:root {
  --color-bg: #f7fafc;
  --color-surface: #ffffff;
  --color-surface-soft: #eef4f7;
  --color-text: #11202d;
  --color-text-muted: #5c6b77;
  --color-border: #d9e3ea;
  --color-primary: #0f766e;
  --color-primary-hover: #0d665f;
  --color-secondary: #0f172a;
  --color-accent: #f59e0b;
  --color-success: #16a34a;

  --font-sans: "Plus Jakarta Sans", "Segoe UI", "Helvetica Neue", sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.8rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --radius-sm: 0.4rem;
  --radius-md: 0.7rem;
  --radius-lg: 1rem;
  --radius-xl: 1.35rem;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 20px 45px rgba(15, 23, 42, 0.1);

  --container: 1120px;
  --transition: 180ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(circle at 15% 10%, rgba(15, 118, 110, 0.08), transparent 35%),
    radial-gradient(circle at 90% 15%, rgba(245, 158, 11, 0.09), transparent 30%),
    var(--color-bg);
}

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

a:hover {
  color: var(--color-primary-hover);
}

img {
  max-width: 100%;
  display: block;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(247, 250, 252, 0.86);
  border-bottom: 1px solid rgba(17, 32, 45, 0.08);
}

.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-secondary);
  font-weight: 700;
  font-size: var(--text-lg);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #ffffff;
  background: linear-gradient(145deg, #0f766e, #164e63);
  box-shadow: var(--shadow-sm);
  font-size: 1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-link {
  color: var(--color-text-muted);
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  font-size: var(--text-sm);
  font-weight: 600;
  transition: background var(--transition), color var(--transition);
}

.nav-link:hover {
  color: var(--color-secondary);
  background: var(--color-surface-soft);
}

.nav-link.active {
  color: #ffffff;
  background: var(--color-secondary);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 0.4rem 0.65rem;
  color: var(--color-secondary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 0;
  border-radius: 999px;
  padding: 0.72rem 1.15rem;
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: var(--color-surface);
  color: var(--color-secondary);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  background: var(--color-surface-soft);
}

.main {
  padding-block: var(--space-12) var(--space-16);
}

.section {
  margin-top: var(--space-16);
}

.section-header {
  margin-bottom: var(--space-8);
}

.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-3);
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--color-secondary);
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 3.4vw, var(--text-4xl));
}

h2 {
  font-size: clamp(1.55rem, 2.6vw, var(--text-3xl));
}

h3 {
  font-size: var(--text-xl);
}

p {
  margin: 0;
  color: var(--color-text-muted);
}

.lead {
  font-size: var(--text-lg);
  max-width: 62ch;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: var(--space-10);
  align-items: center;
}

.hero-card {
  background: var(--color-surface);
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.stats {
  margin-top: var(--space-6);
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.stat strong {
  display: block;
  color: var(--color-secondary);
  font-size: var(--text-xl);
}

.grid {
  display: grid;
  gap: var(--space-5);
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid rgba(15, 23, 42, 0.07);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
}

.card h3,
.card h4 {
  margin-bottom: var(--space-3);
}

.icon {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  border-radius: 12px;
  margin-bottom: var(--space-4);
  background: var(--color-surface-soft);
  color: var(--color-primary);
  font-weight: 700;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  text-align: left;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
}

th {
  color: var(--color-secondary);
  background: #f9fcff;
}

.check {
  color: var(--color-success);
  font-weight: 700;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  margin-bottom: var(--space-3);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  padding: var(--space-4) var(--space-5);
  color: var(--color-secondary);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 220ms ease;
  padding: 0 var(--space-5);
}

.faq-item.open .faq-answer {
  max-height: 240px;
  padding-bottom: var(--space-4);
}

.ad-slot {
  margin-top: var(--space-8);
  border: 1px dashed #c7d6df;
  border-radius: var(--radius-md);
  background: #f4f9fd;
  color: #7890a1;
  min-height: 120px;
  display: grid;
  place-items: center;
  text-align: center;
  font-size: var(--text-sm);
}

.kicker {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: var(--text-sm);
}

.article-hero {
  padding: var(--space-10);
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, #ffffff, #eef4f8);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.article-meta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
}

.prose {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}

.prose p,
.prose li {
  color: #2d3d49;
}

.prose h2,
.prose h3 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.prose ul,
.prose ol {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: var(--space-2);
}

.author {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

.author-badge {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(145deg, #0f766e, #0d9488);
  color: #ffffff;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.cta-band {
  margin-top: var(--space-12);
  background: linear-gradient(140deg, #0f172a, #164e63);
  color: #dbeafe;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}

.cta-band p {
  color: #dbeafe;
}

.site-footer {
  border-top: 1px solid rgba(17, 32, 45, 0.08);
  background: #eef4f7;
}

.footer-grid {
  padding-block: var(--space-8);
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-6);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-bottom {
  border-top: 1px solid rgba(17, 32, 45, 0.1);
  padding-block: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.rating-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.rating-score {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.rating-score strong {
  font-size: 2.5rem;
  color: var(--color-secondary);
  line-height: 1;
}

.rating-stars {
  color: var(--color-accent);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  margin-top: 0.3rem;
}

.rating-meta {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.review-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.review-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.review-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(145deg, #0f766e, #0d9488);
  color: #ffffff;
  font-weight: 700;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.reviewer-info h4 {
  margin: 0;
  color: var(--color-secondary);
  font-size: var(--text-sm);
}

.review-date {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  margin: 0.2rem 0 0 0;
}

.review-text {
  color: var(--color-text);
  font-size: var(--text-sm);
  line-height: 1.5;
  margin-bottom: var(--space-3);
}

.review-helpful {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.animate-up {
  opacity: 0;
  transform: translateY(8px);
  animation: rise 500ms ease forwards;
}

.animate-up:nth-child(2) { animation-delay: 70ms; }
.animate-up:nth-child(3) { animation-delay: 140ms; }
.animate-up:nth-child(4) { animation-delay: 210ms; }

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .hero,
  .grid-3,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: 74px;
    left: 1rem;
    right: 1rem;
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
    display: none;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-links.open {
    display: flex;
  }

  .hero-card,
  .prose,
  .article-hero {
    padding: var(--space-6);
  }

  .main {
    padding-top: var(--space-8);
  }
}