/* ================================================================
   Ultra Pure Water Tenerife — blog.css
   Shared styles for all blog posts and blog index
   Version: 1.1 | March 2026
   Note: reset, base body, font & html rules live in style.css
   (loaded via head-base.inc) — not duplicated here.
   ================================================================ */

/* ── CSS CUSTOM PROPERTIES (defaults – override per post) ─────── */
:root {
  --blog-accent:    #3b82f6;
  --blog-accent-dk: #1e40af;
  --blog-hero-bg:   #0f172a;
  --pb-gradient:    linear-gradient(90deg, #60a5fa, #3b82f6, #1e40af);
}

/* ── READING PROGRESS BAR ─────────────────────────────────────── */
#progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--pb-gradient);
  z-index: 1000;
  transition: width 0.1s linear;
  box-shadow: 0 0 8px rgba(59,130,246,0.5);
}

/* ── HERO — structure (image/overlay stay inline per post) ─────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
  background: var(--blog-hero-bg);
  padding-top: 64px;
}
/* Blog index hero — override any light background from style.css */
section.hero {
  background: linear-gradient(160deg, #0f1623 0%, #141b2d 60%, #111827 100%) !important;
  background-color: #0f1623 !important;
  border-radius: 0 !important;
}
section.hero h1 { color: #f9fafb !important; }
section.hero h1 span { color: #818cf8 !important; }
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.25;
  transform: scale(1.05);
  transition: transform 8s ease;
}
.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(59,130,246,0.15) 0%, transparent 70%);
  top: 10%; right: -100px;
  pointer-events: none;
  animation: pulse-glow 4s ease-in-out infinite alternate;
}
@keyframes pulse-glow {
  from { opacity: 0.5; transform: scale(1); }
  to   { opacity: 1; transform: scale(1.1); }
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 860px;
  margin: 0 auto;
  padding: 6rem 2rem 4rem;
}
.hero-eyebrow, .hero-tag {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(59,130,246,0.15);
  border: 1px solid rgba(59,130,246,0.3);
  color: #93c5fd;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.4rem 1rem; border-radius: 100px;
  margin-bottom: 1.5rem;
  animation: fade-up 0.6s ease both;
}
.hero-tag .dot {
  width: 6px; height: 6px; background: var(--blog-accent);
  border-radius: 50%;
  animation: blink 1.5s ease-in-out infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; } 50% { opacity: 0.3; }
}
.hero h1 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  animation: fade-up 0.6s 0.1s ease both;
}
.hero h1 .accent, .hero h1 span { color: var(--blog-accent); }
.hero h1 .underline-span { position: relative; display: inline-block; }
.hero h1 .underline-span::after {
  content: '';
  position: absolute; bottom: -4px; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, #f97316, #fbbf24);
  border-radius: 2px;
  animation: slide-in 0.8s 0.7s ease both;
  transform-origin: left;
}
@keyframes slide-in {
  from { transform: scaleX(0); } to { transform: scaleX(1); }
}
.hero-lead, .hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: #94a3b8;
  line-height: 1.7;
  max-width: 640px;
  margin-bottom: 2.5rem;
  animation: fade-up 0.6s 0.2s ease both;
}
.hero-meta {
  display: flex; align-items: center; gap: 1.5rem;
  flex-wrap: wrap;
  animation: fade-up 0.6s 0.3s ease both;
}
.hero-avatar { display: flex; align-items: center; gap: 0.6rem; }
.avatar-circle {
  width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, #1e40af, #3b82f6);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800; font-size: 0.85rem; color: #fff;
}
.avatar-info { font-size: 0.8rem; color: #94a3b8; line-height: 1.4; }
.avatar-info strong { color: #e2e8f0; font-weight: 600; display: block; }
.hero-divider { width: 1px; height: 32px; background: rgba(255,255,255,0.15); }
.hero-read-time {
  font-size: 0.8rem; color: #64748b;
  display: flex; align-items: center; gap: 0.4rem;
}
.hero-read-time svg { color: var(--blog-accent); }
.hero-scroll {
  position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  color: #475569; font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  animation: fade-up 0.6s 0.5s ease both;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--blog-accent), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}
@keyframes scroll-pulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50%       { opacity: 0.4; transform: scaleY(0.7); }
}
.hero-cta-row {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  animation: fade-up 0.6s 0.3s ease both;
}
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--blog-accent-dk, #1e40af); color: #fff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700; font-size: 0.95rem;
  padding: 0.85rem 1.75rem; border-radius: 100px;
  text-decoration: none; transition: all 0.2s;
}
.btn-ghost {
  color: #94a3b8; font-size: 0.85rem; text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.4rem; transition: color 0.2s;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── HERO VERDICT PILL ────────────────────────────────────────── */
.hero-verdict {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  padding: 0.5rem 1.1rem;
  color: #e2e8f0; font-size: 0.82rem;
  animation: fade-up 0.6s 0.4s ease both;
}

/* ── ARTICLE LAYOUT — both naming variants ────────────────────── */
.article-wrapper, .article-wrap {
  max-width: 1160px; margin: 0 auto;
  padding: 4rem 2rem;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 4rem;
  align-items: start;
}
.article-body { min-width: 0; }

/* ── TOC SIDEBAR ──────────────────────────────────────────────── */
.toc-sidebar { position: sticky; top: 80px; }
.toc-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 1.5rem; overflow: hidden;
}
.toc-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: #64748b; margin-bottom: 1rem;
  display: flex; align-items: center; gap: 0.5rem;
}
.toc-title::before {
  content: ''; display: block;
  width: 16px; height: 2px; background: var(--blog-accent); border-radius: 1px;
}
.toc-list { list-style: none; }
.toc-list li { margin-bottom: 0.1rem; }
.toc-list a {
  display: block;
  font-size: 0.82rem; color: #475569;
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  border-left: 2px solid transparent;
  transition: all 0.2s ease;
  line-height: 1.4;
}
.toc-list a:hover, .toc-list a.active {
  background: #eff6ff; color: #1e40af;
  border-left-color: #1e40af;
}
.toc-cta {
  margin-top: 1.25rem; padding-top: 1.25rem;
  border-top: 1px solid #e2e8f0;
}
.toc-cta a, .toc-wa {
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  background: #25d366; color: #fff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700; font-size: 0.78rem;
  padding: 0.7rem 1rem; border-radius: 10px;
  text-decoration: none; transition: all 0.2s ease;
}
.toc-cta a:hover, .toc-wa:hover { background: #1ebe5d; transform: translateY(-1px); }

/* ── ARTICLE BODY TYPOGRAPHY ──────────────────────────────────── */
.article-body p {
  font-size: 1.05rem; line-height: 1.8;
  color: #374151; margin-bottom: 1.5rem;
}
.article-body h2 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800; color: #0f172a;
  letter-spacing: -0.03em;
  margin: 3rem 0 1rem; padding-top: 1rem;
  line-height: 1.2;
}
.article-body h3 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.25rem; font-weight: 700;
  color: #1e293b; margin: 2rem 0 0.75rem;
  letter-spacing: -0.02em;
}
.article-body a {
  color: #1e40af; text-decoration: underline;
  text-underline-offset: 3px; text-decoration-color: #bfdbfe;
  transition: color 0.2s, text-decoration-color 0.2s;
}
.article-body a:hover { color: #1d4ed8; text-decoration-color: #1d4ed8; }
.article-body ul, .article-body ol {
  padding-left: 1.5rem; margin-bottom: 1.5rem;
}
.article-body li { font-size: 1.05rem; line-height: 1.8; color: #374151; margin-bottom: 0.4rem; }

/* ── INTRO HOOK ───────────────────────────────────────────────── */
.intro-hook {
  background: #0f172a;
  border-radius: 20px; padding: 2.5rem;
  margin-bottom: 2.5rem;
  position: relative; overflow: hidden;
}
.intro-hook::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, #f97316, #fbbf24, #f97316);
}
.intro-hook p {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.15rem; font-weight: 500;
  color: #e2e8f0; line-height: 1.7; margin-bottom: 0;
}
.intro-hook p strong { color: #fbbf24; }

/* ── PULL QUOTE ───────────────────────────────────────────────── */
.pull-quote {
  position: relative;
  margin: 2.5rem 0;
  padding: 2rem 2rem 2rem 3.5rem;
  border-radius: 16px;
  background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
  border-left: 4px solid #1e40af;
}
.pull-quote::before {
  content: '\201C';
  position: absolute; left: 1rem; top: 0.5rem;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 4rem; font-weight: 800;
  color: #bfdbfe; line-height: 1;
}
.pull-quote p {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.15rem; font-weight: 600;
  color: #1e3a8a; line-height: 1.6;
  margin-bottom: 0 !important; font-style: italic;
}
.pull-quote cite {
  display: block; margin-top: 0.75rem;
  font-size: 0.8rem; color: #64748b; font-style: normal;
}

/* ── IMAGE CALLOUT ────────────────────────────────────────────── */
.img-callout {
  border-radius: 20px; overflow: hidden;
  margin: 2.5rem 0; position: relative;
}
.img-callout img {
  width: 100%; height: 320px;
  object-fit: cover; display: block;
}
.img-callout.tall img { height: 420px; }
.img-callout figcaption {
  background: #f8fafc;
  border: 1px solid #e2e8f0; border-top: none;
  padding: 0.75rem 1.25rem;
  font-size: 0.78rem; color: #64748b; font-style: italic;
  display: flex; align-items: center; gap: 0.5rem;
}
.img-callout figcaption svg { color: #94a3b8; flex-shrink: 0; }

/* ── CALLOUT BOX (coloured info boxes — multiple variants) ─────── */
.callout-box {
  border-radius: 16px; padding: 1.5rem 1.75rem;
  margin: 1.75rem 0; border-left: 4px solid;
}
.callout-box strong {
  display: block; font-size: 0.85rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.4rem;
}
.callout-box p { font-size: 0.92rem; line-height: 1.65; margin: 0; }
/* amber */
.callout-box.amber { background: #fff7ed; border-left-color: #d97706; }
.callout-box.amber strong { color: #92400e; }
.callout-box.amber p { color: #78350f; }
/* green */
.callout-box.green { background: #f0fdf4; border-left-color: #16a34a; }
.callout-box.green strong { color: #14532d; }
.callout-box.green p { color: #166534; }
/* blue */
.callout-box.blue { background: #eff6ff; border-left-color: #2563eb; }
.callout-box.blue strong { color: #1e3a8a; }
.callout-box.blue p { color: #1e40af; }
/* rose */
.callout-box.rose { background: #fff0f6; border-left-color: #be185d; }
.callout-box.rose strong { color: #9d174d; }
.callout-box.rose p { color: #831843; }
/* red */
.callout-box.red { background: #fff1f2; border-left-color: #dc2626; }
.callout-box.red strong { color: #991b1b; }
.callout-box.red p { color: #7f1d1d; }
/* orange */
.callout-box.orange { background: #fff7ed; border-left-color: #ea580c; }
.callout-box.orange strong { color: #9a3412; }
.callout-box.orange p { color: #7c2d12; }
/* cyan */
.callout-box.cyan { background: #eff6ff; border-left-color: #3b82f6; }
.callout-box.cyan strong { color: #155e75; }
.callout-box.cyan p { color: #164e63; }
/* teal */
.callout-box.teal { background: #f0fdfa; border-left-color: #0d9488; }
.callout-box.teal strong { color: #134e4a; }
.callout-box.teal p { color: #115e59; }
/* sky */
.callout-box.sky { background: #f0f9ff; border-left-color: #0ea5e9; }
.callout-box.sky strong { color: #075985; }
.callout-box.sky p { color: #0c4a6e; }
/* violet */
.callout-box.violet { background: #eff6ff; border-left-color: #1e40af; }
.callout-box.violet strong { color: #4c1d95; }
.callout-box.violet p { color: #3b0764; }

/* ── CALLOUT (alternative icon-led style) ─────────────────────── */
.callout {
  border-radius: 16px; padding: 1.5rem 1.75rem;
  margin: 2rem 0; display: flex; gap: 1rem; align-items: flex-start;
}
.callout.info    { background: #eff6ff; border: 1px solid #bfdbfe; }
.callout.tip     { background: #f0fdf4; border: 1px solid #bbf7d0; }
.callout.warning { background: #fff7ed; border: 1px solid #fed7aa; }
.callout-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 0.1rem; }
.callout-body { flex: 1; }
.callout-body strong {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.9rem; font-weight: 700;
  display: block; margin-bottom: 0.3rem;
}
.callout.info    .callout-body strong { color: #1e40af; }
.callout.tip     .callout-body strong { color: #15803d; }
.callout.warning .callout-body strong { color: #c2410c; }
.callout-body p {
  font-size: 0.88rem; color: #374151;
  line-height: 1.6; margin-bottom: 0 !important;
}

/* ── MAIN CTA SECTION ─────────────────────────────────────────── */
.cta-section {
  background: #0f172a;
  border-radius: 24px; overflow: hidden;
  margin: 3rem 0; padding: 3rem 2.5rem;
  position: relative; text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% -20%, rgba(30,64,175,0.4) 0%, transparent 60%);
  pointer-events: none;
}
.cta-section::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, #3b82f6, #1e40af, #3b82f6, transparent);
}
.cta-eyebrow {
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: #93c5fd; margin-bottom: 1rem;
  position: relative; z-index: 1;
}
.cta-heading,
.cta-section h2 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800; color: #ffffff;
  letter-spacing: -0.03em; line-height: 1.2;
  margin-bottom: 0.75rem; position: relative; z-index: 1;
}
.cta-subtext,
.cta-section p {
  font-size: 1rem; color: #94a3b8;
  margin-bottom: 2rem; position: relative; z-index: 1;
}
.cta-note {
  font-size: 0.78rem; color: #475569;
  margin-top: 1rem; position: relative; z-index: 1;
}
.cta-glow {
  position: absolute; width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(6,182,212,0.1) 0%, transparent 70%);
  bottom: -100px; left: 50%; transform: translateX(-50%);
  pointer-events: none;
}
.cta-buttons {
  display: flex; gap: 1rem; justify-content: center;
  flex-wrap: wrap; position: relative; z-index: 1;
}
.cta-section a { text-decoration: none; color: inherit; }
.cta-btn-wa, .btn-whatsapp {
  display: inline-flex; align-items: center; gap: 0.6rem;
  background: #25d366; color: #ffffff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700; font-size: 0.95rem;
  padding: 0.9rem 2rem; border-radius: 100px;
  text-decoration: none; transition: all 0.25s ease;
  animation: whatsapp-pulse 2.5s ease-in-out infinite;
}
@keyframes whatsapp-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37,211,102,0); }
  50%       { box-shadow: 0 0 0 10px rgba(37,211,102,0); }
}
.cta-btn-wa:hover, .btn-whatsapp:hover { background: #1ebe5d; transform: translateY(-2px); }
.cta-btn-secondary, .btn-secondary {
  display: inline-flex; align-items: center; gap: 0.6rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: #e2e8f0;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600; font-size: 0.9rem;
  padding: 0.9rem 2rem; border-radius: 100px;
  text-decoration: none; transition: all 0.25s ease;
}
.cta-btn-secondary:hover, .btn-secondary:hover { background: rgba(255,255,255,0.12); }
.cta-trust {
  margin-top: 1.5rem;
  display: flex; align-items: center; justify-content: center; gap: 1.5rem;
  flex-wrap: wrap; position: relative; z-index: 1;
}
.trust-item {
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.78rem; color: #64748b;
}
.trust-item svg { color: var(--blog-accent); }

/* ── FAQ SECTION ──────────────────────────────────────────────── */
.faq-section { margin: 2.5rem 0; }
.faq-item {
  border: 1px solid #e2e8f0; border-radius: 12px;
  margin-bottom: 0.5rem; overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item:hover { border-color: #bfdbfe; }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 1.25rem; cursor: pointer;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.95rem; font-weight: 700; color: #1e293b;
  list-style: none; user-select: none;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-chevron {
  width: 20px; height: 20px; flex-shrink: 0;
  border-radius: 50%;
  background: #eff6ff; color: #1e40af;
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.2s ease;
}
details[open] .faq-chevron { transform: rotate(180deg); }
.faq-a {
  padding: 0 1.25rem 1.1rem;
  font-size: 0.9rem; color: #4b5563; line-height: 1.7;
}

/* ── AUTHOR BOX ───────────────────────────────────────────────── */
.author-box {
  display: flex; gap: 1.25rem; align-items: flex-start;
  background: #f8fafc; border: 1px solid #e2e8f0;
  border-radius: 16px; padding: 1.5rem;
  margin: 2.5rem 0;
}
.author-avatar {
  width: 60px; height: 60px; border-radius: 50%;
  background: linear-gradient(135deg, #1e40af, #3b82f6);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.2rem; font-weight: 800; color: #fff; flex-shrink: 0;
}
.author-info h4 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1rem; font-weight: 700; color: #1e293b; margin-bottom: 0.2rem;
}
.author-info .author-role { font-size: 0.78rem; color: #64748b; margin-bottom: 0.5rem; }
.author-info p { font-size: 0.85rem; color: #4b5563; line-height: 1.6; margin-bottom: 0 !important; }

/* ── PRODUCT CARDS ────────────────────────────────────────────── */
.products-section { margin: 2.5rem 0; }
.products-heading {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: #64748b; margin-bottom: 1.25rem;
}
.products-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.product-card {
  display: grid; grid-template-columns: auto 1fr auto;
  gap: 1.25rem; align-items: center;
  background: #ffffff; border: 1px solid #e2e8f0;
  border-radius: 16px; padding: 1.25rem 1.5rem;
  text-decoration: none; transition: all 0.25s ease;
  position: relative; overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
}
.product-card.tier-1::before { background: #86efac; }
.product-card.tier-2::before { background: #60a5fa; }
.product-card.tier-3::before { background: linear-gradient(to bottom, #3b82f6, #1e40af); }
.product-card:hover {
  box-shadow: 0 8px 32px rgba(30,64,175,0.12);
  transform: translateY(-2px); border-color: #bfdbfe;
}
.product-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; flex-shrink: 0;
}
.tier-1 .product-icon { background: #f0fdf4; }
.tier-2 .product-icon { background: #eff6ff; }
.tier-3 .product-icon { background: #f5f3ff; }
.product-info h4 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.95rem; font-weight: 700; color: #1e293b; margin-bottom: 0.2rem;
}
.product-info p { font-size: 0.8rem; color: #64748b; line-height: 1.5; margin-bottom: 0 !important; }
.product-price { text-align: right; flex-shrink: 0; }
.price-from { font-size: 0.7rem; color: #94a3b8; display: block; }
.price-num {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.4rem; font-weight: 800; color: #1e40af;
}
.price-installed { font-size: 0.7rem; color: #94a3b8; }
.popular-badge {
  position: absolute; top: 0.75rem; right: 1rem;
  background: linear-gradient(135deg, #3b82f6, #1e40af);
  color: #fff; font-size: 0.65rem; font-weight: 700;
  padding: 0.2rem 0.6rem; border-radius: 100px;
  letter-spacing: 0.05em; text-transform: uppercase;
}

/* ── SCROLL / REVEAL ANIMATIONS ──────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible, .reveal.animated { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.scroll-animate {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.scroll-animate.visible, .scroll-animate.animated {
  opacity: 1; transform: translateY(0);
}

/* ── WHATSAPP FLOAT BUTTON (if used on blog pages) ────────────── */
.whatsapp-float {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25d366;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(37,211,102,0.4);
  z-index: 800; text-decoration: none;
  transition: all 0.2s ease;
}
.whatsapp-float:hover { background: #1ebe5d; transform: scale(1.08); }
.whatsapp-float svg { width: 28px; height: 28px; fill: #fff; }

/* ── RESPONSIVE ───────────────────────────────────────────────── */
@media (max-width: 900px) {
  .article-wrapper, .article-wrap {
    grid-template-columns: 1fr;
    gap: 0; padding: 2.5rem 1.25rem;
  }
  .toc-sidebar { display: none; }
  .hero-content { padding: 4rem 1.25rem 3rem; }
}
@media (max-width: 600px) {
  .product-card { grid-template-columns: auto 1fr; }
  .product-price { display: none; }
  .cta-section { padding: 2rem 1.25rem; }
  .author-box { flex-direction: column; }
  .author-avatar { align-self: flex-start; }
}