:root {
  --primary: #06b6d4;
  --primary-hover: #0891b2;
  --primary-dark: #0e7490;
  --primary-light: #ecfeff;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --white: #ffffff;
  --emerald-500: #10b981;
  --emerald-50: #ecfdf5;
  --amber-500: #f59e0b;
  --amber-50: #fffbeb;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

/* TOP TRUST BAR */
.top-trust-bar {
  background: var(--slate-900);
  color: #67e8f9;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  text-align: center;
  letter-spacing: 0.01em;
  border-bottom: 1px solid rgba(103, 232, 249, 0.2);
}

/* HEADER */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--slate-200);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 2.25rem;
  height: 2.25rem;
  color: var(--primary);
  background: var(--slate-900);
  padding: 0.375rem;
  border-radius: 0.625rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--slate-900);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--primary-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.main-nav a {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--slate-600);
  transition: color 0.15s ease;
}

.main-nav a:hover, .main-nav a.active {
  color: var(--primary-hover);
}

.btn-primary-sm {
  background: var(--slate-900);
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
  transition: all 0.2s ease;
}

.btn-primary-sm:hover {
  background: var(--primary-hover);
  color: var(--white);
}

/* HERO SECTION */
.hero-section {
  background: linear-gradient(135deg, #090e17 0%, #0f172a 50%, #083344 100%);
  color: var(--white);
  padding: 4.5rem 1.5rem 5rem;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  background: rgba(6, 182, 212, 0.15);
  color: #67e8f9;
  border: 1px solid rgba(6, 182, 212, 0.35);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 820px;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.1875rem;
  color: var(--slate-300);
  max-width: 680px;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-hero-primary {
  background: var(--primary);
  color: var(--slate-900);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.875rem 1.75rem;
  border-radius: 0.75rem;
  transition: all 0.2s;
}

.btn-hero-primary:hover {
  background: #22d3ee;
  transform: translateY(-1px);
}

.btn-hero-outline {
  border: 1px solid var(--slate-600);
  color: var(--white);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.875rem 1.75rem;
  border-radius: 0.75rem;
  transition: all 0.2s;
}

.btn-hero-outline:hover {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.05);
}

/* SECTION COMMONS */
.section-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-badge {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--primary-dark);
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.125rem;
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--slate-600);
  max-width: 700px;
  margin-top: 0.5rem;
}

/* DESTINATION & COMPARISON GRID (AIRALO vs SAILY vs YESIM) */
.dest-block {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: 1.25rem;
  padding: 2rem;
  margin-bottom: 3rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.04);
}

.dest-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--slate-200);
  flex-wrap: wrap;
  gap: 1rem;
}

.dest-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.dest-flag {
  font-size: 2rem;
}

.dest-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--slate-900);
}

.dest-network-pill {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--emerald-500);
  background: var(--emerald-50);
  border: 1px solid rgba(16, 185, 129, 0.2);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
}

.comparison-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.provider-card {
  border: 2px solid var(--slate-200);
  border-radius: 1rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--white);
  transition: transform 0.2s, border-color 0.2s;
}

.provider-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.provider-card.featured {
  border-color: var(--primary);
  background: linear-gradient(180deg, var(--white) 0%, var(--primary-light) 100%);
}

.badge-featured {
  position: absolute;
  top: -12px;
  right: 16px;
  background: var(--primary-dark);
  color: var(--white);
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  letter-spacing: 0.04em;
}

.provider-brand {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.provider-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--slate-900);
}

.promo-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  color: #b45309;
  background: var(--amber-50);
  border: 1px solid #fde68a;
  padding: 0.2rem 0.5rem;
  border-radius: 0.375rem;
}

.card-carrier {
  font-size: 0.8125rem;
  color: var(--slate-600);
  font-weight: 500;
  margin-bottom: 1rem;
}

.card-pricing {
  margin-bottom: 1.25rem;
  padding: 0.75rem 0;
  border-top: 1px dashed var(--slate-200);
  border-bottom: 1px dashed var(--slate-200);
}

.card-price-main {
  display: flex;
  align-items: baseline;
  gap: 0.375rem;
}

.price-amount {
  font-size: 2rem;
  font-weight: 800;
  color: var(--slate-900);
}

.price-period {
  font-size: 0.875rem;
  color: var(--slate-500);
}

.price-per-gb-badge {
  display: inline-block;
  margin-top: 0.375rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 0.15rem 0.5rem;
  border-radius: 0.25rem;
}

.card-specs {
  list-style: none;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--slate-700);
}

.card-specs li {
  margin-bottom: 0.375rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-cta-btn {
  margin-top: auto;
  display: block;
  text-align: center;
  background: var(--slate-900);
  color: var(--white);
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 0.75rem 1rem;
  border-radius: 0.625rem;
  transition: all 0.2s;
}

.card-cta-btn:hover {
  background: var(--primary);
  color: var(--slate-900);
}

/* DATA CALCULATOR COMPONENT */
.calculator-box {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: 1.25rem;
  padding: 2.5rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.calc-field label {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--slate-800);
  margin-bottom: 0.5rem;
}

.calc-field select, .calc-field input[type="range"], .calc-field input[type="number"] {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--slate-300);
  border-radius: 0.5rem;
  font-family: inherit;
  font-size: 0.9375rem;
}

.calc-result-panel {
  background: linear-gradient(135deg, var(--slate-900) 0%, var(--slate-800) 100%);
  color: var(--white);
  border-radius: 1rem;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.calc-estimate-label {
  font-size: 0.875rem;
  color: var(--slate-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.calc-estimate-number {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  margin: 0.5rem 0;
}

.calc-recommendation-text {
  font-size: 0.9375rem;
  color: var(--slate-300);
  margin-bottom: 1.5rem;
}

.btn-calc-cta {
  background: var(--primary);
  color: var(--slate-900);
  font-weight: 800;
  padding: 0.875rem 1.5rem;
  border-radius: 0.625rem;
  transition: all 0.2s;
  display: inline-block;
}

.btn-calc-cta:hover {
  background: #22d3ee;
  transform: translateY(-1px);
}

/* DEVICE COMPATIBILITY CHECK */
.device-check-box {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: 1.25rem;
  padding: 2rem;
}

.device-search-input {
  width: 100%;
  max-width: 600px;
  padding: 0.875rem 1.25rem;
  border: 2px solid var(--slate-200);
  border-radius: 0.75rem;
  font-size: 1rem;
  font-family: inherit;
  margin-bottom: 1.5rem;
  outline: none;
  transition: border-color 0.2s;
}

.device-search-input:focus {
  border-color: var(--primary);
}

.device-list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.75rem;
}

.device-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 1rem;
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: 0.625rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-800);
}

.device-icon-check {
  color: var(--emerald-500);
  font-weight: 800;
}

/* COMPLETE YOUR TRIP ESSENTIALS (UPSELLS) */
.essentials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.essential-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: 1.25rem;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}

.essential-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px -6px rgba(0, 0, 0, 0.08);
}

.essential-icon-wrapper {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 0.875rem;
  background: var(--primary-light);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.essential-icon-wrapper svg {
  width: 1.75rem;
  height: 1.75rem;
}

.essential-partner {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--primary-dark);
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.essential-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.essential-desc {
  font-size: 0.9375rem;
  color: var(--slate-600);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.btn-essential {
  margin-top: auto;
  text-align: center;
  background: var(--slate-900);
  color: var(--white);
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 0.75rem 1.25rem;
  border-radius: 0.625rem;
  transition: all 0.2s;
}

.btn-essential:hover {
  background: var(--primary);
  color: var(--slate-900);
}

/* GUIDES & ARTICLE STYLING */
.article-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.article-header {
  margin-bottom: 2.5rem;
}

.article-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--slate-500);
  margin-bottom: 1.25rem;
}

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

.article-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--slate-900);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.875rem;
  color: var(--slate-500);
  border-bottom: 1px solid var(--slate-200);
  padding-bottom: 1.25rem;
}

.article-content {
  color: var(--slate-700);
  font-size: 1.0625rem;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 1.625rem;
  font-weight: 800;
  color: var(--slate-900);
  margin: 2.5rem 0 1rem;
  line-height: 1.3;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--slate-800);
  margin: 1.75rem 0 0.75rem;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

/* ARTICLE COMPARISON TABLE */
.table-responsive {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: 0.875rem;
  border: 1px solid var(--slate-200);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  font-size: 0.9375rem;
  text-align: left;
}

.comparison-table th {
  background: var(--slate-900);
  color: var(--white);
  padding: 0.875rem 1rem;
  font-weight: 700;
}

.comparison-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--slate-200);
}

.comparison-table tr:hover td {
  background: var(--slate-50);
}

.table-btn {
  display: inline-block;
  padding: 0.375rem 0.75rem;
  background: var(--slate-900);
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: 0.375rem;
  text-align: center;
}

.table-btn:hover {
  background: var(--primary);
  color: var(--slate-900);
}

/* EMBEDDED CTA BOX IN GUIDES */
.guide-cta-box {
  background: linear-gradient(135deg, #090e17 0%, #0f172a 100%);
  color: var(--white);
  border-radius: 1rem;
  padding: 2rem;
  margin: 2.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border: 1px solid var(--slate-700);
}

.guide-cta-title {
  font-size: 1.375rem;
  font-weight: 800;
  color: #67e8f9;
}

/* FAQ ACCORDION / CARDS */
.faq-section {
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 2px solid var(--slate-200);
}

.faq-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}

.faq-q {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 0.5rem;
}

.faq-a {
  font-size: 0.9375rem;
  color: var(--slate-600);
  line-height: 1.6;
}

/* FOOTER */
.site-footer {
  background: #020617;
  color: var(--slate-400);
  border-top: 1px solid var(--slate-800);
  margin-top: 5rem;
  font-size: 0.875rem;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 2.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-desc {
  color: var(--slate-400);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.footer-contact a {
  color: var(--primary);
  font-weight: 600;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.625rem;
}

.footer-col a {
  color: var(--slate-400);
  transition: color 0.15s;
}

.footer-col a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid var(--slate-800);
  padding-top: 2rem;
}

.disclosure-box {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--slate-800);
  border-radius: 0.75rem;
  padding: 1.25rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--slate-400);
  margin-bottom: 1.5rem;
}

.copyright-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--slate-500);
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .comparison-columns, .essentials-grid {
    grid-template-columns: 1fr;
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.25rem;
  }
  .main-nav {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}