links a {
  color: var(--ink);
  text-decoration: none;
}

.brand {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: 14px;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms var(--ease);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

main section {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
  padding: var(--section) 0;
  border-top: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: 32px;
  align-items: start;
  border-top: 0;
  padding-top: 24px;
}

.eyebrow,
.strip-label,
.metric-label,
.score-label {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.insight-strip h2,
.framework-copy h2 {
  margin: 0;
  font-size: clamp(2.8rem, 5vw, 4.8rem);
  line-height: 0.96;
  font-weight: 700;
  max-width: 12ch;
}

.hero-text,
.framework-copy p,
.insight-strip p,
.strip-box p,
.framework-card p,
.result-note p,
#score-summary {
  font-size: 16px;
}

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

.button {
  min-height: 44px;
  padding: 12px 20px;
  border-radius: var(--radius);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  transition: transform 220ms var(--ease), background-color 220ms var(--ease), color 220ms var(--ease), border-color 220ms var(--ease);
}

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

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

.button-secondary {
  background: var(--canvas);
  border-color: var(--ink);
  color: var(--ink);
}

.button-tertiary {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
}

.signal-list {
  list-style: none;
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 28px 0 0;
}

.signal-list li {
  padding-left: 18px;
  position: relative;
}

.signal-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  background: var(--accent);
}

.hero-stage {
  display: grid;
  gap: 20px;
  transform: translateY(26px);
}

.hero-stage-image-wrap,
.framework-media,
.score-card,
.form-shell,
.result-shell,
.strip-box,
.framework-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--canvas);
}

.hero-stage-image {
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.image-caption {
  padding: 10px 14px 14px;
  font-size: 12px;
  border-top: 1px solid var(--line);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.hero-metrics article,
.strip-box,
.framework-card,
.score-card,
.result-note,
.form-shell,
.result-shell {
  padding: 18px;
}

.metric-value,
#score-value {
  font-family: "SFMono-Regular", "Courier New", monospace;
  display: block;
}

.metric-value {
  font-size: 16px;
  text-align: right;
}

.insight-strip {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 32px;
}

.strip-boxes {
  display: grid;
  gap: 16px;
  align-content: start;
}

.strip-box span,
.framework-card span {
  display: inline-block;
  margin-bottom: 12px;
  font-family: "SFMono-Regular", "Courier New", monospace;
  font-size: 14px;
  color: var(--accent);
}

.diagnosis-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 24px;
  align-items: start;
}

.section-head {
  margin-bottom: 24px;
}

.section-head h2,
.result-columns h3,
.result-note h3,
.framework-card h3,
.block-title {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}

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

.diagnosis-form,
.form-block,
.result-columns,
.framework {
  display: grid;
  gap: 18px;
}

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

.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 8px;
}

label span,
.block-title {
  font-size: 14px;
}

input[type="text"],
input[type="month"],
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 12px 14px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--canvas);
  color: var(--ink);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

output {
  font-family: "SFMono-Regular", "Courier New", monospace;
  text-align: right;
}

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

.check-grid label {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.check-grid input {
  margin-top: 3px;
}

.result-shell {
  position: sticky;
  top: 16px;
  background: var(--canvas);
}

.score-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

#score-value {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  line-height: 1;
}

#score-band {
  font-size: 16px;
}

.score-bar {
  margin: 18px 0;
  height: 10px;
  background: var(--accent-soft);
  overflow: hidden;
  border-radius: var(--radius);
}

#score-fill {
  width: 62%;
  height: 100%;
  background: var(--accent);
  transition: width 420ms var(--ease);
}

.bullet-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

#share-text {
  width: 100%;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 14px;
  background: var(--surface);
  color: var(--ink);
}

.framework {
  grid-template-columns: minmax(0, 0.9fr) minmax(260px, 0.65fr) minmax(0, 0.8fr);
  align-items: start;
}

.framework-media img {
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.framework-cards {
  display: grid;
  gap: 16px;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

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

.stagger-1 {
  transition-delay: 70ms;
}

.stagger-2 {
  transition-delay: 140ms;
}

.stagger-3 {
  transition-delay: 210ms;
}

.stagger-4 {
  transition-delay: 280ms;
}

.button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.nav-links a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (max-width: 960px) {
  .hero,
  .insight-strip,
  .diagnosis-grid,
  .framework,
  .two-up,
  .three-up,
  .check-grid,
  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .result-shell {
    position: static;
  }

  .hero h1,
  .insight-strip h2,
  .framework-copy h2 {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}