/* ===== VARIABLES ===== */
:root {
  --black: #1a1a1a;
  --sky: #78b4dc;
  --sage: #6b9b8a;
  --seafoam: #e8f2f0;
  --white: #ffffff;
  --grey: #888888;
  --light-grey: #f5f5f5;
}

/* ===== RESET + BASE ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { overflow-x: hidden; }

body {
  font-family: 'Montserrat', sans-serif;
  font-weight: 300;
  font-size: 16px;
  line-height: 1.8;
  color: var(--black);
  background: var(--white);
}

a { color: var(--sky); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: #5a9cc8; }

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  z-index: 1000;
  border-bottom: 1px solid var(--light-grey);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 20px;
  text-decoration: none;
  color: var(--black);
}

.nav-logo-icon { width: 50px; height: 50px; }
.nav-logo-text { font-weight: 200; font-size: 1.1rem; letter-spacing: 0.4em; }
.nav-logo-online { color: var(--sky); font-weight: 300; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 35px;
  list-style: none;
}

.nav-links a {
  color: var(--black);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-links a:hover { color: var(--sky); }

.nav-cta {
  background: var(--black);
  color: var(--white) !important;
  padding: 15px 35px;
  text-decoration: none;
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  transition: all 0.3s ease;
}

.nav-cta:hover { background: var(--sky); color: var(--white) !important; }

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--black);
  margin: 5px 0;
  transition: all 0.3s ease;
}

.nav-hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-hamburger.active span:nth-child(2) { opacity: 0; }
.nav-hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.nav-mobile {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255, 255, 255, 0.99);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 30px;
}

.nav-mobile.active { display: flex; }

.nav-mobile a {
  color: var(--black);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  text-decoration: none;
}

.nav-mobile a:hover { color: var(--sky); }

/* ===== BREADCRUMB ===== */
.breadcrumb {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 30px;
}

.breadcrumb a { color: var(--grey); }
.breadcrumb a:hover { color: var(--sky); }
.breadcrumb span { color: var(--grey); margin: 0 8px; }

/* ===== ARTICLE HEADER ===== */
.article-header {
  padding: 180px 60px 80px;
  background: var(--seafoam);
}

.article-header-inner { max-width: 800px; margin: 0 auto; }

.article-category {
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--sky);
  margin-bottom: 20px;
}

.article-title {
  font-weight: 200;
  font-size: 2.5rem;
  letter-spacing: 0.1em;
  color: var(--black);
  line-height: 1.3;
}

.back-link {
  display: inline-block;
  margin-bottom: 30px;
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* ===== ARTICLE CONTENT (Blog = 700px) ===== */
.article-content {
  max-width: 700px;
  margin: 0 auto;
  padding: 80px 60px;
}

.article-content p {
  margin-bottom: 25px;
  color: #444;
  font-size: 1rem;
  line-height: 2;
}

.article-content h2 {
  font-weight: 400;
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  color: var(--black);
  margin: 50px 0 25px;
}

.article-content h3 {
  font-weight: 400;
  font-size: 1.1rem;
  color: var(--black);
  margin: 40px 0 20px;
}

.article-content ul, .article-content ol {
  margin: 25px 0;
  padding-left: 30px;
}

.article-content li {
  margin-bottom: 15px;
  color: #444;
  line-height: 1.9;
}

.article-content blockquote {
  margin: 40px 0;
  padding: 30px 40px;
  background: var(--seafoam);
  border-left: 3px solid var(--sage);
  font-style: italic;
  color: #555;
}

.article-content strong { font-weight: 500; color: var(--black); }

/* ===== PILLAR CONTENT (800px wide) ===== */
.pillar-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 80px 60px;
}

.pillar-content p {
  margin-bottom: 25px;
  color: #444;
  font-size: 1rem;
  line-height: 2;
}

.pillar-content h2 {
  font-weight: 400;
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  color: var(--black);
  margin: 50px 0 25px;
}

.pillar-content h3 {
  font-weight: 400;
  font-size: 1.1rem;
  color: var(--black);
  margin: 40px 0 20px;
}

.pillar-content ul, .pillar-content ol {
  margin: 25px 0;
  padding-left: 30px;
}

.pillar-content li {
  margin-bottom: 15px;
  color: #444;
  line-height: 1.9;
}

.pillar-content blockquote {
  margin: 40px 0;
  padding: 30px 40px;
  background: var(--seafoam);
  border-left: 3px solid var(--sage);
  font-style: italic;
  color: #555;
}

.pillar-content strong { font-weight: 500; color: var(--black); }

/* ===== DIRECT ANSWER BLOCK (LLM-extractable) ===== */
.direct-answer {
  background: var(--seafoam);
  border-left: 4px solid var(--sky);
  padding: 30px 40px;
  margin: 40px 0;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--black);
}

.direct-answer p { margin-bottom: 0; color: var(--black); }

/* ===== HIGHLIGHT BOX ===== */
.highlight-box {
  background: var(--light-grey);
  padding: 30px 40px;
  margin: 40px 0;
  border-left: 3px solid var(--sky);
}

.highlight-box p { margin-bottom: 0; }

/* ===== OVERLAY EXAMPLES ===== */
.overlay-example {
  background: var(--light-grey);
  padding: 25px 30px;
  margin: 20px 0;
}

.overlay-example h4 {
  font-weight: 400;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--sky);
  margin-bottom: 15px;
}

.overlay-example p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ===== COMPARISON TABLE ===== */
.comparison-table {
  width: 100%;
  margin: 40px 0;
  border-collapse: collapse;
}

.comparison-table th {
  background: var(--black);
  color: var(--white);
  padding: 15px 20px;
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-align: left;
  text-transform: uppercase;
}

.comparison-table td {
  padding: 15px 20px;
  border-bottom: 1px solid var(--light-grey);
  vertical-align: top;
  font-size: 0.95rem;
}

.comparison-table tr:nth-child(even) td {
  background: var(--light-grey);
}

.comparison-table td strong {
  font-weight: 500;
}

.comparison-table th strong,
.perspectives-table th strong { color: inherit; }

/* ===== "WHAT THIS IS NOT" LIST ===== */
.not-list {
  margin: 30px 0;
  padding: 0;
  list-style: none;
}

.not-list li {
  padding: 12px 0 12px 30px;
  border-bottom: 1px solid var(--light-grey);
  position: relative;
  color: #444;
}

.not-list li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: var(--grey);
  font-size: 0.8rem;
}

/* ===== ARTICLE CTA ===== */
.article-cta {
  background: var(--black);
  color: var(--white);
  padding: 60px;
  margin: 60px 0;
  text-align: center;
}

.article-cta h3 {
  font-weight: 200;
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  color: var(--white);
}

.article-cta p { color: rgba(255,255,255,0.75); margin-bottom: 30px; }
.article-cta .cta-note { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 20px; margin-bottom: 0; }

.article-cta a {
  display: inline-block;
  background: var(--white);
  color: var(--black);
  padding: 18px 50px;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: all 0.3s ease;
}

.article-cta a:hover { background: var(--sky); color: var(--white); }

/* ===== RELATED CONCEPTS ===== */
.related-concepts {
  margin: 60px 0 0;
  padding-top: 40px;
  border-top: 1px solid var(--light-grey);
}

.related-concepts h3 {
  font-weight: 400;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 20px;
}

.related-concepts ul {
  list-style: none;
  padding: 0;
}

.related-concepts li {
  padding: 10px 0;
  border-bottom: 1px solid var(--light-grey);
}

.related-concepts li:last-child { border-bottom: none; }

.related-concepts a {
  font-size: 0.95rem;
  font-weight: 400;
}

/* ===== FAQ SECTION ===== */
.faq-section {
  margin: 60px 0;
}

.faq-section h2 {
  font-weight: 400;
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  color: var(--black);
  margin-bottom: 30px;
}

.faq-item {
  padding: 25px 0;
  border-bottom: 1px solid var(--light-grey);
}

.faq-item h3 {
  font-weight: 400;
  font-size: 1rem;
  color: var(--black);
  margin-bottom: 15px;
}

.faq-item p {
  color: #444;
  font-size: 0.95rem;
  line-height: 1.9;
  margin-bottom: 0;
}

/* ===== WHATSAPP FLOAT ===== */
.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 56px;
  height: 56px;
  background: var(--black);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  transition: background 0.3s ease;
  text-decoration: none;
}

.whatsapp-float:hover { background: var(--sky); }

.whatsapp-float svg { width: 28px; height: 28px; fill: var(--white); }

/* ===== FOOTER ===== */
.footer {
  background: var(--black);
  color: var(--grey);
  text-align: center;
  padding: 80px 60px;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 30px;
}

.footer-logo svg { width: 50px; height: 50px; }
.footer-logo-text { font-weight: 200; font-size: 1rem; letter-spacing: 0.4em; color: var(--white); }
.footer-online { color: var(--sky); font-weight: 300; }

.footer-copyright {
  font-weight: 300;
  font-size: 0.6rem;
  color: #555;
  letter-spacing: 0.15em;
  padding-top: 40px;
  border-top: 1px solid #333;
}

/* ===== COMPARISON GRID (Force vs Flow) ===== */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin: 40px 0;
}

.comparison-box {
  padding: 30px;
  background: var(--light-grey);
}

.comparison-box.dark {
  background: var(--black);
  color: var(--white);
}

.comparison-box h4 {
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 20px;
  color: var(--sky);
}

.comparison-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.comparison-box li {
  padding: 10px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.comparison-box.dark li {
  border-color: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.8);
}

/* ===== PERSPECTIVES TABLE ===== */
.perspectives-wrapper {
  overflow-x: auto;
  margin: 40px 0;
  -webkit-overflow-scrolling: touch;
}

.perspectives-table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
  font-size: 0.78rem;
  table-layout: fixed;
}

.perspectives-table th {
  background: var(--black);
  color: var(--white);
  padding: 10px 8px;
  text-align: left;
  font-weight: 400;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.perspectives-table td {
  padding: 10px 8px;
  border-bottom: 1px solid var(--light-grey);
  vertical-align: top;
  line-height: 1.5;
  color: #444;
}

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

.perspectives-table td:first-child {
  font-weight: 500;
  color: var(--black);
  background: var(--seafoam);
}

.perspectives-intro {
  font-size: 0.8rem;
  color: var(--grey);
  font-style: italic;
  margin-top: 15px;
  margin-bottom: 20px;
  line-height: 1.7;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-container { padding: 15px 24px; }
  .nav-logo-text { display: none; }
  .nav-links { display: none; }
  .nav-hamburger { display: block; }
  .nav-cta { padding: 12px 20px; font-size: 0.6rem; }

  .article-header { padding: 140px 24px 60px; }
  .article-title { font-size: 1.8rem; }

  .article-content { padding: 60px 24px; }
  .article-content h2 { font-size: 1.2rem; }

  .pillar-content { padding: 60px 24px; }
  .pillar-content h2 { font-size: 1.2rem; }

  .direct-answer { padding: 25px 24px; }

  .comparison-table { font-size: 0.85rem; }
  .comparison-table th, .comparison-table td { padding: 10px 12px; }

  .article-cta { padding: 40px 24px; }

  .comparison-grid { grid-template-columns: 1fr; }

  .footer { padding: 60px 24px; }
  .footer-logo { flex-direction: column; gap: 15px; }

  .whatsapp-float { bottom: 20px; right: 20px; width: 50px; height: 50px; }
  .whatsapp-float svg { width: 24px; height: 24px; }
}

@media (max-width: 480px) {
  .article-title { font-size: 1.5rem; }
  .comparison-table { font-size: 0.8rem; display: block; overflow-x: auto; }
}