/* styles.css — Mobile‑first CSS for webappteam.de
   - Minimal, accessible, and easy to extend
   - Breakpoints at 640px (sm), 960px (md), 1280px (lg)
*/
:root {
  --bg: #FFFEF6;
  --text: #0a0a0a;
  --muted: #666;
  --brand: #2E7D32;       /* teal-ish */
  --brand-600: #6FBF44;
  --surface: #f6f7f8;
  --border: #e5e7eb;
  --radius: 16px;
  --shadow: 0 2px 10px rgba(0,0,0,0.06);
  --maxw: 1100px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, sans-serif; color: var(--text); background: var(--bg); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }

/* Header / Nav */
.header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.9); backdrop-filter: blur(6px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; gap: 12px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--text); }
.brand-logo { width: 34px; height: 34px; border-radius: 12px; background: var(--text); box-shadow: var(--shadow); }

.nav-toggle { border: 1px solid var(--border); background: #fff; padding: 8px 10px; border-radius: 10px; display: inline-flex; align-items: center; gap: 8px; }
.nav-toggle:focus { outline: 2px solid var(--brand-600); outline-offset: 2px; }
.nav { display: none; }
.nav a { display: block; padding: 10px 0; color: #111; font-weight: 600; }
.nav a.active { color: var(--brand-600); }
.nav-cta { margin-top: 8px; }

/* Mobile menu open */
.nav.open { display: block; padding-bottom: 10px; }

/* CTA button */
.btn { display: inline-flex; align-items: center; gap: 10px; border-radius: 999px; padding: 10px 14px; border: 1px solid var(--border); font-weight: 700; background: #fff; box-shadow: var(--shadow); }
.btn:hover { border-color: #cbd5e1; text-decoration: none; }
.btn.primary { background: var(--brand); color: #fff; border-color: transparent; }
.btn.primary:hover { background: var(--brand-600); }

/* Hero */
.hero { padding: 36px 0 24px; }
.hero h1 { font-size: 28px; line-height: 1.2; margin: 0 0 10px; letter-spacing: -0.02em; }
.hero p.lead { color: var(--muted); font-size: 16px; margin: 0 0 18px; }
.hero .tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { padding: 6px 10px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); font-size: 12px; color: #333; }

/* Cards */
.grid { display: grid; gap: 16px; }
.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.card h3 { margin: 0 0 10px; font-size: 18px; }
.card p { margin: 0; color: #333; }
.card ul { margin: 10px 0 0 18px; padding: 0; }
.card li { margin: 6px 0; }

/* Sections */
.section { padding: 28px 0; }
.section h2 { font-size: 22px; margin: 0 0 12px; }
.section .sub { color: var(--muted); margin-bottom: 16px; }

/* Footer */
.footer { margin-top: 32px; border-top: 1px solid var(--border); background: #fff; }
.footer-inner { padding: 18px 0; display: grid; gap: 10px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 14px; }
.footer small { color: var(--muted); }

/* Tables (for Impressum) */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { text-align: left; border-bottom: 1px solid var(--border); padding: 8px 6px; }
.table th { background: var(--surface); }

/* Forms */
.form { display: grid; gap: 12px; }
.input { width: 100%; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--border); }
.textarea { width: 100%; min-height: 120px; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--border); }
label { font-weight: 600; }

/* Utilities */
.muted { color: var(--muted); }
.center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }

/* Responsive */
@media (min-width: 640px) {
  .hero { padding: 56px 0 30px; }
  .hero h1 { font-size: 40px; }
  .hero p.lead { font-size: 18px; }
  .grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
  .nav { display: flex; gap: 18px; align-items: center; }
  .nav.open { display: flex; }
  .nav-cta { margin-top: 0; margin-left: 8px; }
  .nav-toggle { display: none; }
  .footer-inner { grid-template-columns: 1fr auto; align-items: center; }
}
@media (min-width: 960px) {
  .hero h1 { font-size: 48px; }
}