/* ==========================================================================
   SEOSonar — Design System
   Light, professional palette: whites, soft blues, slate text.
   ========================================================================== */

:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-accent: #0ea5e9;
  --color-success: #16a34a;
  --color-success-bg: #f0fdf4;
  --color-warning: #d97706;
  --color-warning-bg: #fffbeb;
  --color-danger: #dc2626;
  --color-danger-bg: #fef2f2;

  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;

  --color-bg: #ffffff;
  --color-bg-soft: #f8fafc;
  --color-bg-blue: #f4f8ff;
  --color-border: #e2e8f0;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(30, 41, 59, 0.08);
  --shadow-lg: 0 20px 45px rgba(30, 41, 59, 0.12);

  --font-heading: 'Sora', 'Inter', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --container-width: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.5em;
  color: #0f172a;
}

p { margin: 0 0 1em; color: var(--color-text-muted); }
a { color: var(--color-primary); text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.28);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(37, 99, 235, 0.35); }
.btn-secondary {
  background: var(--color-bg-soft);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: #eef2f7; }
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary-light); }
.btn-lg { padding: 15px 30px; font-size: 1rem; }
.btn-sm { padding: 9px 16px; font-size: 0.875rem; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
}
.brand { display: flex; align-items: center; gap: 8px; }
.brand-mark { color: var(--color-primary); display: flex; }
.brand-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  color: #0f172a;
}
.brand-accent { color: var(--color-primary); }
.main-nav { display: flex; gap: 28px; }
.main-nav a { color: var(--color-text); font-weight: 500; font-size: 0.95rem; }
.main-nav a:hover { color: var(--color-primary); }

.nav-toggle {
  display: none; flex-direction: column; gap: 4px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; }
.mobile-nav {
  display: none; flex-direction: column;
  background: #fff; border-top: 1px solid var(--color-border);
  padding: 8px 24px 16px;
}
.mobile-nav a { padding: 10px 0; color: var(--color-text); border-bottom: 1px solid var(--color-border); }
.mobile-nav.open { display: flex; }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(180deg, var(--color-bg-blue) 0%, #ffffff 100%);
  padding: 72px 0 56px;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 2.9rem);
  margin-bottom: 18px;
  color: #0f172a;
}
.hero-sub { font-size: 1.1rem; margin-bottom: 28px; max-width: 540px; }

.checker-form {
  display: flex;
  gap: 12px;
  background: #fff;
  padding: 8px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  max-width: 560px;
}
.checker-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
}
.input-icon { color: var(--color-text-light); flex-shrink: 0; }
#urlInput {
  flex: 1;
  border: none;
  outline: none;
  font-size: 1rem;
  font-family: var(--font-body);
  padding: 12px 0;
  background: transparent;
  color: var(--color-text);
}
.hero-note { font-size: 0.85rem; color: var(--color-text-light); margin-top: 14px; }

.hero-visual { display: flex; justify-content: center; }
.score-card-preview {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  padding: 28px;
  width: 100%;
  max-width: 340px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}
.gauge-preview { position: relative; display: flex; align-items: center; justify-content: center; }
.gauge-preview-score {
  position: absolute; font-family: var(--font-heading); font-weight: 800;
  font-size: 2.1rem; color: #0f172a;
}
.preview-checklist { width: 100%; display: flex; flex-direction: column; gap: 10px; }
.preview-checklist li {
  font-size: 0.88rem; font-weight: 500; padding: 8px 12px;
  border-radius: 8px; display: flex; align-items: center; gap: 8px;
}
.preview-checklist li::before { content: ''; width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.preview-checklist li.pass { background: var(--color-success-bg); color: #166534; }
.preview-checklist li.pass::before { background: var(--color-success); }
.preview-checklist li.warning { background: var(--color-warning-bg); color: #92400e; }
.preview-checklist li.warning::before { background: var(--color-warning); }
.preview-checklist li.fail { background: var(--color-danger-bg); color: #991b1b; }
.preview-checklist li.fail::before { background: var(--color-danger); }

/* ===== Results Section ===== */
.results-section { padding: 56px 0; background: var(--color-bg-soft); }
.card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  margin-bottom: 24px;
}

.loading-state, .error-state {
  text-align: center;
  padding: 60px 20px;
  max-width: 480px;
  margin: 0 auto;
}
.spinner-lg {
  width: 52px; height: 52px; margin: 0 auto 20px;
  border: 5px solid var(--color-primary-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
.error-icon { font-size: 2.5rem; margin-bottom: 12px; }
.error-state h3 { color: var(--color-danger); }

.report-summary-top {
  display: flex; align-items: center; gap: 32px; flex-wrap: wrap;
  padding-bottom: 24px; border-bottom: 1px solid var(--color-border); margin-bottom: 24px;
}
.gauge-wrap { position: relative; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.gauge-score {
  position: absolute; font-family: var(--font-heading); font-weight: 800; font-size: 2.4rem; color: #0f172a;
}
#gaugeArc { transition: stroke-dasharray 1s ease, stroke 0.4s ease; }
.report-summary-info { flex: 1; min-width: 240px; }
.grade-badge {
  display: inline-block; padding: 4px 12px; border-radius: 20px;
  font-weight: 700; font-size: 0.8rem; margin-bottom: 10px;
  background: var(--color-primary-light); color: var(--color-primary-dark);
}
.report-summary-info h2 { font-size: 1.4rem; word-break: break-all; margin-bottom: 4px; }
#reportMeta { font-size: 0.88rem; margin-bottom: 14px; }
.summary-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.category-bars { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 18px; }
.category-bar-item { }
.category-bar-label {
  display: flex; justify-content: space-between; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px;
}
.category-bar-track { height: 8px; background: var(--color-bg-soft); border-radius: 6px; overflow: hidden; }
.category-bar-fill { height: 100%; border-radius: 6px; transition: width 0.8s ease; }

.checks-tabs { display: flex; gap: 6px; margin-bottom: 20px; flex-wrap: wrap; border-bottom: 1px solid var(--color-border); padding-bottom: 16px; }
.tab-btn {
  border: 1px solid var(--color-border); background: #fff; color: var(--color-text-muted);
  padding: 8px 16px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; cursor: pointer;
}
.tab-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.checks-list { display: flex; flex-direction: column; gap: 12px; }
.check-item {
  display: flex; gap: 14px; padding: 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border); background: var(--color-bg-soft);
}
.check-status-icon {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 700; color: #fff;
  margin-top: 2px;
}
.check-item.pass .check-status-icon { background: var(--color-success); }
.check-item.warning .check-status-icon { background: var(--color-warning); }
.check-item.fail .check-status-icon { background: var(--color-danger); }
.check-body h4 { font-size: 1rem; margin-bottom: 4px; }
.check-body .check-message { font-size: 0.9rem; margin-bottom: 0; }
.check-recommendation {
  margin-top: 8px; font-size: 0.85rem; padding: 10px 12px; border-radius: 8px;
  background: var(--color-primary-light); color: #1e3a8a; display: flex; gap: 8px;
}
.check-recommendation strong { color: var(--color-primary-dark); }

/* ===== How it works ===== */
.how-it-works, .features, .faq { padding: 72px 0; }
.section-title { text-align: center; font-size: clamp(1.6rem, 3vw, 2.1rem); margin-bottom: 8px; }
.section-sub { text-align: center; max-width: 560px; margin: 0 auto 44px; }

.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.step-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 30px; text-align: center; box-shadow: var(--shadow-sm);
}
.step-num {
  width: 44px; height: 44px; border-radius: 50%; background: var(--color-primary-light);
  color: var(--color-primary-dark); font-weight: 800; font-family: var(--font-heading);
  display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.1rem;
}
.step-card h3 { font-size: 1.15rem; }

.features { background: var(--color-bg-soft); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border-radius: var(--radius-md); padding: 26px;
  border: 1px solid var(--color-border);
}
.feature-icon { font-size: 1.8rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1.05rem; }
.feature-card p { font-size: 0.92rem; margin: 0; }

.ad-section { padding: 8px 0 40px; }

.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  padding: 4px 20px;
}
.faq-item summary { padding: 16px 0; font-weight: 600; cursor: pointer; list-style: none; position: relative; }
.faq-item summary::after { content: '+'; position: absolute; right: 0; top: 14px; font-size: 1.3rem; color: var(--color-primary); }
.faq-item[open] summary::after { content: '−'; }
.faq-item p { padding-bottom: 16px; margin: 0; }

.cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  padding: 64px 0; text-align: center; color: #fff;
}
.cta h2 { color: #fff; font-size: clamp(1.5rem, 3vw, 2rem); }
.cta p { color: rgba(255,255,255,0.9); margin-bottom: 24px; }
.cta .btn-primary { background: #fff; color: var(--color-primary-dark); box-shadow: 0 8px 20px rgba(0,0,0,0.15); }
.cta .btn-primary:hover { background: #f5f8ff; }

/* ===== Footer ===== */
.site-footer { background: #0f172a; color: #cbd5e1; padding: 56px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.3fr 2fr; gap: 40px; padding-bottom: 40px; }
.footer-brand p { color: #94a3b8; font-size: 0.9rem; max-width: 320px; }
.footer-brand .brand-name { color: #fff; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-col h4 { color: #fff; font-size: 0.9rem; margin-bottom: 14px; }
.footer-col a { display: block; color: #94a3b8; font-size: 0.9rem; padding: 6px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; text-align: center; }
.footer-bottom p { color: #64748b; font-size: 0.85rem; margin: 0; }

/* ===== Ad slot ===== */
.ad-slot {
  background: #fff; border: 1px dashed var(--color-border); border-radius: var(--radius-sm);
  padding: 16px; text-align: center; min-height: 90px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
}
.ad-slot-label { font-size: 0.7rem; color: var(--color-text-light); text-transform: uppercase; letter-spacing: 0.05em; }

/* ===== Static content pages ===== */
.page-content { padding: 60px 0 80px; max-width: 780px; margin: 0 auto; }
.page-content h1 { font-size: 2rem; margin-bottom: 8px; }
.page-content .updated { color: var(--color-text-light); font-size: 0.85rem; margin-bottom: 32px; }
.page-content h2 { font-size: 1.3rem; margin-top: 36px; }
.page-content ul { list-style: disc; padding-left: 22px; margin-bottom: 16px; }
.page-content li { color: var(--color-text-muted); margin-bottom: 6px; }
.contact-form { display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.contact-form input, .contact-form textarea {
  padding: 12px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.95rem;
}
.contact-form label { font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; display: block; }
.form-success, .form-error { padding: 14px; border-radius: var(--radius-sm); margin-top: 16px; }
.form-success { background: var(--color-success-bg); color: #166534; }
.form-error { background: var(--color-danger-bg); color: #991b1b; }

.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 32px; }
.blog-card {
  border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 24px; background: #fff;
}
.blog-card h3 { font-size: 1.1rem; }
.blog-card .tag {
  display: inline-block; background: var(--color-primary-light); color: var(--color-primary-dark);
  font-size: 0.75rem; font-weight: 600; padding: 3px 10px; border-radius: 12px; margin-bottom: 10px;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .steps-grid, .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .checker-form { flex-direction: column; }
  .checker-input-wrap { padding: 8px 10px; }
  .steps-grid, .features-grid { grid-template-columns: 1fr; }
  .report-summary-top { flex-direction: column; text-align: center; }
  .summary-actions { justify-content: center; }
}

/* Print styles for "Print / Save Report" */
@media print {
  .site-header, .site-footer, .ad-slot, .cta, .how-it-works, .features, .faq, .hero, #ctaScrollBtn, .summary-actions { display: none !important; }
  body { background: #fff; }
}