:root {
  --canvas: #ffffff;
  --ink: #080b10;
  --muted: #4a5566;
  --line: #d8dde6;
  --surface: #f7f9fc;
  --surface-strong: #eef3f9;
  --accent: #0052cc;
  --accent-dark: #003b91;
  --danger: #b42318;
  --warning: #a15c00;
  --success: #087443;
  --code: #101828;
  --focus: #7aa7ff;
  --radius-sm: 4px;
  --radius-md: 8px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --shadow-line: 0 0 0 1px rgba(8, 11, 16, 0.08);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

button,
input,
a {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:visited {
  color: #4d21a8;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 10;
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 18px clamp(16px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand,
.site-header nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.brand {
  color: var(--ink);
  font-weight: 700;
}

.brand:visited {
  color: var(--ink);
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: #fff;
  background: var(--ink);
  border-radius: var(--radius-sm);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.site-header nav a {
  color: var(--ink);
  font-size: 14px;
}

.nav-cta {
  padding: 9px 12px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-sm);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: var(--space-16) clamp(16px, 5vw, 72px);
}

.hero {
  min-height: calc(100vh - 72px);
  overflow: hidden;
}

.label {
  margin: 0 0 var(--space-3);
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

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

h1 {
  max-width: 12ch;
  margin-bottom: var(--space-6);
  font-size: clamp(44px, 7vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

h2 {
  max-width: 18ch;
  margin-bottom: var(--space-4);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h3 {
  margin-bottom: var(--space-2);
  font-size: 18px;
  line-height: 1.25;
}

.lead,
.checker-intro p,
.feature-copy p {
  max-width: 68ch;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions,
.button-row,
.export-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.primary-action,
.secondary-action,
.secondary-button,
.consulting-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  text-decoration: none;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.primary-action {
  border: 1px solid var(--accent);
  color: #fff;
  background: var(--accent);
}

.primary-action:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-1px);
}

.secondary-action,
.secondary-button,
.consulting-link {
  border: 1px solid var(--line);
  color: var(--ink);
  background: #fff;
}

.secondary-action:hover,
.secondary-button:hover,
.consulting-link:hover {
  border-color: var(--ink);
  transform: translateY(-1px);
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  max-width: 560px;
  margin: var(--space-8) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.signal-strip div {
  padding: var(--space-4);
  border-right: 1px solid var(--line);
}

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

.signal-strip dt {
  color: var(--muted);
  font-size: 13px;
}

.signal-strip dd {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 24px;
  font-weight: 700;
  text-align: right;
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.photo-panel {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface);
}

.photo-panel-main {
  transform: translateX(8%) rotate(2deg);
  animation: slow-float 8s ease-in-out infinite;
}

.photo-panel img {
  display: block;
  width: 100%;
  height: 520px;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.08);
}

.photo-panel figcaption {
  position: absolute;
  right: 10px;
  bottom: 8px;
  padding: 4px 7px;
  color: #fff;
  background: rgba(8, 11, 16, 0.75);
  border-radius: var(--radius-sm);
  font-size: 12px;
}

.scan-card {
  position: absolute;
  left: -10%;
  bottom: 38px;
  width: min(420px, 86%);
  padding: var(--space-4);
  color: #f8fafc;
  background: var(--code);
  border-radius: var(--radius-sm);
  border: 1px solid #263247;
  overflow: hidden;
  animation: card-enter 700ms ease both;
}

.scan-head {
  display: flex;
  gap: 6px;
  margin-bottom: var(--space-3);
}

.scan-head span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #cad5e3;
}

.scan-card pre {
  margin: 0;
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}

.scan-line {
  position: absolute;
  inset: 0;
  height: 36%;
  background: rgba(122, 167, 255, 0.16);
  border-top: 1px solid rgba(122, 167, 255, 0.45);
  border-bottom: 1px solid rgba(122, 167, 255, 0.45);
  animation: scanner 3s ease-in-out infinite;
}

.trust-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.trust-bar p {
  margin: 0;
  padding: var(--space-4) clamp(12px, 3vw, 32px);
  border-right: 1px solid var(--line);
  font-weight: 700;
  text-align: center;
}

.trust-bar p:last-child {
  border-right: 0;
}

.checker-shell,
.results-section,
.rules-section {
  padding: var(--space-16) clamp(16px, 5vw, 72px);
}

.checker-intro {
  margin-bottom: var(--space-8);
}

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: var(--space-6);
  align-items: start;
}

.upload-panel,
.progress-panel,
.score-panel,
.findings-panel,
.rule-stack article {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}

.upload-panel,
.progress-panel,
.score-panel,
.findings-panel {
  padding: var(--space-6);
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.panel-heading h3 {
  margin: 0;
}

.status-pill,
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: var(--surface);
  font-size: 12px;
  font-weight: 700;
}

.status-pill.active {
  color: var(--accent-dark);
  border-color: #8cb7ff;
  background: #edf5ff;
}

.status-pill.done,
.badge.low {
  color: var(--success);
  border-color: #8fd3b0;
  background: #eefbf4;
}

.badge.medium {
  color: var(--warning);
  border-color: #f1c27b;
  background: #fff7e8;
}

.badge.high {
  color: var(--danger);
  border-color: #f1a39e;
  background: #fff1f0;
}

.drop-zone {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-8);
  border: 1px dashed var(--accent);
  border-radius: var(--radius-sm);
  background: var(--surface);
  transition: background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.drop-zone:hover,
.drop-zone.dragging {
  background: #edf5ff;
  border-color: var(--accent-dark);
  transform: translateY(-1px);
}

.drop-title {
  font-size: 22px;
  font-weight: 700;
}

.drop-copy,
.help-text,
.file-list,
.step-list,
.mini-report p,
.finding-meta,
.finding-item p,
.rule-stack p {
  color: var(--muted);
}

.drop-zone input {
  width: 1px;
  height: 1px;
  opacity: 0;
  position: absolute;
  pointer-events: none;
}

.file-list {
  margin-top: var(--space-4);
  border-top: 1px solid var(--line);
  padding-top: var(--space-4);
}

.file-list ul {
  margin: 0;
  padding-left: 18px;
}

.error-box {
  margin-top: var(--space-4);
  padding: var(--space-4);
  color: var(--danger);
  border: 1px solid #f1a39e;
  border-radius: var(--radius-sm);
  background: #fff1f0;
}

.manual-copy {
  width: 100%;
  min-height: 180px;
  margin: var(--space-4) 0;
  padding: var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--code);
  background: var(--surface);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  resize: vertical;
}

.step-list {
  display: grid;
  gap: var(--space-3);
  margin: 0 0 var(--space-6);
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.step-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.step-list li::before {
  counter-increment: step;
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  color: #fff;
  background: var(--muted);
  border-radius: var(--radius-sm);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

.step-list li.active {
  color: var(--accent-dark);
  border-color: #8cb7ff;
  background: #edf5ff;
}

.step-list li.done::before {
  background: var(--success);
}

.mini-report {
  padding: var(--space-4);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
}

.mini-report strong {
  display: block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 52px;
  line-height: 1;
  text-align: right;
}

.results-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.score-panel {
  position: sticky;
  top: 96px;
}

.score-meter {
  display: flex;
  align-items: baseline;
  justify-content: flex-end;
  gap: 6px;
  margin: var(--space-8) 0 var(--space-4);
  padding: var(--space-6);
  border: 1px solid var(--ink);
  border-radius: var(--radius-sm);
  animation: pulse-border 2.8s ease-in-out infinite;
}

.score-meter span {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(58px, 10vw, 116px);
  font-weight: 700;
  line-height: 0.9;
}

.findings-panel h3 {
  margin-top: var(--space-6);
}

.findings-panel h3:first-child {
  margin-top: 0;
}

.risk-list,
.finding-list,
.rule-stack {
  display: grid;
  gap: var(--space-3);
}

.risk-card,
.finding-item {
  padding: var(--space-4);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.risk-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
}

.risk-index {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: #fff;
  background: var(--ink);
  border-radius: var(--radius-sm);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.finding-head {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: center;
}

.finding-meta {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}

.snippet {
  margin: var(--space-3) 0 0;
  padding: var(--space-3);
  color: #f8fafc;
  background: var(--code);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

.feature-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature-section .photo-panel {
  transform: translateX(-4%) rotate(-1deg);
}

.feature-copy {
  padding-left: clamp(0px, 4vw, 48px);
}

.rules-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.rule-stack {
  grid-template-columns: 1.2fr 0.9fr 1fr 0.8fr;
  align-items: stretch;
}

.rule-stack article {
  padding: var(--space-6);
}

.rule-stack article:nth-child(2) {
  margin-top: 42px;
}

.rule-stack article:nth-child(3) {
  margin-top: 18px;
}

.rule-stack article:nth-child(4) {
  margin-top: 72px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-8) clamp(16px, 5vw, 72px);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
}

.reveal {
  animation: reveal-up 520ms ease both;
}

@keyframes reveal-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slow-float {
  0%, 100% { transform: translateX(8%) rotate(2deg) translateY(0); }
  50% { transform: translateX(8%) rotate(2deg) translateY(-10px); }
}

@keyframes scanner {
  0% { transform: translateY(-100%); }
  50% { transform: translateY(180%); }
  100% { transform: translateY(-100%); }
}

@keyframes card-enter {
  from { opacity: 0; transform: translateY(22px) rotate(-2deg); }
  to { opacity: 1; transform: translateY(0) rotate(-2deg); }
}

@keyframes pulse-border {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 82, 204, 0); }
  50% { box-shadow: 0 0 0 6px rgba(0, 82, 204, 0.08); }
}

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

  .site-header nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .section-grid,
  .workbench,
  .results-layout {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 13ch;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 440px;
  }

  .photo-panel-main,
  .feature-section .photo-panel {
    transform: none;
  }

  .photo-panel img {
    height: 420px;
  }

  .score-panel {
    position: static;
  }

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

  .rule-stack article:nth-child(n) {
    margin-top: 0;
  }
}

@media (max-width: 640px) {
  .site-header,
  .site-footer {
    display: grid;
  }

  .site-header nav {
    justify-content: start;
    gap: 10px;
  }

  .section-grid,
  .checker-shell,
  .results-section,
  .rules-section {
    padding: 48px 16px;
  }

  h1 {
    max-width: 10ch;
    font-size: 44px;
  }

  .lead,
  .checker-intro p,
  .feature-copy p {
    font-size: 16px;
  }

  .signal-strip,
  .trust-bar,
  .rule-stack {
    grid-template-columns: 1fr;
  }

  .signal-strip div,
  .trust-bar p {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .signal-strip div:last-child,
  .trust-bar p:last-child {
    border-bottom: 0;
  }

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

  .photo-panel img {
    height: 320px;
  }

  .scan-card {
    left: 4%;
    bottom: 12px;
    width: 92%;
  }

  .upload-panel,
  .progress-panel,
  .score-panel,
  .findings-panel {
    padding: 16px;
  }

  .drop-zone {
    padding: 24px 16px;
  }

  .risk-card {
    grid-template-columns: 1fr;
  }

  .finding-head {
    display: grid;
  }
}

@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;
  }
}