/* Projekteinkauf‑Wissen.de — Helles, freundliches Layout */
:root{
  --bg:#ffffff;
  --panel:#f8fafc;        /* slate-50 */
  --text:#0f172a;         /* slate-900 */
  --muted:#475569;        /* slate-600 */
  --brand:#2563eb;        /* blue-600 */
  --brand-2:#10b981;      /* emerald-500 */
  --link:#2563eb;         /* blue-600 */
  --border:#e5e7eb;       /* gray-200 */
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";line-height:1.6}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1000px;margin:0 auto;padding:0 16px}

/* Header */
.site-header{position:sticky;top:0;background:#fff;backdrop-filter:saturate(1.1) blur(6px);border-bottom:1px solid var(--border);z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.header-left{display:flex;align-items:center;gap:10px}
.logo img{display:block;width:28px;height:28px}
.brand{font-weight:700;letter-spacing:.2px;color:var(--text)}
.nav-toggle{display:none;background:transparent;border:1px solid var(--border);color:var(--text);padding:6px 10px;border-radius:8px}
.site-nav{display:flex;gap:18px}
.site-nav a{padding:8px 10px;border-radius:8px;color:var(--text)}
.site-nav a[aria-current="page"]{background:rgba(37,99,235,.08);}

@media (max-width: 720px){
  .nav-toggle{display:inline-block}
  .site-nav{display:none;flex-direction:column;position:absolute;top:64px;right:16px;background:#fff;padding:12px;border:1px solid var(--border);border-radius:10px;box-shadow:0 10px 30px rgba(2,8,23,.08)}
  .site-nav.open{display:flex}
}

/* Hero */
.hero{padding:72px 0 48px;background:radial-gradient(1000px 400px at 10% -20%, rgba(37,99,235,.08), transparent),radial-gradient(700px 300px at 90% -10%, rgba(16,185,129,.08), transparent)}
.hero h1{font-size:clamp(28px,5vw,44px);line-height:1.2;margin:0 0 10px}
.hero p{max-width:800px;color:var(--muted);margin:0 0 18px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:10px 14px;border:1px solid var(--border);border-radius:10px;color:var(--text);background:#fff}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border:0;font-weight:600}
.text-link{color:var(--link)}

/* Features */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:28px 16px 54px}
.feature{border:1px solid var(--border);border-radius:14px;padding:18px;background:#fff;box-shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.1)}
.feature h2{margin:6px 0 6px;font-size:20px}
.feature p{color:var(--muted);margin:0 0 8px}
@media (max-width: 900px){.features{grid-template-columns:1fr}}

/* Prose */
.prose{padding:28px 0 56px}
.prose h1{font-size:32px;margin:8px 0 12px}
.prose h2{margin:28px 0 6px;font-size:22px}
.prose h3{margin:18px 0 6px;font-size:18px}
.prose p{color:#334155}
.prose ul, .prose ol{padding-left:20px}
.prose pre{background:#f1f5f9;border:1px solid var(--border);border-radius:10px;padding:12px;overflow:auto}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#0f172a}

/* Footer */
.site-footer{border-top:1px solid var(--border);background:#fff}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.footer-nav{display:flex;gap:16px}

/* Tools */
.tools{padding:8px 0 24px}
.tools h2{margin:6px 0 12px}
.tools-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width: 900px){.tools-grid{grid-template-columns:1fr}}
.tool-card{border:1px solid var(--border);border-radius:14px;padding:18px;background:#fff;box-shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.1)}
.tool-card h3{margin:0 0 6px;font-size:18px}
.tool-card .muted{color:var(--muted);margin:0 0 12px}
.field{display:flex;flex-direction:column;gap:6px;margin:0 0 10px}
.field label{font-weight:600;font-size:14px}
.field input,.field textarea,.field select{padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--text);font:inherit}
.result{margin-top:12px;border:1px solid var(--border);border-radius:12px;padding:12px;background:#fff}
.result h4{margin:6px 0 6px}
.result p{margin:0 0 8px}
.result ul{margin:0 0 8px;padding-left:18px}
.result-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.btn[disabled]{opacity:.5;cursor:not-allowed}