/* n8n Workflow Complexity Analyzer — Impeccable Design System */
/* Zero-decoration minimalism: no gradients, no shadows, no decorative icons */

:root {
  --canvas: #ffffff;
  --ink: #000000;
  --signal: #0052cc;
  --signal-dark: #003d99;
  --signal-light: #e5f0ff;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-300: #d4d4d4;
  --gray-400: #a3a3a3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --gray-800: #262626;
  --red: #dc2626;
  --red-light: #fef2f2;
  --amber: #d97706;
  --amber-light: #fffbeb;
  --green: #16a34a;
  --green-light: #f0fdf4;
  --radius: 4px;
  --max-width: 768px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: "Pretendard", "Pretendard Variable", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--canvas);
  color: var(--ink);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  border-bottom: 1px solid var(--gray-200);
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: var(--canvas);
  z-index: 100;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  text-decoration: none;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.logo strong {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-sub {
  font-size: 0.75rem;
  color: var(--gray-500);
  font-weight: 400;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header-nav a {
  text-decoration: none;
  color: var(--gray-700);
  font-size: 0.875rem;
  font-weight: 500;
}

.header-nav a:hover {
  color: var(--ink);
}

.btn-contact {
  background: var(--ink);
  color: var(--canvas) !important;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-weight: 700 !important;
}

.btn-contact:hover {
  background: var(--gray-800);
}

/* ===== Hero ===== */
.hero {
  padding: 64px 0 32px;
  text-align: center;
}

.eyebrow {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--signal);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 1.0625rem;
  color: var(--gray-600);
  max-width: 480px;
  margin: 0 auto 20px;
}

.trust-note {
  font-size: 0.875rem;
  color: var(--gray-500);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.trust-star {
  color: var(--signal);
  font-size: 1rem;
}

/* ===== Input ===== */
.input-section {
  padding: 24px 0 64px;
}

.input-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 0.15s;
}

.input-card.drag-active {
  border-color: var(--signal);
  background: var(--signal-light);
}

.input-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.input-header h2 {
  font-size: 1.125rem;
  font-weight: 700;
}

.btn-sample {
  background: none;
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}

.btn-sample:hover {
  border-color: var(--gray-400);
  color: var(--ink);
}

textarea#jsonInput {
  width: 100%;
  min-height: 240px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 16px;
  font-family: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
  font-size: 0.8125rem;
  line-height: 1.6;
  resize: vertical;
  background: var(--gray-50);
  color: var(--ink);
  transition: border-color 0.15s, background 0.15s;
}

textarea#jsonInput:focus {
  outline: none;
  border-color: var(--signal);
  background: var(--canvas);
}

textarea#jsonInput::placeholder {
  color: var(--gray-400);
}

.input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
}

.btn-upload {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  color: var(--gray-700);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}

.btn-upload:hover {
  background: var(--gray-200);
}

.btn-analyze {
  background: var(--signal);
  color: var(--canvas);
  border: none;
  padding: 11px 32px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}

.btn-analyze:hover:not(:disabled) {
  background: var(--signal-dark);
}

.btn-analyze:disabled {
  background: var(--gray-300);
  cursor: not-allowed;
}

.input-hint {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 12px;
}

.input-hint.error {
  color: var(--red);
}

/* ===== Results ===== */
.results-section {
  padding: 0 0 64px;
}

/* Score Card */
.score-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 32px;
}

.score-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.score-label {
  font-size: 0.875rem;
  color: var(--gray-500);
  font-weight: 500;
  margin-bottom: 4px;
}

.score-value {
  font-size: 3rem;
  font-weight: 700;
  font-family: "JetBrains Mono", monospace;
  letter-spacing: -0.02em;
  line-height: 1;
}

.score-grade {
  width: 56px;
  height: 56px;
  border: 2px solid var(--gray-300);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  font-family: "JetBrains Mono", monospace;
}

.score-grade.grade-a { border-color: var(--green); color: var(--green); }
.score-grade.grade-b { border-color: var(--green); color: var(--green); }
.score-grade.grade-c { border-color: var(--amber); color: var(--amber); }
.score-grade.grade-d { border-color: var(--red); color: var(--red); }
.score-grade.grade-f { border-color: var(--red); color: var(--red); background: var(--red-light); }

.score-bar {
  height: 8px;
  background: var(--gray-100);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 16px;
}

.score-bar-fill {
  height: 100%;
  width: 0;
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--signal);
}

.score-bar-fill.bar-a { background: var(--green); }
.score-bar-fill.bar-b { background: var(--green); }
.score-bar-fill.bar-c { background: var(--amber); }
.score-bar-fill.bar-d { background: var(--red); }
.score-bar-fill.bar-f { background: var(--red); }

.score-desc {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.metric-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 20px;
}

.metric-item.metric-warn {
  border-color: var(--amber);
  background: var(--amber-light);
}

.metric-item.metric-danger {
  border-color: var(--red);
  background: var(--red-light);
}

.metric-label {
  font-size: 0.8125rem;
  color: var(--gray-500);
  font-weight: 500;
  margin-bottom: 8px;
}

.metric-value {
  font-size: 1.75rem;
  font-weight: 700;
  font-family: "JetBrains Mono", monospace;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.metric-unit {
  font-size: 0.875rem;
  color: var(--gray-500);
  font-weight: 400;
}

.metric-note {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 4px;
}

/* Findings */
.findings-section {
  margin-bottom: 32px;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.finding-item {
  display: flex;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 8px;
}

.finding-item.severity-high {
  border-color: var(--red);
}

.finding-item.severity-medium {
  border-color: var(--amber);
}

.finding-badge {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius);
  height: fit-content;
}

.finding-badge.severity-high {
  background: var(--red);
  color: var(--canvas);
}

.finding-badge.severity-medium {
  background: var(--amber);
  color: var(--canvas);
}

.finding-badge.severity-low {
  background: var(--gray-200);
  color: var(--gray-700);
}

.finding-content {
  flex: 1;
}

.finding-title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.finding-desc {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.5;
}

.suggestion-item {
  display: flex;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 8px;
}

.suggestion-number {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: 1px solid var(--signal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--signal);
  font-family: "JetBrains Mono", monospace;
}

.suggestion-content {
  flex: 1;
}

.suggestion-title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.suggestion-desc {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.5;
}

/* CTA Card */
.cta-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  background: var(--gray-50);
  margin-bottom: 24px;
}

.cta-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.cta-card p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  margin-bottom: 20px;
  line-height: 1.6;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--signal);
  color: var(--canvas);
  text-decoration: none;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 700;
  display: inline-block;
}

.btn-primary:hover {
  background: var(--signal-dark);
}

.btn-secondary {
  background: var(--canvas);
  color: var(--ink);
  border: 1px solid var(--gray-300);
  text-decoration: none;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 700;
  display: inline-block;
}

.btn-secondary:hover {
  border-color: var(--gray-400);
}

/* Reanalyze */
.reanalyze {
  text-align: center;
}

.btn-reanalyze {
  background: none;
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}

.btn-reanalyze:hover {
  border-color: var(--gray-400);
  color: var(--ink);
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--gray-200);
  padding: 40px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.footer-brand strong {
  font-size: 1.125rem;
  font-weight: 700;
}

.footer-brand span {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

.footer-nav {
  display: flex;
  gap: 24px;
}

.footer-nav a {
  text-decoration: none;
  color: var(--gray-600);
  font-size: 0.875rem;
}

.footer-nav a:hover {
  color: var(--ink);
}

.footer-info {
  font-size: 0.8125rem;
  color: var(--gray-400);
  line-height: 1.7;
}

.footer-info p {
  margin: 0;
}

.copyright {
  margin-top: 8px !important;
}

/* ===== Trust Bar ===== */
.trust-bar {
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
  padding: 24px 0;
  background: var(--gray-50);
}

.trust-items {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 24px;
}

.trust-item {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.trust-item strong {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.trust-item span {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* ===== Comparison Section ===== */
.comparison-section {
  padding: 48px 0;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.comparison-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
}

.comparison-before {
  background: var(--gray-50);
}

.comparison-after {
  border-color: var(--signal);
  background: var(--signal-light);
}

.comparison-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gray-400);
  margin-bottom: 8px;
}

.comparison-after .comparison-label {
  color: var(--signal);
}

.comparison-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.comparison-card ul {
  list-style: none;
  padding: 0;
}

.comparison-card li {
  font-size: 0.875rem;
  color: var(--gray-600);
  padding: 6px 0;
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}

.comparison-before li::before {
  content: "\2014";
  position: absolute;
  left: 0;
  color: var(--gray-400);
}

.comparison-after li::before {
  content: "+";
  position: absolute;
  left: 0;
  color: var(--signal);
  font-weight: 700;
}

/* ===== Health/Flow/Value Summary ===== */
.hfv-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.hfv-pill {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.hfv-pill-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gray-500);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.hfv-pill-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: "JetBrains Mono", monospace;
  line-height: 1.2;
}

.hfv-pill-bar {
  height: 4px;
  background: var(--gray-100);
  border-radius: 2px;
  margin-top: 8px;
  overflow: hidden;
}

.hfv-pill-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.5s ease;
}

.hfv-pill.good .hfv-pill-bar-fill { background: var(--green); }
.hfv-pill.warn .hfv-pill-bar-fill { background: var(--amber); }
.hfv-pill.danger .hfv-pill-bar-fill { background: var(--red); }

/* ===== Onboarding Steps (CTA) ===== */
.onboarding-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-200);
  flex-wrap: wrap;
}

.onboarding-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  text-align: left;
}

.step-number {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: 1px solid var(--signal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--signal);
  font-family: "JetBrains Mono", monospace;
}

.onboarding-step strong {
  font-size: 0.875rem;
  font-weight: 700;
  display: block;
}

.step-price {
  font-size: 0.75rem;
  color: var(--signal);
  font-weight: 500;
  margin-left: 6px;
}

.onboarding-step p {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 2px;
  max-width: 140px;
}

.onboarding-arrow {
  color: var(--gray-300);
  font-size: 1.25rem;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 64px 0;
  border-top: 1px solid var(--gray-200);
}

.faq-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
}

.faq-item {
  border-bottom: 1px solid var(--gray-200);
}

.faq-item summary {
  padding: 20px 0;
  font-size: 0.9375rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--gray-400);
  font-weight: 400;
  transition: transform 0.15s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 0 20px 0;
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ===== Hero CTA ===== */
.hero-cta {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: center;
  margin-top: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.btn-hero-link {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid var(--signal);
  padding-bottom: 2px;
}

.btn-hero-link:hover {
  color: var(--signal-dark);
  border-bottom-color: var(--signal-dark);
}

/* ===== Comparison Card Link ===== */
.card-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--signal);
  text-decoration: none;
}

.card-link:hover {
  color: var(--signal-dark);
}

/* ===== Inline CTA ===== */
.inline-cta {
  text-align: center;
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-top: 16px;
}

.inline-cta a {
  color: var(--signal);
  text-decoration: none;
  font-weight: 700;
}

.inline-cta a:hover {
  color: var(--signal-dark);
}

/* ===== Final CTA Banner ===== */
.final-cta {
  padding: 64px 0;
  text-align: center;
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
}

.final-cta h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.final-cta p {
  font-size: 1rem;
  color: var(--gray-600);
  margin-bottom: 24px;
}

.final-cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== FAQ inline links ===== */
.faq-item p a {
  color: var(--signal);
  text-decoration: none;
  font-weight: 700;
}

.faq-item p a:hover {
  color: var(--signal-dark);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.875rem;
  }

  .trust-items {
    flex-direction: column;
    gap: 12px;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .hfv-summary {
    grid-template-columns: 1fr;
  }

  .onboarding-steps {
    flex-direction: column;
  }

  .onboarding-arrow {
    transform: rotate(90deg);
  }

  .input-card {
    padding: 20px;
  }

  .input-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .input-footer {
    flex-direction: column;
    gap: 12px;
  }

  .input-footer > * {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .score-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .score-value {
    font-size: 2.5rem;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .footer-top {
    flex-direction: column;
  }
}