/* ==========================================================================
   CLAVESBARATAS.COM - Modern High-Performance Design System
   Pure CSS - Ultra-fast, Zero-framework, Fully Responsive
   ========================================================================== */

/* --- CSS Variables & Theme Tokens --- */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, 'Courier New', monospace;

  /* Colors */
  --primary: #10b981;
  --primary-hover: #059669;
  --primary-dark: #047857;
  --primary-light: #d1fae5;
  --primary-subtle: #ecfdf5;

  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-blue-light: #eff6ff;

  --wa-green: #25d366;
  --wa-green-hover: #20ba59;
  --wa-green-dark: #128c7e;
  --wa-green-light: #dcf8c6;

  --dark-900: #0f172a;
  --dark-800: #1e293b;
  --dark-700: #334155;
  --dark-600: #475569;

  --gray-500: #64748b;
  --gray-400: #94a3b8;
  --gray-300: #cbd5e1;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;

  --danger: #ef4444;
  --danger-light: #fee2e2;
  --warning: #f59e0b;
  --warning-light: #fef3c7;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow-green: 0 0 20px rgba(16, 185, 129, 0.35);
  --shadow-glow-wa: 0 0 20px rgba(37, 211, 102, 0.4);

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Global Defaults --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--gray-50);
  color: var(--dark-800);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video, iframe {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* --- Container & Grid System --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container-narrow {
  width: 100%;
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.site-logo {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--dark-900);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  letter-spacing: -0.02em;
}

.site-logo .highlight {
  color: var(--primary);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.site-logo .badge-verified {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--primary-subtle);
  color: var(--primary-dark);
  border: 1px solid var(--primary-light);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  margin-left: 0.35rem;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link-forum {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--dark-700);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  background: var(--white);
  transition: all var(--transition-fast);
}

.nav-link-forum:hover {
  color: var(--primary-dark);
  border-color: var(--primary);
  background: var(--primary-subtle);
  transform: translateY(-1px);
}

.nav-btn-wa {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--wa-green);
  color: var(--white);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-md);
  box-shadow: 0 2px 4px rgba(37, 211, 102, 0.25);
  transition: all var(--transition-fast);
}

.nav-btn-wa:hover {
  background: var(--wa-green-hover);
  box-shadow: var(--shadow-glow-wa);
  transform: translateY(-1px);
}

/* --- Hero Section --- */
.hero-section {
  padding: 3.5rem 0 2rem;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--primary-subtle);
  color: var(--primary-dark);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--primary-light);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--dark-900);
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.5rem;
  }
}

.hero-title .gradient-text {
  display: block;
  background: linear-gradient(135deg, #059669 0%, #10b981 50%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--dark-600);
  max-width: 680px;
  margin: 1.25rem auto 0;
  line-height: 1.6;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.25rem;
  }
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
}

.hero-trust-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1.5rem 2.5rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dark-700);
}

.trust-item svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 700;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  transition: all var(--transition-normal);
  text-align: center;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover) 0%, #036246 100%);
  box-shadow: var(--shadow-glow-green);
  transform: translateY(-2px);
  color: var(--white);
}

.btn-wa {
  background: linear-gradient(135deg, var(--wa-green) 0%, var(--wa-green-dark) 100%);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.35);
}

.btn-wa:hover {
  background: linear-gradient(135deg, var(--wa-green-hover) 0%, #0d7367 100%);
  box-shadow: var(--shadow-glow-wa);
  transform: translateY(-2px);
  color: var(--white);
}

.btn-dark {
  background: var(--dark-800);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-dark:hover {
  background: var(--dark-900);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  color: var(--white);
}

.btn-outline {
  background: var(--white);
  color: var(--dark-800);
  border: 2px solid var(--gray-300);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
  background: var(--primary-subtle);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  border-radius: var(--radius-xl);
}

.btn-full {
  width: 100%;
}

/* --- Section Titles --- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark-900);
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.35rem;
  }
}

.section-subtitle {
  font-size: 1rem;
  color: var(--dark-600);
  margin-top: 0.5rem;
}

/* --- Product Cards Grid --- */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.product-card.featured {
  border: 2px solid var(--primary);
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.15);
}

.product-card.featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, #38bdf8 100%);
}

.card-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.card-badge.badge-popular {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
}

.card-badge.badge-new {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: var(--white);
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.3);
}

.card-badge.badge-eco {
  background: var(--dark-800);
  color: var(--white);
}

.product-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.product-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--dark-900);
  margin-bottom: 0.35rem;
}

.product-description {
  font-size: 0.9rem;
  color: var(--dark-600);
  margin-bottom: 1.25rem;
  min-height: 2.8rem;
}

.price-box {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--gray-200);
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.price-original {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-400);
  text-decoration: line-through;
}

.price-current {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--dark-900);
  line-height: 1;
}

.price-period {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-500);
}

.price-promo {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--danger);
  margin-top: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.feature-list {
  list-style: none;
  margin-bottom: 1.75rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.feature-item {
  font-size: 0.875rem;
  color: var(--dark-700);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.feature-item svg {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

/* --- More Products Card --- */
.more-products-box {
  margin-top: 2rem;
  background: var(--white);
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-2xl);
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-normal);
}

.more-products-box:hover {
  border-color: var(--primary);
  background: var(--primary-subtle);
}

.more-products-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark-900);
}

.more-products-sub {
  font-size: 0.9rem;
  color: var(--dark-600);
  margin-top: 0.25rem;
}

.more-products-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 1rem;
}

.product-tag {
  background: var(--gray-100);
  color: var(--dark-800);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--gray-200);
}

/* --- How to Buy Section --- */
.steps-wrapper {
  background: var(--white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
  padding: 3rem 2rem;
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  position: relative;
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  font-size: 1.5rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}

.step-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--dark-900);
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.9rem;
  color: var(--dark-600);
  line-height: 1.5;
}

.steps-cta-box {
  margin-top: 2.5rem;
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--gray-200);
}

.contact-options-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
}

.contact-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--gray-100);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dark-700);
}

.contact-chip a {
  color: var(--accent-blue);
  font-weight: 700;
}

.contact-chip a:hover {
  text-decoration: underline;
}

/* --- Advantages Grid --- */
.advantages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .advantages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.advantage-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.advantage-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.advantage-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--primary-subtle);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.advantage-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--dark-900);
  margin-bottom: 0.35rem;
}

.advantage-card p {
  font-size: 0.875rem;
  color: var(--dark-600);
  line-height: 1.55;
}

/* --- Guides & Articles Grid --- */
.guides-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 768px) {
  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.guide-link-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-xs);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: all var(--transition-fast);
}

.guide-link-card:hover {
  transform: translateX(4px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-md);
  background: var(--accent-blue-light);
}

.guide-link-content {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.guide-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-blue);
}

.guide-title {
  font-size: 0.975rem;
  font-weight: 700;
  color: var(--dark-900);
}

.guide-arrow {
  color: var(--gray-400);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.guide-link-card:hover .guide-arrow {
  color: var(--accent-blue);
  transform: translateX(4px);
}

/* --- FAQ Accordion --- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--gray-300);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark-900);
  text-align: left;
  background: var(--white);
  cursor: pointer;
}

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-500);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease-out;
  padding: 0 1.5rem;
  color: var(--dark-600);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  padding-bottom: 1.25rem;
}

/* --- Article & Guide Pages --- */
.article-wrapper {
  background: var(--white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-200);
  padding: 2rem 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .article-wrapper {
    padding: 3.5rem 3rem;
  }
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-500);
  margin-bottom: 1.5rem;
}

.breadcrumbs a {
  color: var(--dark-600);
}

.breadcrumbs a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.breadcrumbs-sep {
  color: var(--gray-400);
}

.article-header {
  text-align: center;
  margin-bottom: 2rem;
}

.article-header h1 {
  font-size: 2.25rem;
  font-weight: 900;
  line-height: 1.2;
  color: var(--dark-900);
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .article-header h1 {
    font-size: 3rem;
  }
}

.article-subtitle {
  font-size: 1.15rem;
  color: var(--dark-600);
  margin-top: 0.75rem;
}

.article-meta-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* In-Article CTA Banner */
.article-cta-box {
  background: linear-gradient(135deg, var(--primary-subtle) 0%, #e0f2fe 100%);
  border: 2px solid var(--primary-light);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  text-align: center;
  margin: 2rem 0;
}

.article-cta-box h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--dark-900);
  margin-bottom: 0.35rem;
}

.article-cta-box p {
  font-size: 0.9rem;
  color: var(--dark-700);
  margin-bottom: 1rem;
}

/* Article Typography */
.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--dark-700);
}

.article-body h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--dark-900);
  margin-top: 2.75rem;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark-900);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-body h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark-800);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.article-body p {
  margin-bottom: 1.35rem;
}

.article-body a {
  color: var(--accent-blue);
  text-decoration: underline;
  font-weight: 600;
}

.article-body a:hover {
  color: var(--accent-blue-hover);
}

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

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

.article-body strong {
  color: var(--dark-900);
  font-weight: 700;
}

/* Responsive Video Container */
.video-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--dark-900);
  margin: 1.75rem 0;
  box-shadow: var(--shadow-lg);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* Code Blocks & Copy Button */
.code-box {
  background: var(--dark-900);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--dark-700);
}

.code-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #38bdf8;
  word-break: break-all;
  user-select: all;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--dark-700);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

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

.btn-copy.copied {
  background: var(--primary);
}

/* Callout Boxes */
.callout {
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-left: 4px solid;
}

.callout-info {
  background: var(--accent-blue-light);
  border-color: var(--accent-blue);
  color: var(--dark-800);
}

.callout-warning {
  background: var(--warning-light);
  border-color: var(--warning);
  color: #78350f;
}

.callout-danger {
  background: var(--danger-light);
  border-color: var(--danger);
  color: #7f1d1d;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 1.75rem 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.custom-table th {
  background: var(--gray-100);
  color: var(--dark-900);
  font-weight: 700;
  padding: 0.85rem 1rem;
  border-bottom: 2px solid var(--gray-200);
}

.custom-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--gray-200);
}

.custom-table tr:last-child td {
  border-bottom: none;
}

.custom-table .cell-highlight-green {
  background: var(--primary-subtle);
  color: var(--primary-dark);
  font-weight: 700;
}

.custom-table .cell-highlight-red {
  background: var(--danger-light);
  color: #991b1b;
}

/* Contact List in Article */
.contact-list-box {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.contact-list-box h4 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--dark-900);
}

.contact-list-box ul {
  list-style: none;
  margin-left: 0;
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* --- Floating WhatsApp Widget --- */
.floating-wa-widget {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 999;
}

.floating-wa-btn {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  background: var(--wa-green);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  transition: all var(--transition-normal);
  position: relative;
}

.floating-wa-btn:hover {
  transform: scale(1.08);
  box-shadow: var(--shadow-glow-wa);
  background: var(--wa-green-hover);
}

.wa-pulse-dot {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 14px;
  height: 14px;
  background: #ff3b30;
  border: 2px solid var(--white);
  border-radius: var(--radius-full);
  animation: wa-pulse 2s infinite;
}

@keyframes wa-pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 59, 48, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(255, 59, 48, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 59, 48, 0); }
}

.wa-popup-menu {
  position: absolute;
  bottom: 72px;
  right: 0;
  width: 300px;
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
}

.wa-popup-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.wa-popup-header {
  background: var(--wa-green-dark);
  color: var(--white);
  padding: 1rem 1.25rem;
}

.wa-popup-title {
  font-size: 0.95rem;
  font-weight: 700;
}

.wa-popup-sub {
  font-size: 0.8rem;
  opacity: 0.9;
  margin-top: 0.2rem;
}

.wa-popup-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.wa-channel-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-fast);
}

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

.wa-channel-info {
  display: flex;
  flex-direction: column;
}

.wa-channel-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--dark-900);
}

.wa-channel-num {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* --- Banner Containers (Forum & Sponsors) --- */
.promo-banners-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1.25rem;
  margin: 2.5rem 0 1.5rem;
}

.promo-banner-link {
  display: block;
  overflow: hidden;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid var(--gray-200);
  max-height: 150px;
}

.promo-banner-link:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.promo-banner-img {
  height: 100%;
  max-height: 150px;
  width: auto;
  object-fit: contain;
  display: block;
}

/* --- Footer --- */
.site-footer {
  background: var(--dark-900);
  color: var(--white);
  margin-top: 4rem;
  padding: 3.5rem 0 2rem;
  border-top: 1px solid var(--dark-800);
}

.footer-content {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.75rem;
}

.footer-logo .highlight {
  color: var(--primary);
}

.footer-text {
  color: var(--gray-400);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-text a {
  color: var(--primary);
  text-decoration: underline;
}

.footer-text a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--dark-800);
  color: var(--gray-500);
  font-size: 0.85rem;
}

/* --- Back to Top Button --- */
.btn-back-top {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--dark-800);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 90;
}

.btn-back-top.show {
  opacity: 0.85;
  visibility: visible;
}

.btn-back-top:hover {
  opacity: 1;
  background: var(--dark-900);
  transform: translateY(-2px);
}