:root {
    --bg-color: #f4f4f4;
    --container-bg: #ffffff;
    --header-bg: rgba(255, 255, 255, 0.95);
    --accent-color: #00709d;
    --footer-bg: #e0e0e0; /* Viel helleres Grau für den Day Mode */
    --footer-text: #111111; /* Schwarze Schrift im Footer */
    --footer-line: rgba(0, 0, 0, 0.1);
    --text-primary: #333333;
    --text-secondary: #555555;
    --border-color: #dddddd;
}

[data-theme="dark"] {
    --bg-color: #0d0d0d;
    --container-bg: #141414;
    --header-bg: rgba(15, 15, 15, 0.95);
    --footer-bg: #0a0a0a; /* Tiefschwarz im Dark Mode */
    --footer-text: #ffffff; /* Weiße Schrift im Dark Mode */
    --footer-line: rgba(255, 255, 255, 0.1);
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --border-color: #2a2a2a;
}

body { margin: 0; background-color: var(--bg-color); font-family: 'Roboto', sans-serif; color: var(--text-primary); overflow-x: hidden; }

header {
    position: fixed; top: 0; left: 0; right: 0; height: 65px;
    background-color: var(--header-bg); backdrop-filter: blur(8px);
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 30px; z-index: 2000; border-bottom: 1px solid var(--border-color);
    opacity: 0; transform: translateY(-100%); transition: all 0.4s ease;
}
header.visible { opacity: 1; transform: translateY(0); }

.header-brand { display: flex; align-items: center; gap: 12px; }
.header-brand-logo { height: 35px; width: auto; }
.header-logo-text { font-weight: 700; color: var(--accent-color); font-size: 16px; }

.hero { position: fixed; top: 0; left: 0; width: 100%; height: 100vh; display: flex; justify-content: center; align-items: center; z-index: 1; }
.hero-content { text-align: center; max-width: 600px; }
.hero-logo { width: 280px; margin-bottom: 20px; }
#hero-subline { font-size: 18px; font-weight: 300; color: var(--text-secondary); margin-bottom: 30px; }

.scroll-indicator { display: flex; flex-direction: column; align-items: center; gap: 8px; opacity: 0.7; }
.mouse { width: 20px; height: 34px; border: 2px solid var(--text-secondary); border-radius: 12px; display: flex; justify-content: center; }
.wheel { width: 3px; height: 6px; background-color: var(--accent-color); border-radius: 2px; margin-top: 6px; animation: scroll-wheel 1.6s infinite; }
@keyframes scroll-wheel { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(12px); opacity: 0; } }
#scroll-text { font-size: 10px; text-transform: uppercase; letter-spacing: 1px; }

.content-wrapper { position: relative; z-index: 10; margin-top: 100vh; box-shadow: 0 -10px 30px rgba(0,0,0,0.1); display: flex; flex-direction: column; min-height: 100vh; }
.main-content { background-color: var(--container-bg); padding: 120px 40px; text-align: center; flex: 1; }
.main-content h2 { font-size: 32px; color: var(--accent-color); margin-bottom: 20px; }
.main-content p { max-width: 750px; margin: 0 auto; line-height: 1.8; font-size: 18px; }

/* --- FOOTER --- */
footer {
    background-color: var(--footer-bg);
    color: var(--footer-text); /* Dynamische Schriftfarbe */
    padding: 80px 0 0 0;
    text-align: center;
    transition: background-color 0.4s, color 0.4s;
}

.footer-nav { 
    display: flex; 
    justify-content: center; 
    gap: 40px; 
    margin-bottom: 50px; /* Erhöhter Abstand zwischen Nav und Icons */
    padding: 0 20px; 
}

.footer-nav a { 
    color: var(--footer-text); 
    text-decoration: none; 
    font-size: 15px; 
    opacity: 0.7; 
    transition: all 0.3s ease; 
}

.footer-nav a:hover { opacity: 1; color: var(--accent-color); }

.footer-social {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 50px; /* Erhöhter Abstand nach unten zur Trennlinie */
}

.footer-social a {
    color: var(--footer-text);
    opacity: 0.7;
    transition: all 0.3s ease;
    display: flex;
}

.footer-social a:hover {
    opacity: 1;
    color: var(--accent-color);
    transform: translateY(-2px);
}

.footer-social svg { height: 22px; width: 22px; }

.footer-bottom {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 15px 0;
    border-top: 1px solid var(--footer-line);
    margin: 0 20px;
}

.copyright { font-size: 12px; opacity: 0.5; margin: 0; line-height: 35px; }
.footer-arrow { position: absolute; right: 15px; height: 35px; width: auto; }

.header-controls { display: flex; align-items: center; gap: 10px; }
.icon-btn { background: none; border: none; color: var(--text-primary); cursor: pointer; padding: 8px; border-radius: 50%; display: flex; align-items: center; }
.icon-btn:hover { background: var(--hover-bg); }
.lang-menu { position: absolute; top: 60px; right: 0; background: var(--container-bg); border: 1px solid var(--border-color); border-radius: 6px; width: 150px; opacity: 0; visibility: hidden; transition: 0.2s; }
.lang-menu.show { opacity: 1; visibility: visible; }
.lang-option { padding: 10px 15px; cursor: pointer; display: flex; align-items: center; gap: 8px; font-size: 13px; }
.lang-option:hover { background: var(--hover-bg); }

[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: block; }
[data-theme="light"] .icon-sun { display: none; }