/* Commercial SEO Compare — theme */

:root {
  --csa-bg: #0b1020;
  --csa-surface: #141b33;
  --csa-card: #1a2342;
  --csa-text: #f1f5f9;
  --csa-muted: #94a3b8;
  --csa-primary: #6366f1;
  --csa-primary-glow: rgba(99, 102, 241, 0.45);
  --csa-accent: #f97316;
  --csa-accent-glow: rgba(249, 115, 22, 0.45);
  --csa-magenta: #ec4899;
  --csa-cyan: #22d3ee;
  --csa-green: #22c55e;
  --csa-yellow: #facc15;
  --csa-red: #ef4444;
  --csa-radius: 18px;
  --csa-max: 1120px;
  --csa-font: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

body {
  margin: 0;
  font-family: var(--csa-font);
  color: var(--csa-text);
  background: var(--csa-bg);
  line-height: 1.6;
}

.csa-landing {
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #312e81 0%, var(--csa-bg) 55%);
  padding-bottom: 0;
}

/* Site header / footer */
.csa-site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(11, 16, 32, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.csa-site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  flex-wrap: wrap;
}

.csa-site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--csa-text);
  text-decoration: none;
}

.csa-site-logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--csa-cyan), var(--csa-magenta));
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.csa-site-nav {
  display: none;
  gap: 1.25rem;
}

.csa-site-nav a {
  color: var(--csa-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
}

.csa-site-nav a:hover {
  color: var(--csa-cyan);
}

@media (min-width: 768px) {
  .csa-site-nav {
    display: flex;
  }
}

.csa-btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.csa-site-footer {
  background: #070a14;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 2rem 0;
}

.csa-site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
}

.csa-site-footer__brand {
  display: block;
  margin-bottom: 0.35rem;
}

.csa-site-footer p {
  margin: 0;
  color: var(--csa-muted);
  font-size: 0.9rem;
}

.csa-site-footer__muted {
  font-size: 0.82rem !important;
  opacity: 0.75;
}

.csa-landing *,
.csa-landing *::before,
.csa-landing *::after {
  box-sizing: border-box;
}

.csa-container {
  width: min(100% - 2rem, var(--csa-max));
  margin-inline: auto;
}

/* DNA animation background */
.csa-dna-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.35;
}

.csa-dna-strand {
  position: absolute;
  top: -10%;
  width: 120px;
  height: 120%;
  background: repeating-linear-gradient(
    180deg,
    var(--csa-cyan) 0 8px,
    transparent 8px 24px,
    var(--csa-magenta) 24px 32px,
    transparent 32px 48px
  );
  border-radius: 50%;
  filter: blur(1px);
  animation: csa-dna-float 14s ease-in-out infinite;
}

.csa-dna-strand--a {
  left: 8%;
  transform: rotate(15deg);
  animation-delay: 0s;
}

.csa-dna-strand--b {
  right: 12%;
  transform: rotate(-12deg);
  animation-delay: -7s;
  background: repeating-linear-gradient(
    180deg,
    var(--csa-accent) 0 8px,
    transparent 8px 24px,
    var(--csa-primary) 24px 32px,
    transparent 32px 48px
  );
}

.csa-dna-bg::before,
.csa-dna-bg::after {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  border: 3px dashed rgba(34, 211, 238, 0.25);
  animation: csa-dna-spin 20s linear infinite;
}

.csa-dna-bg::before {
  top: 15%;
  left: 20%;
}

.csa-dna-bg::after {
  bottom: 10%;
  right: 18%;
  border-color: rgba(236, 72, 153, 0.25);
  animation-direction: reverse;
}

@keyframes csa-dna-float {
  0%, 100% { transform: translateY(0) rotate(15deg); }
  50% { transform: translateY(40px) rotate(18deg); }
}

@keyframes csa-dna-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Hero */
.csa-hero {
  position: relative;
  padding: 4rem 0 3rem;
  text-align: center;
}

.csa-badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.25), rgba(236, 72, 153, 0.25));
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 1.25rem;
}

.csa-hero__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  background: linear-gradient(135deg, #fff 30%, var(--csa-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.csa-hero__lead {
  max-width: 680px;
  margin: 0 auto 1.75rem;
  color: var(--csa-muted);
  font-size: 1.05rem;
}

.csa-hero__cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Buttons */
.csa-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.csa-btn:hover {
  transform: translateY(-2px);
}

.csa-btn--lg {
  padding: 0.95rem 1.85rem;
  font-size: 1.05rem;
}

.csa-btn--full {
  width: 100%;
}

.csa-btn--primary {
  background: linear-gradient(135deg, var(--csa-primary), #818cf8);
  color: #fff;
  box-shadow: 0 10px 30px var(--csa-primary-glow);
}

.csa-btn--accent {
  background: linear-gradient(135deg, var(--csa-accent), #fb923c);
  color: #fff;
  box-shadow: 0 10px 30px var(--csa-accent-glow);
  border: none;
}

.csa-btn--ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--csa-text);
  border-color: rgba(255, 255, 255, 0.2);
}

.csa-pulse {
  animation: csa-pulse 2.5s ease-in-out infinite;
}

@keyframes csa-pulse {
  0%, 100% { box-shadow: 0 10px 30px var(--csa-primary-glow); }
  50% { box-shadow: 0 10px 40px var(--csa-accent-glow), 0 0 0 6px rgba(249, 115, 22, 0.15); }
}

/* Form */
.csa-form-section {
  position: relative;
  padding: 1rem 0 3rem;
}

.csa-form-card {
  background: linear-gradient(145deg, var(--csa-card), var(--csa-surface));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--csa-radius);
  padding: 2rem;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.csa-form-card h2 {
  margin: 0 0 1.25rem;
  font-size: 1.35rem;
}

.csa-field {
  display: block;
  margin-bottom: 1.25rem;
}

.csa-field__label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.csa-field__hint {
  display: block;
  font-size: 0.85rem;
  color: var(--csa-muted);
  margin-bottom: 0.4rem;
}

.csa-field input,
.csa-field textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 2px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.25);
  color: var(--csa-text);
  font: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.csa-field input:focus,
.csa-field textarea:focus {
  outline: none;
  border-color: var(--csa-cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.2);
}

.csa-loading {
  text-align: center;
  padding: 2rem 0 0;
  color: var(--csa-muted);
}

.csa-spinner {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  border: 4px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--csa-cyan);
  border-radius: 50%;
  animation: csa-spin 0.8s linear infinite;
}

@keyframes csa-spin {
  to { transform: rotate(360deg); }
}

/* Results */
.csa-results {
  position: relative;
  padding: 2rem 0 3rem;
}

.csa-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.csa-score-card {
  background: var(--csa-card);
  border-radius: var(--csa-radius);
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.csa-score-card--client {
  border-color: var(--csa-cyan);
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.15);
}

.csa-score-card__value {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  margin: 0.5rem 0;
}

.csa-score-card__value--good { color: var(--csa-green); }
.csa-score-card__value--mid { color: var(--csa-yellow); }
.csa-score-card__value--bad { color: var(--csa-red); }

.csa-summary-text {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.15), rgba(236, 72, 153, 0.15));
  border-left: 4px solid var(--csa-accent);
  padding: 1rem 1.25rem;
  border-radius: 0 12px 12px 0;
  margin-bottom: 2rem;
  grid-column: 1 / -1;
}

.csa-table-wrap h2 {
  margin-bottom: 1rem;
}

.csa-table-scroll {
  overflow-x: auto;
  border-radius: var(--csa-radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.csa-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  font-size: 0.9rem;
}

.csa-table th,
.csa-table td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  text-align: left;
  vertical-align: top;
}

.csa-table th {
  background: rgba(0, 0, 0, 0.3);
  font-weight: 800;
  white-space: nowrap;
}

.csa-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

.csa-status {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.csa-status--pass {
  background: rgba(34, 197, 94, 0.2);
  color: #86efac;
}

.csa-status--partial {
  background: rgba(250, 204, 21, 0.2);
  color: #fde047;
}

.csa-status--fail {
  background: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
}

.csa-gap--pos { color: var(--csa-green); font-weight: 700; }
.csa-gap--neg { color: var(--csa-red); font-weight: 700; }

/* Recommendations */
.csa-recommendations {
  margin-top: 2rem;
}

.csa-recommendations h2 {
  margin-bottom: 1rem;
}

.csa-rec-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.csa-rec-item {
  background: var(--csa-card);
  border-radius: 14px;
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--csa-muted);
}

.csa-rec-item--critical { border-left-color: var(--csa-red); }
.csa-rec-item--important { border-left-color: var(--csa-accent); }
.csa-rec-item--nice { border-left-color: var(--csa-cyan); }

.csa-rec-item h4 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.csa-rec-item p {
  margin: 0;
  color: var(--csa-muted);
  font-size: 0.92rem;
}

/* Education */
.csa-edu,
.csa-factors-list {
  position: relative;
  padding: 3rem 0;
}

.csa-section-title {
  text-align: center;
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 0.75rem;
}

.csa-section-lead {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2rem;
  color: var(--csa-muted);
}

.csa-edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.csa-edu-card {
  background: var(--csa-card);
  border-radius: var(--csa-radius);
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.2s, box-shadow 0.2s;
}

.csa-edu-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

.csa-edu-card--relevance { border-top: 3px solid var(--csa-cyan); }
.csa-edu-card--pricing { border-top: 3px solid var(--csa-yellow); }
.csa-edu-card--cta { border-top: 3px solid var(--csa-accent); }
.csa-edu-card--trust { border-top: 3px solid var(--csa-green); }
.csa-edu-card--structure { border-top: 3px solid var(--csa-primary); }
.csa-edu-card--technical { border-top: 3px solid var(--csa-magenta); }

.csa-edu-card__icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.csa-edu-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.csa-edu-card p {
  margin: 0;
  color: var(--csa-muted);
  font-size: 0.92rem;
}

.csa-factor-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.csa-factor-mini {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 14px;
  padding: 1rem 1.15rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.csa-factor-mini h4 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--csa-cyan);
}

.csa-factor-mini p {
  margin: 0 0 0.35rem;
  font-size: 0.85rem;
  color: var(--csa-muted);
}

.csa-factor-mini__impact {
  color: #cbd5e1 !important;
}

/* Bottom CTA */
.csa-cta-bottom {
  position: relative;
  padding: 3rem 0 4rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(249, 115, 22, 0.15));
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.csa-cta-bottom__inner {
  text-align: center;
}

.csa-cta-bottom h2 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
}

.csa-cta-bottom p {
  color: var(--csa-muted);
  margin: 0 0 1.5rem;
}

@media (max-width: 640px) {
  .csa-form-card {
    padding: 1.25rem;
  }

  .csa-hero {
    padding-top: 2.5rem;
  }
}