:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --primary-color: #ff9800; /* Warm Orange Accent */
    --primary-hover: #fb8c00;
    --danger-color: #f44336;
    --border-color: #333;
    --border-radius: 8px;
    --font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --shadow: 0 4px 6px rgba(0,0,0,0.3);
}

[data-theme="light"] {
    --bg-color: #f5f7fa;
    --surface-color: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --primary-color: #009688; /* Darker orange for light mode readability */
    --primary-hover: #00796b;
    --danger-color: #d32f2f;
    --border-color: #e0e0e0;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

a { color: var(--primary-color); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Navbar */
.navbar {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none !important;
}

.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    min-height: calc(100vh - 160px);
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-danger { color: var(--danger-color); }
.mb-4 { margin-bottom: 1rem; }

/* Cards */
.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

/* Auth */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}
.form-row .form-group {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input[type="text"], input[type="email"], input[type="password"], input[type="datetime-local"], select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: inherit;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.2s, transform 0.1s;
}
.btn:active { transform: scale(0.98); }

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}
.btn-primary:hover { background-color: var(--primary-hover); }

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}
.btn-outline:hover {
    background-color: var(--primary-color);
    color: #fff;
}

.btn-block {
    display: block;
    width: 100%;
}
.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Dashboard Notes Grid */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.note-card {
    display: flex;
    flex-direction: column;
    transition: transform 0.2s;
}
.note-card:hover { transform: translateY(-3px); }
.note-card.archived { opacity: 0.6; }

.note-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.note-title { font-size: 1.25rem; margin-bottom: 0.5rem; }
.note-desc { flex-grow: 1; margin-bottom: 1rem; color: var(--text-muted); }
.note-meta { margin-bottom: 1rem; display: flex; flex-direction: column; gap: 0.25rem; }
.note-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

/* Badges */
.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
}

.priority-niedrig { background-color: #4caf50; color: #fff; }
.priority-mittel { background-color: #2196f3; color: #fff; }
.priority-hoch { background-color: #ff9800; color: #fff; }
.priority-kritisch { background-color: #f44336; color: #fff; }

.status-label {
    font-size: 0.875rem;
    font-weight: 500;
}
.status-offen { color: var(--text-color); }
.status-in-bearbeitung { color: var(--primary-color); }
.status-erledigt { color: #4caf50; }
.status-archiviert { color: var(--text-muted); }

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--primary-color);
    color: #fff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    cursor: pointer;
    border: none;
    transition: transform 0.2s;
    z-index: 90;
}
.fab:hover { transform: scale(1.1); background-color: var(--primary-hover); }

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}
.modal.show { display: flex; }

.modal-content {
    width: 100%;
    max-width: 600px;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}
.close-modal:hover { color: var(--text-color); }

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}
.alert-error { background-color: rgba(244, 67, 54, 0.1); color: var(--danger-color); border: 1px solid var(--danger-color); }
.alert-success { background-color: rgba(76, 175, 80, 0.1); color: #4caf50; border: 1px solid #4caf50; }
.alert-warning { background-color: rgba(255, 152, 0, 0.1); color: var(--primary-color); border: 1px solid var(--primary-color); }

/* Table */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}
.table th, .table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

@media (max-width: 768px) {
    .nav-links { display: none; } /* Simplified for demo, could add hamburger */
    .dashboard-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .form-row { flex-direction: column; gap: 0; }
}