:root {
    --bg-color: #121212;
    --card-bg: rgba(26, 26, 26, 0.4);
    --text-primary: #ededed;
    --text-secondary: #999999;
    --meta-color: #666666;
    --border-color: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(255, 255, 255, 0.12);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --accent: #b07585;
    --accent-soft: rgba(176, 117, 133, 0.18);
    --nav-bg: rgba(18, 18, 18, 0.7);
    --lang-switch-bg: rgba(255, 255, 255, 0.02);
    --card-hover-bg: rgba(30, 30, 30, 0.6);
    --card-hover-shadow: 0 10px 40px rgba(0,0,0,0.5);
    --title-gradient: linear-gradient(180deg, #ffffff 0%, #cccccc 100%);
    --btn-bg: transparent;
    --btn-border: rgba(255, 255, 255, 0.3);
    --btn-hover-bg: #ffffff;
    --btn-hover-color: #000000;
    --btn-hover-border: #ffffff;
    --btn-hover-shadow: 0 8px 20px rgba(255,255,255,0.1);
    --footer-border: rgba(255,255,255,0.05);
    --bg-radial-1: rgba(255, 255, 255, 0.015);
    --bg-radial-2: rgba(176, 117, 133, 0.025);
    --color-scheme: dark;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --font-serif: 'Times New Roman', 'Times', serif;
}

:root[data-theme="light"] {
    --bg-color: #fbfaf6;
    --card-bg: rgba(255, 255, 255, 0.5);
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --meta-color: #888888;
    --border-color: rgba(0, 0, 0, 0.04);
    --border-hover: rgba(0, 0, 0, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.03);
    --accent: #6b2e3c;
    --accent-soft: rgba(107, 46, 60, 0.12);
    --nav-bg: rgba(251, 250, 246, 0.8);
    --lang-switch-bg: rgba(0, 0, 0, 0.02);
    --card-hover-bg: rgba(255, 255, 255, 0.9);
    --card-hover-shadow: 0 15px 35px rgba(0,0,0,0.04);
    --title-gradient: linear-gradient(180deg, #1a1a1a 0%, #555555 100%);
    --btn-bg: transparent;
    --btn-border: rgba(0, 0, 0, 0.2);
    --btn-hover-bg: #1a1a1a;
    --btn-hover-color: #ffffff;
    --btn-hover-border: #1a1a1a;
    --btn-hover-shadow: 0 8px 20px rgba(0,0,0,0.1);
    --footer-border: rgba(0,0,0,0.05);
    --bg-radial-1: rgba(0, 0, 0, 0.01);
    --bg-radial-2: rgba(107, 46, 60, 0.025);
    --color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }

body {
    margin: 0; padding: 0;
    font-family: var(--font-body);
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 15% 50%, var(--bg-radial-1), transparent 25%),
        radial-gradient(circle at 85% 30%, var(--bg-radial-2), transparent 25%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    color-scheme: var(--color-scheme);
}

.lang-en { display: none; }
body.english .lang-de { display: none; }
body.english .lang-en { display: block; }
body.english span.lang-en, body.english a.lang-en { display: inline; }
body.english span.lang-de, body.english a.lang-de { display: none; }

nav {
    position: sticky; top: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 2rem;
    display: flex; justify-content: space-between; align-items: center;
    transition: all 0.3s ease;
}
.nav-controls { display: flex; align-items: center; gap: 1rem; }
.nav-link {
    text-decoration: none; color: var(--meta-color);
    font-size: 0.85rem; font-weight: 500;
    letter-spacing: 0.05em; text-transform: uppercase;
    transition: color 0.3s ease; margin-right: 0.5rem;
    font-family: var(--font-body);
}
.nav-link:hover { color: var(--text-primary); }

.theme-switch {
    background: var(--lang-switch-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%; width: 38px; height: 38px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; color: var(--meta-color); transition: all 0.3s ease;
}
.theme-switch:hover { color: var(--text-primary); border-color: var(--border-hover); }

.lang-switch {
    font-size: 0.85rem; font-weight: 500;
    display: flex; align-items: center; gap: 12px;
    background: var(--lang-switch-bg);
    padding: 0.4rem 0.8rem; border-radius: 30px;
    border: 1px solid var(--border-color); transition: all 0.3s ease;
}
.lang-btn {
    background: none; border: none; cursor: pointer;
    color: var(--meta-color); padding: 0; font-family: inherit;
    transition: color 0.3s ease; letter-spacing: 0.05em;
}
.lang-btn.active { color: var(--accent); font-weight: 600; }
.lang-btn:hover:not(.active) { color: var(--text-secondary); }

.container { max-width: 1000px; margin: 0 auto; padding: 3rem 1.5rem 6rem 1.5rem; }

section { padding: 4rem 0 2rem 0; position: relative; }
section:not(:last-child)::after {
    content: ''; position: absolute; bottom: 0;
    left: 10%; right: 10%; height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .grid { grid-template-columns: repeat(2, 1fr); gap: 2.5rem; } }

.hero {
    min-height: 50vh; padding: 5rem 0 6rem 0; border-bottom: none;
    display: grid; grid-template-columns: 1fr; gap: 2rem;
}
@media (min-width: 768px) {
    .hero { grid-template-columns: 1.15fr 0.85fr; align-items: end; gap: 3rem; }
}
.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(3.5rem, 9vw, 6rem);
    font-weight: 200; letter-spacing: -0.04em; margin: 0; line-height: 1.05;
    background: var(--title-gradient);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero h1 em {
    font-family: var(--font-serif); font-style: italic; font-weight: 300;
    color: var(--accent); -webkit-text-fill-color: var(--accent); background: none;
}
.hero-aside { padding-bottom: 0.6rem; padding-left: 0; }
@media (min-width: 768px) { .hero-aside { padding-left: 1rem; padding-bottom: 1.2rem; } }

.rotator {
    font-size: 1.2rem; font-weight: 300; color: var(--text-secondary);
    line-height: 1.55; min-height: 5.5em; position: relative;
}
.rotator-line {
    position: absolute; inset: 0; opacity: 0; transform: translateY(8px);
    transition: opacity 0.9s ease, transform 0.9s ease;
}
.rotator-line.is-active { opacity: 1; transform: translateY(0); }
.rotator-line em { font-style: italic; color: var(--text-primary); }

.quote-band { padding: 6rem 0 5rem 0; text-align: left; max-width: 860px; margin: 0 auto; }
.quote-band blockquote {
    margin: 0; font-family: var(--font-serif); font-style: italic; font-weight: 400;
    font-size: clamp(1.5rem, 3.4vw, 2.4rem); line-height: 1.35; color: var(--text-primary);
    letter-spacing: -0.01em; position: relative; padding-left: 1.5rem;
}
.quote-band blockquote::before {
    content: ""; position: absolute; left: 0; top: 0.2em; bottom: 0.2em;
    width: 2px; background: var(--accent); opacity: 0.7;
}
.quote-band cite {
    display: block; margin-top: 1.5rem; padding-left: 1.5rem;
    font-family: var(--font-body); font-style: normal; font-size: 0.85rem;
    letter-spacing: 0.08em; text-transform: uppercase; color: var(--meta-color);
}

.card {
    background: var(--card-bg); backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px); border: 1px solid var(--border-color);
    padding: 3rem 2.5rem; border-radius: 12px; box-shadow: 0 10px 30px var(--shadow-color);
    display: flex; flex-direction: column; justify-content: flex-start;
    transition: border-color 0.4s ease, background 0.4s ease;
    position: relative; overflow: hidden;
}
.card:hover { border-color: var(--border-hover); background: var(--card-hover-bg); }
.card > * { position: relative; z-index: 1; }

.section-title {
    font-family: var(--font-heading); font-size: 3.2rem; font-weight: 200;
    text-align: center; margin-bottom: 5rem; letter-spacing: -0.03em;
    background: var(--title-gradient);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

.term {
    font-family: var(--font-heading); font-size: 1.8rem; font-weight: 300;
    margin: 0 0 1.5rem 0; color: var(--text-primary); letter-spacing: -0.01em;
    display: flex; align-items: center; position: relative;
}
.term::after {
    content: ''; display: block; flex-grow: 1; height: 1px;
    background: linear-gradient(90deg, var(--border-hover), transparent);
    margin-left: 1rem; opacity: 0.5; transition: background 0.5s ease, opacity 0.5s ease;
}
.card:hover .term::after { background: linear-gradient(90deg, var(--accent), transparent); opacity: 1; }

.definitions {
    list-style-type: none; padding: 0; margin: 0;
    font-size: 1rem; color: var(--text-secondary); counter-reset: def-counter;
}
.definitions li {
    margin-bottom: 1.25rem; position: relative; padding-left: 2rem;
    font-weight: 300; opacity: 0; transform: translateY(8px);
    transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
.definitions li.is-visible { opacity: 1; transform: translateY(0); }
.definitions li::before {
    counter-increment: def-counter; content: "0" counter(def-counter) ".";
    position: absolute; left: 0; top: 0.1rem;
    font-family: var(--font-heading); font-size: 0.85rem; color: var(--meta-color); font-weight: 300;
}
.definitions li em { color: var(--accent); font-style: italic; font-weight: inherit; }

.text-block {
    color: var(--text-secondary); margin-top: 0.5rem; margin-bottom: 1rem;
    font-size: 1rem; text-align: left; font-weight: 300; line-height: 1.8;
}
.text-block em { color: var(--accent); font-style: italic; }

.contact-box {
    text-align: center; align-items: center; justify-content: center;
    background: transparent; border: none; box-shadow: none; padding: 3rem 2.5rem;
}
.contact-box:hover { box-shadow: none; border: none; background: transparent; }
.contact-box p { color: var(--text-secondary); font-weight: 300; margin: 0 0 1.5rem 0; font-size: 1rem; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    background-color: var(--btn-bg); color: var(--text-primary);
    border: 1px solid var(--btn-border); text-decoration: none;
    padding: 14px 40px; font-weight: 400; border-radius: 40px;
    transition: all 0.4s ease; font-family: var(--font-body);
    letter-spacing: 0.05em; text-transform: uppercase; font-size: 0.85rem;
}
.btn:hover {
    background-color: var(--btn-hover-bg); color: var(--btn-hover-color);
    transform: translateY(-2px); box-shadow: var(--btn-hover-shadow);
    border-color: var(--btn-hover-border);
}

.site-footer {
    margin-top: 5rem; padding: 2rem 1.5rem;
    border-top: 1px solid var(--footer-border); font-size: 0.8rem; color: var(--meta-color);
    display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
    gap: 1rem; max-width: 1000px; margin-left: auto; margin-right: auto; line-height: 1.5;
}
.site-footer a { color: var(--text-secondary); text-decoration: none; transition: color 0.2s; }
.site-footer a:hover { color: var(--accent); }
.site-footer .footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }

.anchor { position: relative; top: -120px; visibility: hidden; }

.fade-in-up {
    opacity: 0; transform: translateY(20px);
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.25s; }
.delay-3 { animation-delay: 0.4s; }
.delay-4 { animation-delay: 0.55s; }
.delay-5 { animation-delay: 0.7s; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .definitions li { opacity: 1; transform: none; }
    .rotator-line { transition: none; }
}

/* ============================================================
    CODEX
   ============================================================ */

.codex-number {
    font-family: var(--font-heading);
    font-size: clamp(4rem, 10vw, 7rem);
    font-weight: 200; line-height: 0.85; color: var(--accent);
    opacity: 0.18; letter-spacing: -0.05em; margin-bottom: 0.5rem;
    display: block; transition: opacity 0.4s ease;
}
.card:hover .codex-number { opacity: 0.32; }

.codex-lead {
    font-family: var(--font-heading);
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    font-weight: 300; color: var(--text-primary);
    line-height: 1.35; margin: 0 0 1.25rem 0; letter-spacing: -0.01em;
}
.codex-lead em { color: var(--accent); font-style: italic; }

.codex-body {
    font-size: 0.9rem; color: var(--text-secondary);
    font-weight: 300; line-height: 1.8; margin: 0;
    border-top: 1px solid var(--border-color); padding-top: 1.25rem;
}

.codex-intro {
    max-width: 600px; margin: 0 0 1rem 0;
    color: var(--text-secondary); font-weight: 300; font-size: 1rem; line-height: 1.7;
}

@media (min-width: 900px) {
    .grid-codex { grid-template-columns: repeat(2, 1fr); gap: 2.5rem; }
}

/* ============================================================
    PROJEKTE
   ============================================================ */

.project-hero { min-height: 30vh; padding: 5rem 0 4rem 0; border-bottom: none; }

.project-subtitle {
    font-family: var(--font-heading); font-size: clamp(1rem, 2vw, 1.2rem);
    font-weight: 300; color: var(--text-secondary); margin-top: 0.75rem; line-height: 1.5;
}

.case-study { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-top: 1rem; }
@media (min-width: 900px) {
    .case-study { grid-template-columns: 2fr 1fr; gap: 3rem; align-items: start; }
}

.case-sidebar { display: flex; flex-direction: column; gap: 1.5rem; }

.phase-block { margin-bottom: 2.5rem; }

.phase-label {
    font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
    font-weight: 600; color: var(--accent); opacity: 0.8; margin-bottom: 0.5rem;
}

.phase-title {
    font-family: var(--font-heading); font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-weight: 300; color: var(--text-primary); letter-spacing: -0.02em;
    line-height: 1.2; margin: 0 0 1rem 0;
}

.phase-body {
    color: var(--text-secondary); font-size: 0.92rem; font-weight: 300; line-height: 1.8; margin: 0;
}
.phase-body + .phase-body { margin-top: 0.85rem; }

.info-card {
    background: var(--card-bg); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px); border: 1px solid var(--border-color);
    border-radius: 10px; padding: 1.5rem;
}
.info-card-label {
    font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase;
    font-weight: 600; color: var(--meta-color); margin-bottom: 0.75rem;
}
.info-card ul { list-style: none; padding: 0; margin: 0; }
.info-card ul li {
    font-size: 0.88rem; color: var(--text-secondary); font-weight: 300;
    padding: 0.35rem 0; border-bottom: 1px solid var(--border-color); line-height: 1.4;
}
.info-card ul li:last-child { border-bottom: none; }
.info-card ul li::before {
    content: '—'; color: var(--accent); opacity: 0.6; margin-right: 0.5rem; font-size: 0.8rem;
}

.result-highlight {
    background: var(--accent-soft); border-left: 2px solid var(--accent);
    border-radius: 0 8px 8px 0; padding: 1.25rem 1.5rem; margin: 2rem 0;
}
.result-highlight p {
    font-size: 0.95rem; color: var(--text-primary);
    line-height: 1.7; margin: 0; font-weight: 300;
}

.metric-row { display: flex; flex-direction: column; gap: 0.5rem; }
.metric-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.5rem 0; border-bottom: 1px solid var(--border-color);
}
.metric-item:last-child { border-bottom: none; }
.metric-label { font-size: 0.8rem; color: var(--meta-color); font-weight: 300; }
.metric-value { font-family: var(--font-heading); font-size: 0.95rem; color: var(--accent); font-weight: 400; }
  
/* ============================================================
   RESPONSIVE DESIGN FÜR MOBILE GERÄTE (max-width: 767px)
   ============================================================ */
@media (max-width: 767px) {
    
    /* 1. Navigation für kleine Bildschirme optimieren */
    nav {
        padding: 0.75rem 1rem;
    }
    .nav-controls {
        flex-wrap: wrap;       /* Erlaubt sanften Umbruch auf Handys */
        justify-content: center; /* Zentriert die Elemente, falls sie umbrechen */
        gap: 0.75rem;          /* Etwas kompakterer Abstand */
        width: 100%;
    }
    .nav-link {
        font-size: 0.8rem;     /* Leicht kleinere Schrift der Links */
        margin-right: 0;
    }
    .theme-switch {
        width: 34px;           /* Buttons minimal verkleinern */
        height: 34px;
    }
    .lang-switch {
        padding: 0.3rem 0.6rem;
        font-size: 0.8rem;
        gap: 8px;
    }

    /* 2. Allgemeine Container- und Sektions-Abstände verringern */
    .container {
        padding: 1.5rem 1rem 4rem 1rem; /* Weniger Rand links/rechts */
    }
    section {
        padding: 2.5rem 0 1.25rem 0;   /* Kompaktzeit in der Vertikalen */
    }
    .section-title {
        font-size: 2.2rem;             /* Titel anpassen */
        margin-bottom: 2.5rem;
    }

    /* 3. Hero-Schriftgröße herabsetzen */
    .hero {
        padding: 2rem 0 3rem 0;
        min-height: auto;              /* Nimmt auf Mobile nicht mehr halbe Bildschirmhöhe ein */
    }
    .hero h1 {
        /* Das Minimum von 3.5rem auf 2.2rem senken, damit es auf jedes Display passt */
        font-size: clamp(2.2rem, 9vw, 4rem); 
    }

    /* 4. Karten-Padding reduzieren, damit Text Platz zum Atmen hat */
    .card {
        padding: 2rem 1.25rem;         /* Links/Rechts von 40px auf 20px reduziert */
    }
    
    /* 5. Rotator-Höhe flexibler machen, da Text mehr Zeilen braucht */
    .rotator {
        min-height: 8.5em;             /* Mehr Platz nach unten für die umbrechenden Fragen */
        font-size: 1.05rem;
    }

    /* 6. Projektseite (Case Study) optimieren */
    .case-study {
        margin-top: 1.5rem;
    }
    .phase-block {
        margin-bottom: 1.75rem;
    }
    .result-highlight {
        margin: 1.5rem 0;
        padding: 1rem 1.25rem;
    }
}