/* --- MODERN LOOK --- */
html[data-theme="normal"] {
    --bg: #f8f9fa;
    --text: #212529;
    --primary: #4f46e5;
    --card-bg: #ffffff;
    --accent: #e0e7ff;
    --font: 'Segoe UI', Roboto, sans-serif;
}

html[data-theme="festive"] {
    --bg: #1a0f1a;
    --text: #f3e8ff;
    --primary: #d946ef;
    --card-bg: #2e102e;
    --accent: #fcd34d; /* Goldener Akzent */
    --font: 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font);
    transition: background 0.3s, color 0.3s;
    margin: 0; line-height: 1.6;
}

header {
    background: var(--card-bg);
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex; justify-content: space-between; align-items: center;
}

header nav a {
    text-decoration: none; color: var(--text); margin: 0 10px; opacity: 0.8;
}
header nav a.active { color: var(--primary); font-weight: bold; opacity: 1; }

.container { max-width: 900px; margin: 2rem auto; padding: 0 1rem; }

.btn-example {
    display: inline-block; padding: 0.75rem 1.5rem; background: var(--primary);
    color: white; border-radius: 8px; text-decoration: none; transition: transform 0.2s;
}
.btn-example:hover { transform: translateY(-2px); }

/* Sticky Notes als moderne Kacheln */
.sticky-container { display: flex; gap: 1.5rem; margin-top: 2rem; flex-wrap: wrap; }
.sticky-note {
    background: var(--card-bg);
    border-left: 5px solid var(--primary);
    padding: 1.5rem; border-radius: 12px; width: 250px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
html[data-theme="festive"] .sticky-note {
    border-left-color: var(--accent);
    box-shadow: 0 0 15px rgba(217, 70, 239, 0.2);
}

footer {
    text-align: center;
}