/* ========================================
   GBWaps - Design System
   ======================================== */

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

:root {
  --whatsapp-green: #25D366;
  --dark-green: #075E54;
  --deep-green: #128C7E;
  --dark: #1F1F1F;
  --light-bg: #F5F5F5;
  --white: #FFFFFF;
  --gray-text: #6B7280;
  --border-color: #e5e7eb;
  --warning-bg: #FFF8E1;
  --warning-border: #F59E0B;
  --danger: #EF4444;
  --success: #10B981;
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --section-gap: 48px;
  --container-padding: 24px;
  --card-padding: 24px;
  --container-max: 1200px;
  --content-max: 800px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--dark);
  background: var(--light-bg);
  line-height: 1.6;
  min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--dark-green);
  margin-bottom: 16px;
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
  font-weight: 600;
  margin-top: var(--section-gap);
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

p {
  margin-bottom: 16px;
  line-height: 1.8;
}

a {
  color: var(--deep-green);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--dark-green);
}

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

.content-narrow {
  /* max-width: var(--content-max); */
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.btn-primary {
  display: inline-block;
  background: var(--whatsapp-green);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  padding: 16px 32px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 18px;
  cursor: pointer;
  transition: all 0.3s;
  text-align: center;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  color: var(--white);
}

.btn-secondary {
  display: inline-block;
  background: var(--white);
  color: var(--dark-green);
  border: 2px solid var(--dark-green);
  border-radius: var(--radius-md);
  padding: 14px 28px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-secondary:hover {
  background: var(--dark-green);
  color: var(--white);
}

.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  padding: var(--card-padding);
  margin-bottom: 24px;
}

.warning-box {
  border-left: 4px solid var(--warning-border);
  background: var(--warning-bg);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}

th,
td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid #eee;
}

th {
  font-family: var(--font-heading);
  font-weight: 600;
  background: var(--light-bg);
}

.comparison-table thead th {
  background: var(--light-bg);
  color: var(--dark-green);
  border-bottom: 2px solid var(--dark-green);
}

.comparison-table th,
.comparison-table td {
  border: 1px solid var(--border-color);
}

.comparison-table tbody td {
  color: var(--dark);
  background: var(--white);
}

.accordion-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.accordion-header {
  background: var(--white);
  padding: 16px 20px;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.3s;
}

.accordion-header:hover {
  background: var(--light-bg);
}

.accordion-header::after {
  content: '+';
  font-size: 24px;
  font-weight: 300;
  color: var(--dark-green);
  transition: transform 0.3s;
}

.accordion-item.active .accordion-header::after {
  transform: rotate(45deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  background: var(--white);
}

.accordion-content-inner {
  padding: 20px;
}

.step-card {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--dark-green);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
}

.step-content {
  flex: 1;
}

.step-content h3 {
  margin-top: 0;
}

.sticky-download {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--whatsapp-green);
  color: var(--white);
  text-align: center;
  padding: 16px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  display: none;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
}

.sticky-download a {
  color: var(--white);
  text-decoration: underline;
}

.gbwaps-app {
  padding-bottom: 0;
}

@media (max-width: 768px) {
  .sticky-download {
    display: block;
  }

  .gbwaps-app {
    padding-bottom: 80px;
  }
}

.site-header {
  background: var(--white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px var(--container-padding);
  position: relative;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.site-brand:hover {
  opacity: 0.92;
}

.site-brand-logo {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 10px;
}

.site-brand-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.15;
}

.site-brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--dark-green);
  letter-spacing: -0.02em;
}

.site-brand-muted {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--gray-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
}

.main-nav a,
.main-nav .router-link-active {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--dark);
  transition: color 0.3s;
}

.main-nav a:hover,
.main-nav .router-link-active {
  color: var(--whatsapp-green);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--dark-green);
}

@media (max-width: 768px) {
  .site-brand-name {
    font-size: 1rem;
  }

  .site-brand-muted {
    display: none;
  }

  .main-nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .main-nav.active {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }

  .main-nav.active ul {
    flex-direction: column;
    gap: 16px;
  }
}

.site-footer {
  background: var(--dark-green);
  color: var(--white);
  padding: 48px 0 24px;
  margin-top: var(--section-gap);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
  margin-bottom: 24px;
}

.footer-links a {
  color: var(--white);
  opacity: 0.9;
  transition: opacity 0.3s;
}

.footer-links a:hover {
  opacity: 1;
}

.site-footer .disclaimer {
  text-align: center;
  font-size: 14px;
  opacity: 0.8;
  margin-bottom: 8px;
}

.site-footer .copyright {
  text-align: center;
  font-size: 14px;
  opacity: 0.6;
  margin-bottom: 0;
}

.page-hero {
  background: var(--white);
  padding: 32px 0 24px;
}

.page-intro {
  color: var(--gray-text);
  font-size: 1.125rem;
}

.breadcrumb {
  margin-bottom: 16px;
  font-size: 14px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: 8px;
  color: var(--gray-text);
}

.page-content {
  padding: 24px 0 48px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 24px 0;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  text-align: center;
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--light-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 28px;
}

.article-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s;
}

.article-card:hover {
  transform: translateY(-4px);
}

.article-card-content {
  padding: 24px;
}

.article-meta {
  font-size: 14px;
  color: var(--gray-text);
  margin-bottom: 8px;
}

.version-table {
  width: 100%;
  margin: 24px 0;
}

.version-table thead {
  background: #f9fafb;
}

.version-table th,
.version-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-color);
}

.text-center {
  text-align: center;
}

.text-green {
  color: var(--whatsapp-green);
}

.text-danger {
  color: var(--danger);
}

.mt-16 {
  margin-top: 16px;
}

.mt-24 {
  margin-top: 24px;
}

.mb-16 {
  margin-bottom: 16px;
}

.mb-24 {
  margin-bottom: 24px;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .btn-primary {
    padding: 14px 24px;
    font-size: 16px;
  }
}