/* Reset & base */
*{box-sizing:border-box}
html:focus-within{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,sans-serif;line-height:1.5;background:var(--bg);color:var(--fg)}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:root{
  --bg:#0b0f14;--fg:#e6edf3;--muted:#9fb1c3;--card:#111827;--border:#1f2937;
  --accent:#7dd3fc;--accent-strong:#38bdf8;--shadow:0 10px 30px rgba(0,0,0,.35)
}
.light{
  --bg:#ffffff;--fg:#0b1220;--muted:#4b5563;--card:#f3f4f6;--border:#e5e7eb;
  --accent:#2563eb;--accent-strong:#1d4ed8;--shadow:0 10px 30px rgba(0,0,0,.08)
}
/* Layout */
.site-header{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:rgba(17,24,39,.7);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.brand{display:flex;gap:10px;align-items:center;font-weight:700}
.logo{width:36px;height:36px;border-radius:10px;box-shadow:var(--shadow)}
.nav{display:flex;gap:18px;align-items:center}
.nav a{opacity:.9}
.nav a:hover{opacity:1}
.nav-toggle{display:none;background:none;border:1px solid var(--border);border-radius:10px;padding:6px 10px}
.mode-toggle{background:none;border:1px solid var(--border);border-radius:10px;padding:6px 10px;margin-left:10px}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center;padding:48px 20px 24px;max-width:1060px;margin:0 auto}
.hero-text h1{font-size:clamp(28px,4vw,46px);margin:0 0 8px}
.accent{color:var(--accent-strong)}
.meta{display:flex;gap:14px;flex-wrap:wrap;padding-left:0;list-style:none;color:var(--muted)}
.hero-img{border-radius:20px;box-shadow:var(--shadow)}
.section{padding:40px 20px;max-width:1060px;margin:0 auto}
.section-title{font-size:clamp(22px,3vw,34px);margin:0 0 18px}
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;padding:0;list-style:none}
.skills-grid li{background:var(--card);border:1px solid var(--border);padding:12px 14px;border-radius:14px;text-align:center}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.card-body{padding:14px 16px;display:flex;flex-direction:column;gap:8px}
.card-actions{margin-top:auto}
.center{display:flex;justify-content:center;margin-top:16px}
.site-footer{border-top:1px solid var(--border);padding:18px 20px;color:var(--muted);text-align:center}
/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);padding:10px 14px;border-radius:12px}
.btn.small{padding:8px 12px;font-size:.95rem}
.btn.primary{background:var(--accent);border-color:transparent;color:#051423;font-weight:600}
.btn.ghost{background:transparent}
.btn:hover{transform:translateY(-1px)}
/* About */
.about{display:grid;grid-template-columns:140px 1fr;gap:18px;align-items:start}
.about-img{border-radius:14px;box-shadow:var(--shadow)}
/* Reveal scroll effect */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}
/* Responsive */
@media (max-width: 860px){
  .hero{grid-template-columns:1fr}
  .nav{position:fixed;inset:56px 0 auto 0;background:var(--bg);padding:14px 18px;display:none;border-bottom:1px solid var(--border)}
  .nav.show{display:flex;flex-direction:column}
  .nav-toggle{display:block}
}

.contact-form {
  background: var(--card);
  padding: 20px;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: grid;
  gap: 14px;
  max-width: 560px;
  margin: 0 auto;
}
.contact-form label {
  display: flex;
  flex-direction: column;
  font-weight: 600;
  gap: 4px;
}
.contact-form input, .contact-form textarea {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 1rem;
  background: var(--bg);
  color: var(--fg);
}
.contact-form input:focus, .contact-form textarea:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px rgba(125,211,252,.3);
}
.contact-form button {
  justify-self: start;
}
.form-hint {
  font-size: .85rem;
  color: var(--muted);
}

.tech-stack { margin-top: 20px; }
.tech-icons { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.tech-icon { width: 40px; height: auto; filter: drop-shadow(0 1px 2px rgba(0,0,0,0.4)); }
.project-hero { border-radius: 12px; box-shadow: var(--shadow); margin-bottom: 20px; }


/* --- Enhanced contact form --- */
.contact-form{background:var(--card);border:1px solid var(--border);padding:20px;border-radius:16px;max-width:760px;margin:0 auto;box-shadow:var(--shadow);display:grid;gap:12px}
.contact-form label{display:grid;gap:6px;font-weight:600}
.contact-form input,.contact-form textarea{background:transparent;border:1px solid var(--border);color:var(--fg);padding:10px 12px;border-radius:10px}
.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--accent);border-color:transparent}
.form-hint{color:var(--muted);margin:6px 0 0}
@media(min-width:840px){
  .contact-form{grid-template-columns:1fr 1fr}
  .contact-form label:nth-child(3){grid-column:1 / -1}
  .contact-form button{justify-self:start}
}
/* Project pages */
.back-link{display:inline-block;margin-bottom:8px;opacity:.8}
.project-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;margin-bottom:20px}
.project-summary{background:var(--card);border:1px solid var(--border);padding:14px;border-radius:14px}
.project-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.project-card{background:var(--card);border:1px solid var(--border);padding:14px;border-radius:14px}
.badges{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:8px 0 0}
.badge{display:flex;align-items:center;gap:8px;background:rgba(125,211,252,.12);border:1px solid var(--border);padding:6px 10px;border-radius:999px}
.badge img{width:18px;height:18px}
@media(max-width:860px){.project-hero{grid-template-columns:1fr}}


/* Skill icons styling */
.skill-icon{width:24px;height:24px;margin-right:8px;vertical-align:middle}
#skills li{display:flex;align-items:center;gap:8px;justify-content:center;background:var(--card);border:1px solid var(--border);padding:10px;border-radius:12px}


/* --- Skill logos under text --- */
.skill-item{display:flex;flex-direction:column;align-items:center;gap:10px}
.skill-text{font-weight:700}
.skill-logos{display:flex;gap:10px;align-items:center;justify-content:center;flex-wrap:wrap}
.skill-logos img,.skill-logos svg{width:42px;height:42px;filter:grayscale(.1);opacity:.95;transition:transform .2s ease, filter .2s ease, opacity .2s ease}
.skill-logos img:hover,.skill-logos svg:hover{transform:translateY(-2px);filter:none;opacity:1}


/* Equal height cards & consistent media ratio */
.cards{align-items:stretch}
.card{height:100%}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.card-body{min-height:180px;display:flex;flex-direction:column;gap:8px}

.about-details{margin-top:14px;background:var(--card);border:1px solid var(--border);padding:14px;border-radius:14px}
.about-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px}

.steckbrief{margin-top:20px;padding:14px;background:var(--card);border:1px solid var(--border);border-radius:14px}
.steckbrief-table{width:100%;border-collapse:collapse}
.steckbrief-table td{padding:6px 8px;border-bottom:1px solid var(--border)}
.steckbrief-table tr:last-child td{border-bottom:none}
.steckbrief-table td:first-child{font-weight:bold;width:150px}