*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { padding-left: 1.5em; }

:root {
  --ec-accent: #2563eb;
  --ec-accent-light: #60a5fa;
  --ec-accent-dark: #1d4ed8;
  --ec-accent-glow: rgba(37, 99, 235, 0.25);
  --ec-secondary: #7c3aed;
  --ec-black: #0f172a;
  --ec-dark: #1e293b;
  --ec-gray-200: #e2e8f0;
  --ec-off-white: #f8fafc;
  --ec-white: #ffffff;
  --ec-text-primary: #0f172a;
  --ec-text-secondary: #475569;
  --ec-text-muted: #94a3b8;
  --ec-text-on-dark: #ffffff;
  --ec-text-on-dark-muted: rgba(255, 255, 255, 0.65);
  --ec-shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --ec-shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --ec-shadow-lg: 0 16px 48px rgba(0,0,0,0.1);
  --ec-radius: 12px;
  --ec-radius-lg: 16px;
  --ec-radius-xl: 24px;
  --ec-radius-pill: 100px;
  --ec-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ec-container: 1200px;
}

html { scroll-behavior: smooth; }
body { font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif; -webkit-font-smoothing: antialiased; color: var(--ec-text-primary); background: var(--ec-white); overflow-x: hidden; }
::selection { background: rgba(37, 99, 235, 0.15); color: var(--ec-black); }
body::before { content: ''; position: fixed; top: 0; left: 0; width: var(--scroll-progress, 0%); height: 2px; background: linear-gradient(90deg, var(--ec-accent), var(--ec-secondary)); z-index: 999999; pointer-events: none; transition: width 0.08s linear; }

h1, h2, h3, h4 { font-family: 'Outfit', sans-serif; font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; color: var(--ec-text-primary); }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -0.03em; line-height: 1.1; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 48px; margin-bottom: 20px; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); font-weight: 600; margin-top: 36px; margin-bottom: 16px; }
p { font-size: 1.06rem; line-height: 1.8; color: var(--ec-text-secondary); margin-bottom: 20px; }

.container { max-width: var(--ec-container); margin: 0 auto; padding: 0 24px; }

.navbar { position: fixed; top: 0; left: 0; right: 0; background: rgba(255, 255, 255, 0.85); backdrop-filter: blur(24px) saturate(180%); -webkit-backdrop-filter: blur(24px) saturate(180%); border-bottom: 1px solid var(--ec-gray-200); z-index: 9999; transition: background 0.35s var(--ec-ease), padding 0.35s var(--ec-ease); padding: 16px 0; }
.navbar.ec-scrolled { background: rgba(255, 255, 255, 0.95); box-shadow: 0 1px 20px rgba(0,0,0,0.06); padding: 10px 0; }
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.navbar .logo { font-weight: 700; font-size: 1.4rem; color: var(--ec-text-primary); letter-spacing: -0.02em; }
.navbar .logo span { color: var(--ec-accent); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { font-weight: 400; font-size: 0.875rem; color: var(--ec-text-secondary); padding: 8px 14px; border-radius: 8px; transition: color 0.2s var(--ec-ease), background 0.2s var(--ec-ease); }
.nav-links a:hover { color: var(--ec-accent); background: rgba(37,99,235,0.06); }
.nav-links a.active { color: var(--ec-accent); }
.nav-cta { background: var(--ec-accent) !important; color: var(--ec-white) !important; border-radius: var(--ec-radius-pill) !important; padding: 10px 22px !important; font-weight: 600 !important; }
.nav-cta:hover { background: var(--ec-accent-dark) !important; transform: translateY(-1px) !important; box-shadow: 0 4px 24px var(--ec-accent-glow) !important; }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--ec-text-primary); }
@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(255,255,255,0.98); flex-direction: column; padding: 16px 24px; border-bottom: 1px solid var(--ec-gray-200); box-shadow: var(--ec-shadow-lg); backdrop-filter: blur(24px); }
  .nav-links.open { display: flex; }
  .nav-cta { width: 100%; text-align: center; margin-top: 8px; }
}

.article-hero { padding: 140px 0 0; background: linear-gradient(160deg, #f0f4ff 0%, #e0e7ff 30%, #dbeafe 60%, #f8fafc 100%); position: relative; overflow: hidden; }
.article-hero::after { content: ''; position: absolute; top: -200px; right: -150px; width: 700px; height: 700px; background: radial-gradient(circle, rgba(37,99,235,0.1) 0%, rgba(124,58,237,0.05) 40%, transparent 65%); border-radius: 50%; pointer-events: none; z-index: 1; }
.article-hero .container { position: relative; z-index: 2; }
.article-hero-cover { width: 100%; height: 400px; border-radius: var(--ec-radius-xl) var(--ec-radius-xl) 0 0; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; margin-top: 40px; }
.article-hero-cover .blog-img-icon { font-size: 5rem; color: rgba(255,255,255,0.95); z-index: 2; filter: drop-shadow(0 4px 12px rgba(0,0,0,0.15)); }
.article-hero-cover::after { content: ''; position: absolute; width: 300px; height: 300px; border-radius: 50%; background: rgba(255,255,255,0.08); top: -60px; right: -60px; z-index: 1; }
.article-meta-bar { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; margin-bottom: 20px; }
.article-tag { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ec-accent); background: rgba(37,99,235,0.08); padding: 4px 12px; border-radius: var(--ec-radius-pill); }
.article-meta { font-size: 0.85rem; color: var(--ec-text-muted); display: flex; align-items: center; gap: 6px; }
.back-link { font-size: 0.85rem; color: var(--ec-accent); font-weight: 500; display: inline-flex; align-items: center; gap: 6px; margin-bottom: 24px; transition: gap 0.3s; }
.back-link:hover { gap: 10px; }

.article-content { max-width: 760px; margin: 0 auto; padding: 60px 24px 80px; }
.article-content p { margin-bottom: 24px; }
.article-content ul, .article-content ol { margin-bottom: 24px; color: var(--ec-text-secondary); line-height: 1.8; font-size: 1.06rem; }
.article-content li { margin-bottom: 8px; }
.article-content blockquote { border-left: 3px solid var(--ec-accent); padding: 20px 24px; margin: 32px 0; background: var(--ec-off-white); border-radius: 0 var(--ec-radius) var(--ec-radius) 0; font-style: italic; color: var(--ec-text-secondary); }
.article-content strong { color: var(--ec-text-primary); }
.key-takeaway { background: linear-gradient(135deg, rgba(37,99,235,0.06), rgba(124,58,237,0.04)); border: 1px solid rgba(37,99,235,0.12); border-radius: var(--ec-radius-lg); padding: 28px 32px; margin: 36px 0; }
.key-takeaway h4 { font-size: 0.9rem; font-weight: 700; color: var(--ec-accent); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.05em; }

.article-cta { background: linear-gradient(160deg, var(--ec-black), var(--ec-dark)); border-radius: var(--ec-radius-xl); padding: 56px 48px; text-align: center; margin: 48px 0; position: relative; overflow: hidden; }
.article-cta::after { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 500px; height: 500px; background: radial-gradient(circle, rgba(37,99,235,0.1) 0%, rgba(124,58,237,0.05) 40%, transparent 60%); border-radius: 50%; pointer-events: none; }
.article-cta h2 { color: var(--ec-white); margin-top: 0; margin-bottom: 12px; }
.article-cta p { color: var(--ec-text-on-dark-muted); max-width: 500px; margin: 0 auto 28px; }
.article-cta .btn { display: inline-block; padding: 16px 36px; background: var(--ec-accent); color: var(--ec-white); border-radius: var(--ec-radius-pill); font-weight: 600; font-size: 1rem; position: relative; z-index: 1; transition: background 0.3s, transform 0.2s; }
.article-cta .btn:hover { background: var(--ec-accent-dark); transform: translateY(-2px); }

.footer { background: var(--ec-black); padding: 48px 0 24px; border-top: 1px solid rgba(255,255,255,0.08); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer .logo { font-weight: 700; font-size: 1.4rem; color: var(--ec-white); display: inline-block; }
.footer .logo span { color: var(--ec-accent-light); }
.footer-desc { font-size: 0.9rem; color: var(--ec-text-on-dark-muted); line-height: 1.6; max-width: 280px; margin-top: 12px; }
.footer h5 { color: var(--ec-white); font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.05em; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 0.9rem; color: var(--ec-text-on-dark-muted); transition: color 0.2s; }
.footer ul li a:hover { color: var(--ec-accent-light); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; }
.footer-bottom p { font-size: 0.8rem; color: var(--ec-text-on-dark-muted); margin-bottom: 0; }
.footer-socials { display: flex; gap: 16px; }
.footer-socials a { color: var(--ec-text-on-dark-muted); font-size: 1.1rem; transition: color 0.2s; }
.footer-socials a:hover { color: var(--ec-accent-light); }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } .footer-bottom { flex-direction: column; gap: 12px; text-align: center; } }

@media (max-width: 768px) {
  .article-hero { padding: 110px 0 0; }
  .article-hero-cover { height: 260px; }
  .article-hero-cover .blog-img-icon { font-size: 3.5rem; }
  .article-hero-cover::after { width: 200px; height: 200px; top: -40px; right: -40px; }
  .article-content { padding: 40px 20px 60px; }
  .article-content h2 { font-size: 1.35rem; margin-top: 36px; }
  .article-content h3 { font-size: 1.15rem; margin-top: 28px; }
  .key-takeaway { padding: 22px 20px; }
  .article-cta { padding: 40px 24px; }
  .article-cta h2 { font-size: 1.35rem; }
  .article-cta .btn { padding: 14px 28px; font-size: 0.9rem; }
  .container { padding: 0 16px; }
}
@media (max-width: 480px) {
  .article-hero { padding: 96px 0 0; }
  .article-hero-cover { height: 200px; }
  .article-hero-cover .blog-img-icon { font-size: 2.5rem; }
  .article-hero h1 { font-size: 1.5rem; }
  .article-meta { flex-wrap: wrap; gap: 8px; }
  .article-content { padding: 32px 16px 48px; }
  .article-content p { font-size: 0.98rem; }
  .article-cta { padding: 32px 18px; }
  .footer { padding: 36px 0 20px; }
}