/**
 * Infinity Labs – Hauptstylesheet
 *
 * Exakt nach dem Referenz-Layout aufgebaut.
 * Fonts: IBM Plex Mono (monospace), Syne (sans-serif)
 * Theme: Dark (--bg: #080c10)
 *
 * @package  InfinityLabs
 * @author   Peer
 * @version  0.1.0
 * @since    2025-01-01
 */

/* ── WEBFONTS (lokal) ────────────────────────────────────────── */
@font-face {
    font-family: 'IBM Plex Mono';
    src: url('/fonts/IBMPlexMono-Light.woff2') format('woff2');
    font-weight: 300;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    src: url('/fonts/IBMPlexMono-LightItalic.woff2') format('woff2');
    font-weight: 300;
    font-style: italic;
    font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    src: url('/fonts/IBMPlexMono-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'IBM Plex Mono';
    src: url('/fonts/IBMPlexMono-SemiBold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Syne';
    src: url('/fonts/Syne-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Syne';
    src: url('/fonts/Syne-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Syne';
    src: url('/fonts/Syne-ExtraBold.woff2') format('woff2');
    font-weight: 800;
    font-style: normal;
    font-display: swap;
}

/* ── RESET & VARIABLEN ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg:        #080c10;
    --bg-card:   #0d1117;
    --bg-glass:  rgba(255,255,255,0.03);
    --border:    rgba(255,255,255,0.07);
    --border-hi: rgba(99,179,237,0.35);
    --accent:    #63b3ed;
    --accent2:   #38bdf8;
    --green:     #4ade80;
    --muted:     #758496;
    --text:      #e2e8f0;
    --text-dim:  #8494a7;
    --mono:      'IBM Plex Mono', monospace;
    --sans:      'Syne', sans-serif;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--mono);
    font-size: 14px;
    line-height: 1.7;
    overflow-x: hidden;
}

/* ── SKIP-LINK (Barrierefreiheit) ─────────────────────────────── */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 200;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: var(--bg);
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 0 0 4px 4px;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 0;
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ── NOISE OVERLAY ───────────────────────────────────────────── */
body::before {
    content: '';
    position: fixed; inset: 0; z-index: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    background-size: 200px;
    pointer-events: none;
    opacity: 0.4;
}

/* ── GRID BACKGROUND ─────────────────────────────────────────── */
body::after {
    content: '';
    position: fixed; inset: 0; z-index: 0;
    background-image:
        linear-gradient(rgba(99,179,237,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99,179,237,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}

/* ── LAYOUT ──────────────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 1; }

/* ── NAV ─────────────────────────────────────────────────────── */
nav[aria-label="Hauptnavigation"] {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    border-bottom: 1px solid var(--border);
    background: rgba(8,12,16,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.nav-inner {
    max-width: 1100px; margin: 0 auto; padding: 0 2rem;
    display: flex; align-items: center; justify-content: space-between;
    height: 58px;
}
.nav-logo {
    font-family: var(--sans); font-size: 1rem; font-weight: 800;
    letter-spacing: -0.02em; color: var(--text); text-decoration: none; 
    display: flex; align-items: center; gap: 10px;
}
.nav-logo-img {
    height: 32px;
    width: auto;
}
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
    color: var(--text-dim); text-decoration: none; font-size: 12px;
    letter-spacing: 0.08em; text-transform: uppercase;
    transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a:focus { color: var(--accent); }
.nav-links a[aria-current="page"] { color: var(--accent); }
.nav-cta {
    font-size: 12px; padding: 7px 18px;
    border: 1px solid var(--accent); color: var(--accent);
    background: transparent; border-radius: 4px;
    text-decoration: none; transition: all 0.2s;
    letter-spacing: 0.05em;
}
.nav-cta:hover,
.nav-cta:focus { background: var(--accent); color: var(--bg); }

/* ── MOBILE NAV TOGGLE ───────────────────────────────────────── */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ── HERO ────────────────────────────────────────────────────── */
#hero {
    min-height: 100vh;
    display: flex; align-items: center;
    padding: 7rem 0 4rem;
    position: relative; overflow: hidden;
}
.hero-glow {
    position: absolute; top: 20%; left: 50%;
    transform: translate(-50%, -50%);
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(99,179,237,0.06) 0%, transparent 70%);
    pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--green); margin-bottom: 1.5rem;
}
.hero-eyebrow::before {
    content: ''; display: block; width: 20px; height: 1px; background: var(--green);
}
.hero-title {
    font-family: var(--sans);
    font-size: clamp(2.2rem, 4vw, 3.4rem);
    font-weight: 800; line-height: 1.1;
    letter-spacing: -0.03em; margin-bottom: 1.5rem;
}
.hero-title span { color: var(--accent); }
.hero-sub {
    color: var(--text-dim); font-size: 14px; line-height: 1.8;
    margin-bottom: 2.5rem; max-width: 440px;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn-primary {
    padding: 12px 28px; background: var(--accent); color: var(--bg);
    font-family: var(--mono); font-size: 13px; font-weight: 600;
    border: none; border-radius: 4px; text-decoration: none;
    transition: all 0.2s; letter-spacing: 0.03em; cursor: pointer;
}
.btn-primary:hover,
.btn-primary:focus { background: var(--accent2); transform: translateY(-1px); }
.btn-ghost {
    padding: 12px 28px; background: transparent; color: var(--text-dim);
    font-family: var(--mono); font-size: 13px;
    border: 1px solid var(--border); border-radius: 4px; text-decoration: none;
    transition: all 0.2s; cursor: pointer;
}
.btn-ghost:hover,
.btn-ghost:focus { border-color: var(--accent); color: var(--accent); }

/* ── CODE TERMINAL ───────────────────────────────────────────── */
.terminal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px; overflow: hidden;
    font-family: var(--mono); font-size: 12.5px;
    box-shadow: 0 24px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(99,179,237,0.05);
}
.terminal-bar {
    background: rgba(255,255,255,0.04);
    border-bottom: 1px solid var(--border);
    padding: 0 0 0 16px;
    height: 36px;
    display: flex; align-items: center; gap: 8px;
}
.terminal-title { flex: 1; color: var(--muted); font-size: 11px; }
.win-controls { display: flex; align-items: stretch; height: 100%; margin-left: auto; }
.win-btn {
    display: grid; place-items: center;
    width: 46px; height: 100%;
    font-size: 11px; color: var(--text-dim);
    transition: background 0.15s, color 0.15s;
    cursor: default; line-height: 1;
}
.win-btn:hover { background: rgba(255,255,255,0.08); }
.win-close:hover { background: #c42b1c; color: #fff; }
.terminal-body { padding: 1.4rem; line-height: 2; }
.t-comment { color: #4a5568; }
.t-keyword { color: #f472b6; }
.t-class   { color: var(--accent); }
.t-fn      { color: #a78bfa; }
.t-string  { color: var(--green); }
.t-var     { color: #fbbf24; }
.t-op      { color: var(--text-dim); }
.t-num     { color: #fb923c; }
.cursor {
    display: inline-block; width: 2px; height: 14px;
    background: var(--accent); margin-left: 2px;
    vertical-align: middle;
    animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ── SECTION ─────────────────────────────────────────────────── */
section { padding: 6rem 0; position: relative; z-index: 1; }
.section-label {
    font-size: 11px; letter-spacing: 0.15em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 0.75rem;
}
.section-title {
    font-family: var(--sans); font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 800; letter-spacing: -0.02em; margin-bottom: 1rem;
}
.section-sub { color: var(--text-dim); max-width: 560px; line-height: 1.8; }
.divider {
    height: 1px; background: var(--border); margin: 0;
}

/* ── STATS ROW ───────────────────────────────────────────────── */
.stats-row {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 0; border: 1px solid var(--border); border-radius: 8px;
    overflow: hidden; margin: 4rem 0;
}
.stat {
    padding: 1.8rem 1.5rem; text-align: center;
    border-right: 1px solid var(--border);
    background: var(--bg-glass);
}
.stat:last-child { border-right: none; }
.stat-num {
    font-family: var(--sans); font-size: 2rem; font-weight: 800;
    color: var(--accent); letter-spacing: -0.03em;
}
.stat-label { font-size: 11px; color: var(--text-dim); margin-top: 4px; letter-spacing: 0.05em; }

/* ── LEISTUNGEN ──────────────────────────────────────────────── */
.services-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 1px; background: var(--border);
    border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
    margin-top: 3rem;
}
.service-card {
    background: var(--bg-card); padding: 2rem;
    transition: background 0.3s;
    position: relative; overflow: hidden;
}
.service-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0;
    height: 2px; background: var(--accent); transform: scaleX(0);
    transform-origin: left; transition: transform 0.3s;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover { background: rgba(99,179,237,0.04); }
.service-icon {
    font-size: 1.5rem; margin-bottom: 1rem; display: block;
}
.service-num {
    font-size: 10px; color: var(--muted); letter-spacing: 0.1em;
    margin-bottom: 0.5rem; display: block;
}
.service-title {
    font-family: var(--sans); font-size: 1.05rem; font-weight: 700;
    margin-bottom: 0.75rem; color: var(--text);
}
.service-desc { color: var(--text-dim); font-size: 13px; line-height: 1.7; }
.service-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 1.2rem; }
.tag {
    font-size: 10px; padding: 3px 8px;
    border: 1px solid var(--border); border-radius: 3px;
    color: var(--text-dim); letter-spacing: 0.05em;
}

/* ── STACK ───────────────────────────────────────────────────── */
#stack { background: var(--bg-card); }
.stack-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem; margin-top: 3rem;
}
.stack-item {
    border: 1px solid var(--border); border-radius: 6px;
    padding: 1.1rem 1rem; text-align: center;
    background: var(--bg-glass); transition: all 0.2s;
}
.stack-item:hover {
    border-color: var(--border-hi);
    background: rgba(99,179,237,0.05);
    transform: translateY(-2px);
}
.stack-name { font-size: 12px; font-weight: 600; color: var(--text); }
.stack-cat { font-size: 10px; color: var(--text-dim); margin-top: 3px; }

/* ── PROCESS ─────────────────────────────────────────────────── */
.process-steps { margin-top: 3rem; }
.process-step {
    display: grid; grid-template-columns: 80px 1fr;
    gap: 2rem; padding: 2rem 0;
    border-bottom: 1px solid var(--border);
    align-items: start;
}
.process-step:last-child { border-bottom: none; }
.step-num {
    font-family: var(--sans); font-size: 3rem; font-weight: 800;
    color: var(--border); line-height: 1; text-align: right;
    padding-top: 0.2rem;
}
.step-title {
    font-family: var(--sans); font-size: 1.1rem; font-weight: 700;
    margin-bottom: 0.5rem;
}
.step-desc { color: var(--text-dim); font-size: 13px; line-height: 1.7; }

/* ── CONTACT ─────────────────────────────────────────────────── */
#kontakt { background: var(--bg-card); }
.contact-inner {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 5rem; align-items: start;
}
.contact-info h2 {
    font-family: var(--sans); font-size: 2rem; font-weight: 800;
    letter-spacing: -0.03em; margin-bottom: 1rem;
}
.contact-info p { color: var(--text-dim); line-height: 1.8; margin-bottom: 2rem; }
.contact-detail {
    display: flex; align-items: center; gap: 12px;
    padding: 1rem 0; border-top: 1px solid var(--border);
    font-size: 13px; color: var(--text-dim);
}
.contact-detail a { color: var(--accent); text-decoration: none; }
.contact-detail a:hover { text-decoration: underline; }
.detail-label { font-size: 10px; color: var(--muted); letter-spacing: 0.1em; text-transform: uppercase; min-width: 70px; }

/* ── FORM ────────────────────────────────────────────────────── */
.contact-form { display: flex; flex-direction: column; gap: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 11px; color: var(--text-dim); letter-spacing: 0.08em; text-transform: uppercase; }
.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg); border: 1px solid var(--border);
    color: var(--text); font-family: var(--mono); font-size: 13px;
    padding: 10px 14px; border-radius: 4px; outline: none;
    transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); outline: 2px solid rgba(99,179,237,0.25); outline-offset: 1px; }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select option { background: var(--bg-card); }

/* Pflichtfeld-Stern */
.required { color: var(--accent); font-weight: normal; }

/* Captcha */
.captcha-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}
.captcha-image {
    border: 1px solid var(--border);
    border-radius: 4px;
    height: 48px;
    width: auto;
}
.captcha-refresh {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 18px;
    width: 38px;
    height: 38px;
    border-radius: 4px;
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: border-color 0.2s, color 0.2s;
    flex-shrink: 0;
}
.captcha-refresh:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Honeypot – unsichtbar für Nutzer, sichtbar für Bots */
.form-honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    overflow: hidden;
}

/* Datenschutz-Checkbox */
.form-checkbox-group {
    gap: 8px;
}
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    font-size: 12px;
    text-transform: none;
    letter-spacing: normal;
    line-height: 1.6;
}
.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}
.checkbox-custom {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    border: 1px solid var(--border);
    border-radius: 3px;
    background: var(--bg);
    margin-top: 1px;
    transition: all 0.2s;
    display: grid;
    place-items: center;
}
.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
    background: var(--accent);
    border-color: var(--accent);
}
.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '';
    width: 5px;
    height: 9px;
    border: solid var(--bg);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-top: -2px;
}
.checkbox-label input[type="checkbox"]:focus-visible + .checkbox-custom {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
.checkbox-text {
    color: var(--text-dim);
}
.checkbox-text a {
    color: var(--accent);
    text-decoration: none;
}
.checkbox-text a:hover {
    text-decoration: underline;
}

/* Fehlermeldungen */
.form-error {
    font-size: 12px;
    color: #f87171;
    min-height: 0;
}
.form-error:not(:empty) {
    min-height: 1.2em;
}

/* Statusmeldung */
.form-status {
    font-size: 13px;
    padding: 0;
    border-radius: 4px;
    transition: all 0.3s;
}
.form-status.success {
    color: var(--green);
    padding: 0.75rem 1rem;
    border: 1px solid rgba(74,222,128,0.2);
    background: rgba(74,222,128,0.05);
}
.form-status.error {
    color: #f87171;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(248,113,113,0.2);
    background: rgba(248,113,113,0.05);
}

/* Fehlerhafte Felder markieren */
.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid {
    border-color: #f87171;
}

/* ── FOOTER ──────────────────────────────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    padding: 2rem 0; position: relative; z-index: 1;
}
.footer-inner {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 1rem;
}
.footer-copy { font-size: 12px; color: var(--text-dim); }
.footer-links { display: flex; gap: 1.5rem; list-style: none; }
.footer-links a { font-size: 12px; color: var(--text-dim); text-decoration: none; }
.footer-links a:hover,
.footer-links a:focus { color: var(--accent); }
.footer-links a[aria-current="page"] { color: var(--accent); }

/* ── LEGAL PAGES (Impressum, Datenschutz) ────────────────────── */
.legal-page {
    padding-top: 8rem;
}
.legal-content {
    max-width: 760px;
    margin-top: 2rem;
}
.legal-content h2 {
    font-family: var(--sans);
    font-size: 1.3rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
    color: var(--text);
}
.legal-content h3 {
    font-family: var(--sans);
    font-size: 1.05rem;
    font-weight: 700;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}
.legal-content h4 {
    font-family: var(--sans);
    font-size: 0.95rem;
    font-weight: 700;
    margin-top: 1.25rem;
    margin-bottom: 0.4rem;
    color: var(--text);
}
.legal-content p {
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 1rem;
}
.legal-content ul {
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}
.legal-content li {
    margin-bottom: 0.25rem;
}
.legal-content a {
    color: var(--accent);
    text-decoration: none;
}
.legal-content a:hover {
    text-decoration: underline;
}

/* ── FADE-IN ANIMATION ───────────────────────────────────────── */
.fade-in {
    opacity: 0; transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── FOKUS-STYLES (Barrierefreiheit) ──────────────────────────── */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ── REDUCED MOTION (Barrierefreiheit) ────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
    }
    .fade-in {
        opacity: 1;
        transform: none;
    }
}

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
    .services-grid { grid-template-columns: 1fr 1fr; }
    .stats-row { grid-template-columns: 1fr 1fr; }
    .stat { border-bottom: 1px solid var(--border); }
    .contact-inner { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 600px) {
    .services-grid { grid-template-columns: 1fr; }
    .stats-row { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }

    /* Mobile Navigation */
    .nav-toggle { display: flex; }
    .nav-links {
        display: none;
        position: absolute;
        top: 58px; left: 0; right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(8,12,16,0.95);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border);
        padding: 1rem 2rem;
    }
    .nav-links.open { display: flex; }
    .nav-links a {
        display: block;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border);
    }
    .nav-links li:last-child a { border-bottom: none; }
    .nav-cta { display: none; }

    .process-step { grid-template-columns: 50px 1fr; gap: 1rem; }
    .step-num { font-size: 2rem; }
}