:root {
  --canvas: #ffffff;
  --ink: #000000;
  --muted: #3a3a3a;
  --line: #e5e5e5;
  --line-strong: #bdbdbd;
  --surface: #f7f9fc;
  --signal: #0052cc;
  --signal-ink: #ffffff;
  --critical: #b00020;
  --warning: #8a5a00;
  --success: #167c3a;
  --focus: #111111;
  --radius: 4px;
  --section: 64px;
  --gap: 24px;
  --font: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", Arial, sans-serif;
  --mono: "SFMono-Regular", "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
}

body.no-motion *,
body.no-motion *::before,
body.no-motion *::after {
  animation-duration: 1ms !important;
  transition-duration: 1ms !important;
}

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

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 10;
  transform: translateY(-120%);
  background: var(--ink);
  color: var(--signal-ink);
  padding: 12px 16px;
  border-radius: var(--radius);
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.site-header {
  min-height: 64px;
  padding: 12px clamp(16px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  background: var(--canvas);
}

.brand-mark {
  width: 40px;
  height: 40px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 14px;
}

.brand-copy {
  display: grid;
  gap: 0;
}

.brand-copy strong,
.brand-copy span {
  display: block;
}

.brand-copy strong {
  font-size: 14px;
  font-weight: 700;
}

.brand-copy span,
.header-link {
  color: var(--muted);
  font-size: 14px;
}

.header-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 10px 14px;
  text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.header-link:hover {
  border-color: var(--ink);
  background: var(--surface);
}

.header-link:active {
  transform: translateY(1px);
}

main {
  overflow: clip;
}

.section-grid,
.workbench,
.feature-section,
.limits-section,
.cta-section {
  padding: var(--section) clamp(16px, 4vw, 64px);
  border-bottom: 1px solid var(--line);
}

.hero {
  min-height: calc(100vh - 64px);
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(320px, 7fr);
  gap: clamp(24px, 6vw, 80px);
  align-items: center;
}

.product-label,
.section-kicker,
.metric-label {
  margin: 0 0 12px;
  color: var(--signal);
  font-size: 14px;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 13ch;
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.2;
}

.hero-lede,
.workbench-intro p,
.feature-copy > p,
.cta-copy p {
  max-width: 70ch;
  color: var(--muted);
}

.hero-actions,
.form-actions,
.copy-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.button {
  min-height: 44px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 12px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.button.primary {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--signal-ink);
}

.button.primary:hover {
  background: #003f9e;
  border-color: #003f9e;
}

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

.button.secondary:hover,
.button.tertiary:hover {
  background: var(--surface);
}

.button.tertiary {
  background: var(--canvas);
  border-color: var(--line-strong);
  color: var(--muted);
}

.button.small {
  padding: 10px 12px;
  font-size: 13px;
}

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

.trust-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.trust-list li,
.pill-count,
.score-label {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: 13px;
  color: var(--muted);
}

.hero-media {
  margin: 0;
  justify-self: stretch;
  align-self: stretch;
  display: grid;
  align-content: end;
  min-height: 520px;
}

.media-placeholder {
  height: 100%;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  display: grid;
  place-items: end start;
  min-height: inherit;
  padding: clamp(20px, 4vw, 40px);
  background:
    linear-gradient(90deg, rgba(0, 82, 204, 0.18) 1px, transparent 1px),
    linear-gradient(0deg, rgba(0, 82, 204, 0.14) 1px, transparent 1px),
    linear-gradient(135deg, #ffffff 0%, #f2f6ff 52%, #e8eef8 100%);
  background-size: 48px 48px, 48px 48px, auto;
  color: var(--ink);
}

.media-placeholder span {
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--canvas);
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.control-pattern {
  background:
    linear-gradient(90deg, transparent 0 18%, rgba(0, 82, 204, 0.22) 18% 20%, transparent 20% 100%),
    linear-gradient(0deg, transparent 0 30%, rgba(176, 0, 32, 0.18) 30% 32%, transparent 32% 100%),
    linear-gradient(135deg, #ffffff 0%, #f7f9fc 100%);
  background-size: 120px 100%, 100% 96px, auto;
}

.hero-media figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.problem-strip {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr 1.1fr;
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.problem-strip > div {
  padding: 24px clamp(16px, 4vw, 48px);
  border-right: 1px solid var(--line);
}

.problem-strip > div:last-child {
  border-right: 0;
}

.problem-strip strong {
  display: block;
  font-size: 22px;
  line-height: 1.2;
}

.workbench {
  background: var(--canvas);
}

.workbench-intro {
  max-width: 880px;
  margin-bottom: 32px;
}

.workspace-layout {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(320px, 5fr);
  align-items: start;
  gap: var(--gap);
}

.input-panel,
.result-panel,
.finding-region,
.limit-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--canvas);
}

.input-panel,
.result-panel,
.finding-region {
  padding: clamp(16px, 3vw, 28px);
}

.field-group {
  display: grid;
  gap: 8px;
}

.large-field {
  margin-bottom: 20px;
}

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

label {
  font-size: 14px;
  font-weight: 700;
}

.input-meta,
.field-help,
.copy-status {
  color: var(--muted);
  font-size: 13px;
}

.copy-helper-hidden {
  position: fixed;
  left: -9999px;
  top: 0;
  width: 1px;
  height: 1px;
}

textarea,
input {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--canvas);
  color: var(--ink);
  padding: 12px;
  transition: border-color 160ms ease, background-color 160ms ease;
}

textarea {
  min-height: max(280px, 42vh);
  resize: vertical;
  font-family: var(--mono);
  line-height: 1.55;
}

textarea:hover,
input:hover {
  border-color: var(--ink);
}

textarea:focus,
input:focus {
  border-color: var(--ink);
  background: #fbfdff;
}

.context-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.full-span {
  grid-column: 1 / -1;
}

.form-actions {
  margin-top: 24px;
}

.error-message {
  margin: 0;
  color: var(--critical);
  font-weight: 700;
}

.result-panel {
  position: sticky;
  top: 16px;
}

.result-empty h2 {
  font-size: 32px;
}

.mini-steps {
  margin: 20px 0 0;
  padding-left: 20px;
}

.mini-steps li + li {
  margin-top: 8px;
}

.score-card {
  display: grid;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 24px;
  margin-bottom: 20px;
}

#scoreValue {
  font-family: var(--mono);
  font-size: clamp(56px, 8vw, 92px);
  line-height: 0.95;
  text-align: right;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.summary-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  display: grid;
  gap: 4px;
}

.summary-item span {
  color: var(--muted);
  font-size: 12px;
}

.summary-item strong {
  font-family: var(--mono);
  font-size: 22px;
  text-align: right;
}

.confidence-row {
  min-height: 44px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.finding-region {
  margin-top: 24px;
}

.section-heading-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: start;
  margin-bottom: 20px;
}

.finding-list {
  display: grid;
  gap: 12px;
}

.finding-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  display: grid;
  gap: 12px;
  animation: result-in 260ms ease both;
}

.finding-card.critical {
  border-color: var(--critical);
}

.finding-card.warning {
  border-color: var(--warning);
}

.finding-topline {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: start;
}

.finding-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.severity-badge {
  min-width: 72px;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  padding: 4px 8px;
  font-size: 12px;
  text-align: center;
}

.severity-badge.critical {
  color: var(--critical);
}

.severity-badge.warning {
  color: var(--warning);
}

.finding-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.evidence-box,
.template-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: var(--surface);
}

.evidence-box strong,
.template-box strong {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
}

.evidence-box p,
.template-box p {
  margin: 0;
}

.template-box p {
  font-size: 14px;
}

.feature-section {
  display: grid;
  grid-template-columns: minmax(320px, 4fr) minmax(0, 6fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
}

.feature-media {
  min-height: 360px;
  align-self: stretch;
}

.feature-lines {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.feature-lines article {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.feature-lines p {
  margin-bottom: 0;
  color: var(--muted);
}

.limits-section {
  display: grid;
  grid-template-columns: minmax(240px, 4fr) minmax(0, 8fr);
  gap: var(--gap);
}

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

.limit-card {
  padding: 24px;
}

.limit-card ul {
  margin: 0;
  padding-left: 20px;
}

.limit-card li + li {
  margin-top: 8px;
}

.cta-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--gap);
  align-items: center;
}

.site-footer {
  padding: 24px clamp(16px, 4vw, 48px);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 13px;
}

.reveal-block {
  animation: enter-up 420ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.reveal-block:nth-child(2) {
  animation-delay: 90ms;
}

.reveal-block:nth-child(3) {
  animation-delay: 140ms;
}

@keyframes enter-up {
  from {
    opacity: 0.001;
    transform: translateY(16px);
    clip-path: inset(0 0 12% 0);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    clip-path: inset(0 0 0 0);
  }
}

@keyframes result-in {
  from {
    opacity: 0.001;
    transform: translateX(12px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (max-width: 1040px) {
  .hero,
  .workspace-layout,
  .feature-section,
  .limits-section,
  .cta-section {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 16ch;
  }

  .hero-media {
    min-height: 360px;
  }

  .result-panel {
    position: static;
  }
}

@media (max-width: 760px) {
  :root {
    --section: 48px;
    --gap: 16px;
  }

  .site-header {
    grid-template-columns: auto 1fr;
  }

  .header-link {
    grid-column: 1 / -1;
    justify-content: center;
  }

  .problem-strip,
  .context-grid,
  .summary-grid,
  .limits-grid {
    grid-template-columns: 1fr;
  }

  .problem-strip > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .problem-strip > div:last-child {
    border-bottom: 0;
  }

  .section-heading-row,
  .finding-topline,
  .site-footer {
    display: grid;
  }

  textarea {
    min-height: 280px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}