:root {
  /* Color system - professional blue/white business palette */
  --primary-50: #eef4fb;
  --primary-100: #d6e6f7;
  --primary-200: #b0cdec;
  --primary-300: #7facdf;
  --primary-400: #4a8fd0;
  --primary-500: #2a72c0;
  --primary-600: #1d5aa3;
  --primary-700: #184a87;
  --primary-800: #163c6e;
  --primary-900: #143259;

  --accent-50: #eafaf2;
  --accent-100: #cdf2dd;
  --accent-200: #9ee5bd;
  --accent-300: #66d397;
  --accent-400: #38c073;
  --accent-500: #1fa85c;
  --accent-600: #158a49;
  --accent-700: #116b3a;

  --warning-50: #fff8e8;
  --warning-100: #ffecbf;
  --warning-500: #f0a500;
  --warning-700: #b07a00;

  --error-50: #fdeeee;
  --error-500: #d32f2f;
  --error-700: #9a1c1c;

  --neutral-0: #ffffff;
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;

  --font-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --container-max: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--neutral-800);
  background: var(--neutral-50);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--neutral-900);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.9rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); }
h4 { font-size: 1.1rem; }

p { line-height: 1.7; }

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover { color: var(--primary-800); }

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

ul, ol { padding-left: 1.3rem; }
li { margin-bottom: 0.4rem; line-height: 1.7; }

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

.section {
  padding: 64px 0;
}
.section-sm { padding: 40px 0; }

.section-title {
  text-align: center;
  margin-bottom: 12px;
}
.section-subtitle {
  text-align: center;
  color: var(--neutral-500);
  max-width: 640px;
  margin: 0 auto 48px;
  font-size: 1.05rem;
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--neutral-200);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--primary-700);
  letter-spacing: -0.02em;
}
.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
}
.logo-text { line-height: 1; }
.logo-text small {
  display: block;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--neutral-400);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  padding: 0;
}
.nav-menu a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--neutral-700);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}
.nav-menu a:hover {
  background: var(--primary-50);
  color: var(--primary-700);
}
.nav-menu a.active {
  background: var(--primary-600);
  color: #fff;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--neutral-800);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--neutral-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu a { padding: 12px 16px; }
}

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 72px 0 64px;
  background:
    linear-gradient(135deg, rgba(20, 50, 89, 0.93), rgba(29, 90, 163, 0.88)),
    var(--primary-700);
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(74, 143, 208, 0.25), transparent 65%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -8%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(31, 168, 92, 0.18), transparent 65%);
  border-radius: 50%;
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; }
.hero h1 { color: #fff; margin-bottom: 18px; }
.hero p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 28px;
  max-width: 620px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.97rem;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent-500);
  color: #fff;
  box-shadow: 0 4px 14px rgba(31, 168, 92, 0.35);
}
.btn-primary:hover {
  background: var(--accent-600);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(31, 168, 92, 0.45);
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--primary-600);
  border: 1.5px solid var(--primary-300);
}
.btn-outline:hover {
  background: var(--primary-50);
  color: var(--primary-800);
}

/* ============ Rating badge ============ */
.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 8px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
  backdrop-filter: blur(4px);
}
.stars { display: inline-flex; gap: 2px; color: var(--warning-500); }
.rating-badge .score { font-weight: 700; color: #fff; }
.rating-badge .label { color: rgba(255, 255, 255, 0.8); font-size: 0.88rem; }

/* ============ Cards grid ============ */
.grid {
  display: grid;
  gap: 28px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ============ Article card ============ */
.card {
  background: #fff;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
}
.card-image {
  position: relative;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--primary-100), var(--primary-300));
  overflow: hidden;
}
.card-image img { width: 100%; height: 100%; object-fit: cover; }
.card-image .tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--primary-600);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.card-meta {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--neutral-400);
  margin-bottom: 10px;
}
.card-body h3 { margin-bottom: 8px; font-size: 1.15rem; }
.card-body h3 a { color: var(--neutral-900); }
.card-body h3 a:hover { color: var(--primary-700); }
.card-body p { color: var(--neutral-600); font-size: 0.95rem; margin-bottom: 16px; flex: 1; }
.card-link {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--primary-600);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}
.card-link:hover { gap: 10px; color: var(--primary-800); }

/* ============ Layout with sidebar ============ */
.layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}

.sidebar { position: sticky; top: calc(var(--header-height) + 24px); display: flex; flex-direction: column; gap: 24px; }
.widget {
  background: #fff;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.widget h4 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-100);
}
.widget ul { list-style: none; padding: 0; }
.widget li { margin-bottom: 12px; }
.widget li a { color: var(--neutral-700); font-size: 0.92rem; font-weight: 500; display: block; padding: 6px 0; }
.widget li a:hover { color: var(--primary-600); }

.deal-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--neutral-100);
}
.deal-item:last-child { border-bottom: none; }
.deal-code {
  background: var(--accent-50);
  color: var(--accent-700);
  font-weight: 700;
  font-size: 0.82rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--accent-300);
}

/* = trust badge widget = */
.trust-box { text-align: center; }
.trust-box .big-score {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-700);
  line-height: 1;
}
.trust-box .big-score small { font-size: 1rem; color: var(--neutral-400); font-weight: 600; }
.trust-box .stars { justify-content: center; font-size: 1.2rem; margin: 8px 0; }

/* ============ Article / long-form ============ */
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }
@media (max-width: 900px) { .article-layout { grid-template-columns: 1fr; } }

.article-hero {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-500));
  color: #fff;
  padding: 56px 0 48px;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}
.article-hero .container { max-width: 820px; }
.article-hero h1 { color: #fff; margin-bottom: 14px; }
.article-meta { display: flex; gap: 16px; align-items: center; color: rgba(255,255,255,0.85); font-size: 0.9rem; flex-wrap: wrap; }
.article-meta .author { display: flex; align-items: center; gap: 8px; }
.article-meta .avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem;
}

.article-body {
  max-width: 760px;
  font-size: 1.05rem;
  color: var(--neutral-700);
}
.article-body h2 {
  margin: 40px 0 14px;
  padding-top: 8px;
  border-top: 2px solid var(--neutral-100);
}
.article-body h3 { margin: 28px 0 10px; color: var(--primary-800); }
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol { margin-bottom: 18px; }
.article-body blockquote {
  border-left: 4px solid var(--primary-400);
  background: var(--primary-50);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--neutral-700);
}
.article-body img {
  border-radius: var(--radius-md);
  margin: 24px 0;
  box-shadow: var(--shadow-md);
}
.article-body .image-caption {
  text-align: center;
  font-size: 0.85rem;
  color: var(--neutral-400);
  margin-top: -16px;
  margin-bottom: 24px;
}
.article-body .callout {
  background: var(--warning-50);
  border: 1px solid var(--warning-100);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin: 24px 0;
}
.article-body .callout strong { color: var(--warning-700); }

.article-toc {
  background: var(--neutral-50);
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 32px;
}
.article-toc h4 { margin-bottom: 10px; font-size: 0.95rem; color: var(--neutral-600); }
.article-toc ol { padding-left: 1.2rem; }
.article-toc li { margin-bottom: 6px; font-size: 0.92rem; }

/* ============ CTA banner ============ */
.cta-banner {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-500));
  border-radius: var(--radius-xl);
  padding: 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-banner h2 { color: #fff; margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.9); margin-bottom: 24px; max-width: 520px; margin-left: auto; margin-right: auto; }

/* ============ Table ============ */
.table-wrap { overflow-x: auto; margin: 24px 0; border-radius: var(--radius-md); border: 1px solid var(--neutral-200); }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th { background: var(--primary-50); text-align: left; padding: 14px 16px; font-weight: 700; color: var(--primary-800); border-bottom: 2px solid var(--primary-100); }
td { padding: 14px 16px; border-bottom: 1px solid var(--neutral-100); color: var(--neutral-700); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--neutral-50); }

/* ============ Footer ============ */
.site-footer {
  background: var(--neutral-900);
  color: var(--neutral-300);
  padding: 56px 0 24px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand .logo { color: #fff; margin-bottom: 14px; }
.footer-brand p { color: var(--neutral-400); font-size: 0.92rem; max-width: 320px; }
.footer-col h5 { color: #fff; font-size: 0.95rem; margin-bottom: 14px; font-weight: 700; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--neutral-400); font-size: 0.9rem; }
.footer-col a:hover { color: var(--primary-300); }

.disclaimer-box {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
  font-size: 0.85rem;
  color: var(--neutral-400);
  line-height: 1.6;
}
.disclaimer-box strong { color: var(--neutral-200); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--neutral-500);
}
.footer-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-nav a { color: var(--neutral-400); }
.footer-nav a:hover { color: var(--primary-300); }

/* ============ Forms ============ */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--neutral-700);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--neutral-300);
  border-radius: var(--radius-md);
  font-size: 0.97rem;
  font-family: inherit;
  transition: all 0.2s ease;
  background: #fff;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(74, 143, 208, 0.15);
}
textarea.form-control { min-height: 140px; resize: vertical; }

/* ============ Misc ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge-primary { background: var(--primary-100); color: var(--primary-700); }
.badge-accent { background: var(--accent-100); color: var(--accent-700); }
.badge-warning { background: var(--warning-100); color: var(--warning-700); }

.page-hero {
  background: linear-gradient(135deg, var(--primary-800), var(--primary-600));
  color: #fff;
  padding: 56px 0;
  text-align: center;
}
.page-hero h1 { color: #fff; margin-bottom: 10px; }
.page-hero p { color: rgba(255,255,255,0.88); max-width: 600px; margin: 0 auto; }

.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--neutral-400);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--neutral-500); }
.breadcrumb a:hover { color: var(--primary-600); }
.breadcrumb span { color: var(--neutral-300); }

.lead { font-size: 1.15rem; color: var(--neutral-600); margin-bottom: 24px; }

.feature-list { list-style: none; padding: 0; }
.feature-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px solid var(--neutral-100);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list .check {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--accent-100);
  color: var(--accent-700);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.8rem;
}

.stat-row { display: flex; gap: 40px; flex-wrap: wrap; margin: 32px 0; }
.stat { text-align: center; }
.stat .num { font-size: 2.2rem; font-weight: 800; color: var(--primary-700); line-height: 1; }
.stat .lbl { font-size: 0.85rem; color: var(--neutral-500); margin-top: 4px; }

.affiliate-note {
  font-size: 0.8rem;
  color: var(--neutral-400);
  font-style: italic;
  margin-top: 8px;
}

.fade-in { animation: fadeIn 0.6s ease both; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}