:root {
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --bg: #faf9fb;
  --surface: #fff;
  --text: #1a1a2e;
  --text-secondary: #6c7080;
  --primary: #5a189a;
  --primary-dark: #4a1477;
  --accent: #00bfa6;
  --radius: 20px;
  --shadow: 0 8px 30px rgba(26,26,46,0.06);
  --shadow-hover: 0 16px 40px rgba(26,26,46,0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; }

/* Mobile-first base */
.container { width: 92%; max-width: 1100px; margin: 0 auto; padding: 1.5rem 0; }

/* Marketing nav */
.site-nav { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.9); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(0,0,0,0.05); padding: 1rem 4vw; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.site-nav .logo { font-weight: 800; font-size: 1.3rem; letter-spacing: -0.03em; color: var(--text); text-decoration: none; }
.site-nav .logo span { color: var(--primary); }
.site-nav ul { display: flex; gap: .5rem; list-style: none; flex-wrap: wrap; justify-content: flex-end; }
.site-nav a { padding: .4rem .85rem; border-radius: 8px; font-weight: 600; font-size: .85rem; color: var(--text-secondary); text-decoration: none; transition: .15s; }
.site-nav a:hover, .site-nav a.active { color: var(--primary); background: rgba(90,24,154,0.06); }

/* Hero */
.hero { padding: 6rem 4vw 4rem; text-align: center; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.1; max-width: 800px; margin: 0 auto 1rem; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: clamp(1rem, 2vw, 1.15rem); color: var(--text-secondary); max-width: 580px; margin: 0 auto 2rem; }
.hero .cta-row { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: .35rem; padding: .75rem 1.5rem; border-radius: 12px; font-weight: 700; font-size: .95rem; border: none; cursor: pointer; transition: .2s; text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(90,24,154,0.25); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(90,24,154,0.3); }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid #e8e9ef; }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }

/* Cards */
.card { background: var(--surface); border: 1px solid rgba(0,0,0,0.04); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); transition: .2s; }
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: .5rem; letter-spacing: -0.02em; }
.card p { color: var(--text-secondary); font-size: .95rem; }

/* Grid */
.grid-auto { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

/* Sections */
.section { padding: 4rem 0; border-top: 1px solid rgba(0,0,0,0.05); }
.section h2 { font-size: clamp(1.6rem, 4vw, 2.2rem); font-weight: 800; letter-spacing: -0.03em; text-align: center; margin-bottom: .5rem; }
.section .subtitle { text-align: center; color: var(--text-secondary); max-width: 520px; margin: 0 auto 2.5rem; }

/* Feature list */
.feature-grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.feature-item { display: flex; gap: 1rem; align-items: flex-start; }
.feature-item .icon { width: 44px; height: 44px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; flex-shrink: 0; }

/* Install / Signup form */
.form-card { max-width: 480px; margin: 0 auto; background: var(--surface); border: 1px solid rgba(0,0,0,0.05); border-radius: var(--radius); padding: 2.5rem; box-shadow: var(--shadow); }
.form-card h3 { margin-bottom: .25rem; }
.form-card p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: .9rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: .78rem; font-weight: 700; color: var(--text-secondary); margin-bottom: .35rem; text-transform: uppercase; letter-spacing: .04em; }
.form-group input, .form-group select { width: 100%; padding: .75rem 1rem; border: 1px solid #ddd; border-radius: 10px; font-family: inherit; font-size: 1rem; background: #fff; transition: .15s; }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(90,24,154,0.08); }

/* Blog */
.blog-grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.blog-card { background: var(--surface); border: 1px solid rgba(0,0,0,0.04); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: .2s; text-decoration: none; color: inherit; display: block; }
.blog-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.blog-card img { width: 100%; height: 180px; object-fit: cover; display: block; }
.blog-card .content { padding: 1.25rem; }
.blog-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: .25rem; }
.blog-card p { font-size: .85rem; color: var(--text-secondary); }

/* Mobile nav */
@media (max-width: 640px) {
  .site-nav { padding: .75rem 1rem; flex-wrap: wrap; gap: .5rem; }
  .site-nav ul { justify-content: center; width: 100%; gap: .35rem; }
  .hero { padding: 4rem 1rem 2.5rem; }
  .section { padding: 3rem 0; }
  .form-card { padding: 1.5rem; }
}

/* Footer */
.site-footer { text-align: center; padding: 2.5rem 1rem; color: var(--text-secondary); font-size: .85rem; border-top: 1px solid rgba(0,0,0,0.05); margin-top: 2rem; }