/* business-clean — modern SaaS landing meets blog. Blue accent, sticky nav. */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: var(--fs-base, 16px); }
body { margin: 0; font-family: var(--f-body, 'Inter', system-ui, sans-serif); background: var(--c-bg, #FFFFFF); color: var(--c-text, #0F172A); line-height: var(--lh, 1.65); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; border-radius: 8px; }
a { color: var(--c-accent, #2563EB); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }
code, pre { font-family: var(--f-code); }
pre { background: #F1F5F9; padding: 1rem 1.25rem; overflow-x: auto; border-radius: 8px; border: 1px solid #E2E8F0; }
code { background: #EFF6FF; color: #1D4ED8; padding: 0.1em 0.4em; border-radius: 4px; font-size: 0.9em; }
.container { max-width: var(--max-w, 800px); margin: 0 auto; padding: 0 1.5rem; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); border-bottom: 1px solid #E2E8F0; padding: 1rem 0; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.brand { font-family: var(--f-heading); font-weight: 800; font-size: 1.3rem; letter-spacing: -0.02em; color: var(--c-primary, #0F172A); }
.tagline { display: none; }
.primary-nav { display: flex; gap: 1.5rem; align-items: center; }
.primary-nav a { color: var(--c-text); font-weight: 500; font-size: 0.95rem; }
.primary-nav a:hover { color: var(--c-accent); }
.primary-nav a:last-child { background: var(--c-accent, #2563EB); color: white; padding: 0.5rem 1.25rem; border-radius: 8px; }
.primary-nav a:last-child:hover { background: #1D4ED8; text-decoration: none; }
.site-main { padding: 3rem 0 5rem; background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 200px); }
.page-title { font-family: var(--f-heading); font-size: 2.25rem; font-weight: 800; margin: 0 0 0.5rem; letter-spacing: -0.02em; color: var(--c-primary); }
.posts { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: 1.25rem; }
.post-card { background: white; border: 1px solid #E2E8F0; border-radius: 12px; padding: 1.5rem; transition: all 0.15s; }
.post-card:hover { border-color: var(--c-accent, #2563EB); box-shadow: 0 10px 30px -10px rgba(37, 99, 235, 0.15); }
.post-card .cover img { margin-bottom: 1rem; }
.post-card h2 { font-family: var(--f-heading); font-size: 1.35rem; font-weight: 700; margin: 0.5rem 0; letter-spacing: -0.01em; }
.post-card h2 a { color: var(--c-primary); }
.post-card .meta { color: var(--c-muted, #64748B); font-size: 0.85rem; }
.post-card .excerpt { color: var(--c-muted); margin: 0.5rem 0 0.75rem; }
.read-more { color: var(--c-accent, #2563EB); font-weight: 600; font-size: 0.95rem; }
.post-single .post-header h1 { font-family: var(--f-heading); font-size: 2.5rem; font-weight: 800; margin: 0 0 0.75rem; letter-spacing: -0.025em; line-height: 1.15; color: var(--c-primary); }
.post-single .meta { color: var(--c-muted); font-size: 0.9rem; }
.post-single .cover { margin: 2rem 0; }
.post-body h2 { font-family: var(--f-heading); color: var(--c-primary); margin-top: 2.5rem; font-size: 1.75rem; font-weight: 700; letter-spacing: -0.01em; }
.post-body h3 { font-family: var(--f-heading); color: var(--c-primary); margin-top: 2rem; font-weight: 700; }
.post-body p { margin: 1rem 0; }
.post-body blockquote { background: #EFF6FF; border-left: 4px solid var(--c-accent, #2563EB); padding: 1rem 1.25rem; border-radius: 0 8px 8px 0; color: var(--c-primary); margin: 1.5rem 0; }
.post-body table { width: 100%; border-collapse: collapse; margin: 1rem 0; border-radius: 8px; overflow: hidden; }
.post-body th { background: #F1F5F9; padding: 0.75rem 1rem; text-align: left; font-weight: 600; }
.post-body td { padding: 0.75rem 1rem; border-top: 1px solid #E2E8F0; }
.post-footer { margin-top: 3rem; padding: 2rem; background: linear-gradient(135deg, var(--c-accent, #2563EB) 0%, #1D4ED8 100%); border-radius: 12px; color: white; }
.post-footer a { color: white; text-decoration: underline; }
.error-page { text-align: center; padding: 5rem 0; }
.error-page h1 { font-family: var(--f-heading); font-size: 3rem; font-weight: 800; color: var(--c-primary); }
.site-footer { border-top: 1px solid #E2E8F0; padding: 2.5rem 0; color: var(--c-muted); font-size: 0.9rem; background: #F8FAFC; }
.empty { color: var(--c-muted); }