:root {
    --color-magenta: #e91e63;
    --color-cyan: #00bcd4;
    --color-cyan-dark: #0097a7;
    --color-dark: #333;
    --bg-color: #f0f2f5; /* Etwas dunkleres Grau für mehr Kontrast zu weißen Boxen */
}

body {
    margin: 0;
    /* Moderne System-Schrift */
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--color-dark);
}

.container { width: 90%; max-width: 1100px; margin: 0 auto; }
a { text-decoration: none; color: inherit; transition: 0.2s; }

/* HEADER - BUNT statt Weiß */
header {
    background-color: var(--color-cyan);
    color: white;
    padding: 15px 0;
    box-shadow: 0 4px 10px rgba(0,188,212, 0.3);
}

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

/* Logo Box weiß hinterlegt für Kontrast */
.logo { height: 50px; background: white; padding: 5px; border-radius: 50%; margin-right: 15px; }
.logo-link { display: flex; align-items: center; color: white; }
.school-name { font-weight: 800; font-size: 1.3rem; letter-spacing: 0.5px; }

/* Navigation */
.nav-list { list-style: none; display: flex; margin: 0; padding: 0; align-items: center; }
.nav-list li { margin-left: 25px; }
.nav-list a { font-weight: 600; opacity: 0.9; }
.nav-list a:hover { opacity: 1; text-decoration: underline; }

/* Buttons - RUND (Pill Shape) */
.btn {
    padding: 12px 25px;
    border-radius: 50px; /* Macht sie rund */
    font-weight: bold;
    display: inline-block;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.btn-small { padding: 8px 20px; font-size: 0.9rem; }

/* Login Button sticht heraus */
.btn-cyan { 
    background-color: white; 
    color: var(--color-cyan-dark); 
} 
.btn-cyan:hover { background-color: var(--color-magenta); color: white; }

.btn-magenta { background-color: var(--color-magenta); color: white; }
.btn-magenta:hover { transform: scale(1.05); }

.btn-outline-white { border: 2px solid white; color: white; background: transparent; box-shadow: none; }
.btn-outline-white:hover { background: white; color: var(--color-cyan); }

/* HERO Sektion */
.hero-image-placeholder {
    background: var(--color-cyan); /* Wenn kein Bild da ist, ist es Cyan */
    background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-cyan-dark) 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    border-bottom-left-radius: 50px; /* Moderne Asymmetrie */
    border-bottom-right-radius: 50px;
    margin-bottom: 40px;
}
.hero h1 { font-size: 3rem; margin-bottom: 1rem; }

/* KACHELN - Weicher und schwebend */
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 25px; }

.card {
    background: white;
    padding: 30px;
    border-radius: 20px; /* Starke Rundung */
    border: none;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05); /* Sehr weicher Schatten */
    text-align: center;
}
.card:hover { transform: translateY(-7px); box-shadow: 0 15px 30px rgba(0,0,0,0.1); }
.card h3 { color: var(--color-cyan-dark); margin-bottom: 10px; }

/* Footer */
footer { text-align: center; padding: 40px 0; color: #666; font-size: 0.9rem; }