/* ── Tokens ──────────────────────────────────────────────── */
:root {
    --bg:           #07101d;
    --surface:      #0d1828;
    --surface-2:    #132033;
    --border:       #1c2f47;
    --border-hover: #2a4463;
    --text:         #e2e8f0;
    --muted:        #5d7a99;
    --accent:       #22d3ee;
    --accent-dim:   rgba(34, 211, 238, 0.08);
    --accent2:      #818cf8;
    --radius:       10px;
    --nav-h:        60px;
}

/* ── Skip Link ───────────────────────────────────────────── */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    background: var(--accent);
    color: var(--bg);
    padding: 0.5rem 1.1rem;
    border-radius: 0 0 8px 8px;
    font-weight: 700;
    font-size: 0.875rem;
    text-decoration: none;
    z-index: 9999;
    transition: top 0.15s;
}
.skip-link:focus { top: 0; }

/* ── Reset / Base ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Lato', system-ui, -apple-system, sans-serif;
    font-weight: 400;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

body.modal-open { overflow: hidden; }

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }

/* ── Container ───────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ── Navbar ──────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    z-index: 200;
    background: rgba(7, 16, 29, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 0.3px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-link {
    color: var(--muted);
    font-size: 0.875rem;
    padding: 0.4rem 0.9rem;
    border-radius: 6px;
    text-decoration: none;
    transition: color 0.18s, background 0.18s;
    display: block;
}

.nav-link:hover { color: var(--text); background: rgba(255,255,255,0.06); }
.nav-link.is-active { color: var(--accent); }

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.4rem;
    cursor: pointer;
    color: var(--muted);
    align-items: center;
    justify-content: center;
    transition: border-color 0.18s, color 0.18s;
}

.nav-toggle:hover { border-color: var(--border-hover); color: var(--text); }

@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .nav-list {
        display: none;
        position: absolute;
        top: var(--nav-h);
        left: 0; right: 0;
        background: rgba(7, 16, 29, 0.97);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: stretch;
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--border);
        gap: 0.2rem;
    }

    .nav-list.is-open { display: flex; }
}

/* ── Hero ────────────────────────────────────────────────── */
#about {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--nav-h) + 4rem) 1.5rem 5rem;
    position: relative;
    overflow: hidden;
    background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.025) 1px, transparent 0);
    background-size: 28px 28px;
}

#about::before,
#about::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

#about::before {
    width: 600px; height: 600px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 65%);
    opacity: 0.06;
    top: -180px; right: -160px;
}

#about::after {
    width: 480px; height: 480px;
    background: radial-gradient(circle, var(--accent2) 0%, transparent 65%);
    opacity: 0.07;
    bottom: -100px; left: -140px;
}

.hero-inner { position: relative; z-index: 1; max-width: 560px; }

/* Avatar */
.avatar-wrap { display: inline-block; margin-bottom: 2rem; }

@keyframes ring-glow {
    0%, 100% { box-shadow: 0 0 0 0px rgba(34, 211, 238, 0.25); }
    50%       { box-shadow: 0 0 0 8px  rgba(34, 211, 238, 0); }
}

.avatar-ring {
    width: 156px;
    height: 156px;
    border-radius: 50%;
    padding: 2.5px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: inline-flex;
    animation: ring-glow 3.5s ease-in-out infinite;
}

.avatar-bg {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-size: cover;
    background-position: center top;
    background-color: var(--surface);
}

/* Hero text */
.hero-eyebrow {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.7rem;
}

.hero-name {
    font-size: clamp(2.2rem, 6vw, 3.6rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--text);
    margin-bottom: 0.7rem;
}

.hero-role {
    font-size: 1.05rem;
    color: var(--muted);
    margin-bottom: 1.1rem;
}

.hero-bio {
    font-size: 0.95rem;
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 2.25rem;
}

/* CTA */
.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.65rem;
    background: transparent;
    color: var(--accent);
    border: 1.5px solid var(--accent);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    text-decoration: none;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-cta:hover {
    background: var(--accent-dim);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(34, 211, 238, 0.15);
}

/* ── Section shared ──────────────────────────────────────── */
section { padding: 5.5rem 0; }

.section-eyebrow {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.55rem;
}

.section-title {
    font-size: clamp(1.55rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.65rem;
}

.section-bar {
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    border-radius: 2px;
    margin-bottom: 3rem;
}

/* ── Techstack ───────────────────────────────────────────── */
#techstack {
    background: var(--surface);
    position: relative;
}

#techstack::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-hover), transparent);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

@media (max-width: 900px) { .tech-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .tech-grid { grid-template-columns: 1fr; } }

.tech-category-card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem 1.4rem 1.3rem;
    position: relative;
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.tech-category-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent2), transparent);
}

.tech-category-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 32px rgba(34, 211, 238, 0.06);
}

.category-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.category-name {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 3.5px;
    text-transform: uppercase;
    color: var(--accent);
}

.category-count {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--muted);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.1rem 0.55rem;
}

.category-divider { height: 1px; background: var(--border); flex-shrink: 0; }

.tag-group { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; }

.tech-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.28rem 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--text);
    cursor: default;
    white-space: nowrap;
    transition: border-color 0.18s, color 0.18s, background 0.18s;
}

.tech-tag:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
}

.tech-loading { color: var(--muted); font-size: 0.875rem; }

/* ── Footer ──────────────────────────────────────────────── */
footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: 2.5rem 1.5rem;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--muted);
    font-size: 0.825rem;
    cursor: pointer;
    background: none;
    border: none;
    font-family: inherit;
    padding: 0;
    transition: color 0.18s;
}

.footer-link:hover { color: var(--text); }

.footer-copy { color: var(--muted); font-size: 0.775rem; }

/* ── Modals ──────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s, visibility 0.22s;
}

.modal-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.modal-box {
    background: var(--surface);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius);
    overflow: hidden;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    position: relative;
    transform: translateY(14px);
    transition: transform 0.22s ease;
}

.modal-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent2), transparent);
    z-index: 1;
}

.modal-overlay.is-open .modal-box { transform: translateY(0); }

.modal-box--lg { max-width: 680px; }

.modal-head {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1.15rem 1.4rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-shrink: 0;
}

.modal-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--muted);
    padding: 0.25rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    transition: color 0.18s, background 0.18s;
    flex-shrink: 0;
}

.modal-close:hover { color: var(--text); background: rgba(255,255,255,0.06); }

.modal-body {
    background: var(--surface);
    padding: 1.5rem 1.4rem;
    overflow-y: auto;
    flex: 1;
}

.modal-foot {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 0.875rem 1.4rem;
    flex-shrink: 0;
}

.btn-secondary {
    background: var(--surface-2);
    border: 1px solid var(--border-hover);
    border-radius: 6px;
    color: var(--text);
    font-family: inherit;
    font-size: 0.825rem;
    font-weight: 700;
    padding: 0.45rem 1.1rem;
    cursor: pointer;
    transition: background 0.18s, border-color 0.18s;
}

.btn-secondary:hover { background: var(--border); border-color: var(--muted); }

/* ── Impressum content ───────────────────────────────────── */
.legal-eyebrow {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 3.5px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.1rem;
}

.legal-eyebrow + .legal-eyebrow,
.legal-card + .legal-eyebrow {
    margin-top: 1.5rem;
}

.legal-card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1.25rem;
}

.legal-row {
    display: grid;
    grid-template-columns: 88px 1fr;
    gap: 1rem;
    padding: 0.85rem 1.15rem;
    align-items: start;
}

.legal-row + .legal-row { border-top: 1px solid var(--border); }

.legal-label {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--muted);
    padding-top: 2px;
}

.legal-value { font-size: 0.85rem; color: var(--text); line-height: 1.65; }
.legal-value a { color: var(--accent); text-decoration: none; }
.legal-value a:hover { text-decoration: underline; }

.legal-prose {
    font-size: 0.825rem;
    color: var(--muted);
    line-height: 1.75;
}

.legal-prose a { color: var(--accent); }

/* ── Datenschutz content ─────────────────────────────────── */
.ds-section {
    display: flex;
    gap: 1.1rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border);
}

.ds-section:first-child { padding-top: 0; }
.ds-section:last-child  { border-bottom: none; padding-bottom: 0; }

.ds-num {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--border-hover);
    line-height: 1;
    min-width: 2rem;
    padding-top: 1px;
    flex-shrink: 0;
}

.ds-title { font-size: 0.825rem; font-weight: 700; color: var(--text); margin-bottom: 0.4rem; }

.ds-body { font-size: 0.825rem; color: var(--muted); line-height: 1.75; }
.ds-body a { color: var(--accent); word-break: break-all; }

/* ── Animations ──────────────────────────────────────────── */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.fu   { animation: fade-up 0.6s ease both; }
.fu-1 { animation-delay: 0.05s; }
.fu-2 { animation-delay: 0.15s; }
.fu-3 { animation-delay: 0.25s; }
.fu-4 { animation-delay: 0.35s; }
.fu-5 { animation-delay: 0.45s; }