@import url("/whatsapp-float.css");

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

:root {
  --white:   #ffffff;
  --bg:      #f5f5f7;
  --mid:     #e8e8ed;
  --sub:     #6e6e73;
  --dark:    #1d1d1f;
  --black:   #000000;
  --radius:  18px;
  --max:     980px;
  --article: 680px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--white);
  color: var(--dark);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--mid);
  height: 48px;
  display: flex; align-items: center; justify-content: center;
}

.nav-inner {
  max-width: var(--max);
  width: 100%; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}

.nav-logo {
  font-size: 17px; font-weight: 600; color: var(--dark);
  text-decoration: none; letter-spacing: -0.3px;
}

.nav-links {
  display: flex; gap: 28px; list-style: none;
}

.nav-links a {
  font-size: 13px; color: var(--dark); text-decoration: none;
  opacity: 0.8; transition: opacity .2s;
}

.nav-links a:hover,
.nav-links a.active { opacity: 1; }

.nav-cta {
  font-size: 13px; font-weight: 500;
  background: var(--dark); color: var(--white);
  padding: 7px 16px; border-radius: 980px;
  text-decoration: none; transition: opacity .2s;
}

.nav-cta:hover { opacity: 0.8; }

.nav-menu-btn {
  display: none; background: none; border: none;
  cursor: pointer; padding: 4px; color: var(--dark);
}

.btn-primary {
  display: inline-block;
  background: var(--dark); color: var(--white);
  font-size: 17px; font-weight: 500;
  padding: 16px 32px; border-radius: 980px;
  text-decoration: none; transition: opacity .2s;
  letter-spacing: -0.01em;
}

.btn-primary:hover { opacity: 0.8; }

.blog-main {
  padding: 120px 24px 80px;
  min-height: 60vh;
}

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

.blog-header {
  max-width: var(--article);
  margin: 0 auto 56px;
}

.section-eyebrow {
  font-size: 13px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--sub); margin-bottom: 14px;
}

.section-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700; letter-spacing: -0.03em;
  color: var(--black); line-height: 1.1;
}

.section-sub {
  font-size: 17px; color: var(--sub);
  margin-top: 14px; line-height: 1.6;
}

.blog-card {
  display: block;
  max-width: var(--article);
  margin: 0 auto;
  padding: 32px;
  background: var(--bg);
  border: 1px solid var(--mid);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: transform .2s, box-shadow .2s;
}

.blog-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.07);
}

.blog-card-tag {
  display: inline-block;
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--sub);
  background: var(--white);
  border: 1px solid var(--mid);
  padding: 4px 10px; border-radius: 980px;
  margin-bottom: 16px;
}

.blog-card-title {
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 700; letter-spacing: -0.02em;
  color: var(--black); line-height: 1.2;
  margin-bottom: 12px;
}

.blog-card-excerpt {
  font-size: 16px; color: var(--sub);
  line-height: 1.6; margin-bottom: 20px;
}

.blog-card-meta {
  font-size: 13px; color: var(--sub);
  display: flex; flex-wrap: wrap; gap: 8px 16px;
}

.blog-card-link {
  font-size: 14px; font-weight: 500;
  color: var(--dark); margin-top: 20px;
}

.blog-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: var(--article);
  margin: 0 auto;
}

.blog-list .blog-card {
  margin: 0;
  max-width: none;
}

.article-wrap {
  max-width: var(--article);
  margin: 0 auto;
}

.article-back {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; color: var(--sub);
  text-decoration: none; margin-bottom: 32px;
  transition: color .2s;
}

.article-back:hover { color: var(--dark); }

.article-header { margin-bottom: 40px; }

.article-title {
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700; letter-spacing: -0.03em;
  color: var(--black); line-height: 1.15;
  margin-bottom: 16px;
}

.article-meta {
  font-size: 14px; color: var(--sub);
  display: flex; flex-wrap: wrap; gap: 8px 20px;
}

.article-body {
  font-size: 17px; line-height: 1.75;
  color: var(--dark);
}

.article-body > * + * { margin-top: 1.25em; }

.article-body h2 {
  font-size: clamp(22px, 4vw, 26px);
  font-weight: 700; letter-spacing: -0.02em;
  color: var(--black); line-height: 1.25;
  margin-top: 2.5em;
}

.article-body h3 {
  font-size: clamp(18px, 3vw, 21px);
  font-weight: 600; letter-spacing: -0.02em;
  color: var(--black); line-height: 1.3;
  margin-top: 1.75em;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--mid);
  margin: 2.5em 0;
}

.article-body strong { font-weight: 600; color: var(--black); }

.article-body em { font-style: italic; }

.article-body ul {
  list-style: none;
  display: flex; flex-direction: column; gap: 12px;
  padding-left: 0;
}

.article-body ul li {
  padding-left: 20px;
  position: relative;
}

.article-body ul li::before {
  content: "—";
  position: absolute; left: 0;
  color: var(--sub);
}

.article-body .highlight {
  font-size: 16px; color: var(--sub);
  padding: 16px 20px;
  background: var(--bg);
  border-left: 3px solid var(--dark);
  border-radius: 0 12px 12px 0;
}

.blog-cta {
  margin-top: 56px;
  padding: 40px 32px;
  background: var(--bg);
  border: 1px solid var(--mid);
  border-radius: var(--radius);
  text-align: center;
}

.blog-cta h2 {
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 700; letter-spacing: -0.02em;
  color: var(--black);
  margin-bottom: 12px;
}

.blog-cta p {
  font-size: 16px; color: var(--sub);
  line-height: 1.6; max-width: 480px;
  margin: 0 auto 24px;
}

footer {
  background: var(--dark); color: var(--white);
  padding: 60px 24px 40px;
}

.footer-inner { max-width: var(--max); margin: 0 auto; }

.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 48px; padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand { font-size: 17px; font-weight: 600; margin-bottom: 12px; }

.footer-brand-sub {
  font-size: 14px; color: rgba(255,255,255,0.45);
  line-height: 1.6; max-width: 300px;
}

.footer-col-title {
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: rgba(255,255,255,0.4); margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex; flex-direction: column; gap: 10px;
}

.footer-links a {
  font-size: 14px; color: rgba(255,255,255,0.6);
  text-decoration: none; transition: color .2s;
}

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

.footer-bottom {
  margin-top: 36px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: rgba(255,255,255,0.35);
  flex-wrap: wrap; gap: 12px;
}

.footer-bottom-links { display: flex; gap: 20px; }

.footer-bottom-links a {
  color: rgba(255,255,255,0.35); text-decoration: none;
}

.mobile-nav {
  display: none;
  position: fixed; inset: 0; z-index: 200;
}

.mobile-nav.open { display: block; }

.mobile-nav-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.4);
}

.mobile-nav-panel {
  position: absolute; top: 0; right: 0; bottom: 0;
  width: 280px;
  background: var(--white);
  padding: 64px 32px 32px;
  display: flex; flex-direction: column; gap: 8px;
}

.mobile-nav-close {
  position: absolute; top: 16px; right: 20px;
  background: none; border: none; cursor: pointer;
  font-size: 28px; color: var(--dark); line-height: 1;
}

.mobile-nav-panel a {
  font-size: 18px; color: var(--dark);
  text-decoration: none; padding: 10px 0;
  border-bottom: 1px solid var(--mid);
}

.mobile-nav-panel .btn-primary {
  font-size: 16px; text-align: center;
  margin-top: 16px; padding: 14px 24px;
  color: var(--white); border-bottom: none;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-menu-btn { display: block; }

  .blog-main { padding: 96px 20px 64px; }

  .blog-card { padding: 24px; }

  .blog-cta { padding: 32px 24px; }

  .footer-top { grid-template-columns: 1fr; gap: 32px; }

  .footer-bottom { flex-direction: column; align-items: flex-start; }
}