/* ==========================================================================
   Globale Variablen & Grund-Styles
   ========================================================================== */
:root {
    --primary-color: #007aff;
    --primary-hover-color: #005ec4;
    --primary-bg-color: rgba(0, 122, 255, 0.1);
    
    --background-color-dark: #121212;
    --surface-color-dark: #1e1e1e;
    --surface-hover-dark: #2a2a2a;
    --text-color-dark: #e0e0e0;
    --text-muted-dark: #888888;
    --border-color-dark: #333333;
    
    --background-color-light: #f0f2f5;
    --surface-color-light: #ffffff;
    --surface-hover-light: #f8f8f8;
    --text-color-light: #1f1f1f;
    --text-muted-light: #6e6e6e;
    --border-color-light: #e8e8e8;

    --error-color: #ff4d4f;
    --info-color: #1890ff;
    --success-color: #52c41a;
    
    --font-family: 'Inter', sans-serif;
    --transition-speed: 0.2s;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
}

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

html {
    scroll-behavior: smooth;
}

/* ==========================================================================
   Login Seite
   ========================================================================== */
body.login-page-body {
    font-family: var(--font-family);
    margin: 0;
    background-color: var(--background-color-dark);
    color: var(--text-color-dark);
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.login-wrapper {
    display: flex;
    width: 100%;
    max-width: 1200px;
    min-height: 600px;
    background-color: var(--surface-color-dark);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.login-branding {
    width: 50%;
    background-image: url('https://images.unsplash.com/photo-1555099962-4199c345e546?q=80&w=2574&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    color: white;
    position: relative;
}

.login-branding::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 20%, rgba(0,0,0,0) 60%);
}

.branding-content {
    position: relative;
    z-index: 1;
}

.branding-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 10px 0;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.branding-content p {
    font-size: 1rem;
    max-width: 400px;
    line-height: 1.6;
    margin: 0;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.login-form-container {
    width: 50%;
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-form-container .form-header {
    margin-bottom: 30px;
    text-align: center;
}

.login-form-container .form-header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin: 0 0 10px 0;
}

.login-form-container .form-header p {
    color: var(--text-muted-dark);
    margin: 0;
}

.message {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 20px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.message.error { background-color: rgba(255, 77, 79, 0.1); color: var(--error-color); }
.message.info { background-color: rgba(24, 144, 255, 0.1); color: var(--info-color); }

.login-form-container .form-group {
    margin-bottom: 25px;
}

.login-form-container .form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-muted-dark);
}

.login-form-container .form-input {
    width: 100%;
    padding: 14px 16px;
    background-color: var(--background-color-dark);
    border: 1px solid var(--border-color-dark);
    border-radius: var(--border-radius-md);
    color: var(--text-color-dark);
    font-size: 1rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.login-form-container .form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.3);
}

.submit-btn {
    width: 100%;
    padding: 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.submit-btn:hover:not(:disabled) {
    background-color: #0062cc;
}

.submit-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.submit-btn:disabled {
    background-color: var(--border-color-dark);
    color: var(--text-muted-dark);
    cursor: not-allowed;
}

.login-form-container footer {
    margin-top: 30px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted-dark);
}

@media (max-width: 992px) {
    .login-branding { display: none; }
    .login-form-container { width: 100%; }
    .login-wrapper { max-width: 480px; min-height: auto; }
}

@media (max-width: 576px) {
    body.login-page-body { padding: 20px; }
    .login-wrapper { width: 100%; }
    .login-form-container { padding: 30px; }
}

/* ==========================================================================
   Dashboard
   ========================================================================== */
body.dark-mode {
    --background-color: var(--background-color-dark);
    --surface-color: var(--surface-color-dark);
    --surface-hover-color: var(--surface-hover-dark);
    --text-color: var(--text-color-dark);
    --text-muted-color: var(--text-muted-dark);
    --border-color: var(--border-color-dark);
    --shadow-color: rgba(0,0,0,0.4);
}

body.light-mode {
    --background-color: var(--background-color-light);
    --surface-color: var(--surface-color-light);
    --surface-hover-color: var(--surface-hover-light);
    --text-color: var(--text-color-light);
    --text-muted-color: var(--text-muted-light);
    --border-color: var(--border-color-light);
    --shadow-color: rgba(0,0,0,0.08);
}

body {
    font-family: var(--font-family);
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.dashboard-container {
    display: flex;
    flex-direction: column;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    gap: 2rem;
}

@media(max-width: 768px) {
    .dashboard-container { padding: 1rem; gap: 1rem; }
}

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

.header-title h1 {
    font-size: 1.8rem;
    margin: 0;
    font-weight: 700;
}

.header-title p {
    margin: 5px 0 0 0;
    color: var(--text-muted-color);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-btn {
    background-color: var(--surface-color);
    color: var(--text-muted-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    height: 40px;
    width: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.header-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background-color: var(--primary-bg-color);
}

#session-timer {
    background-color: var(--surface-color);
    color: var(--text-muted-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    height: 40px;
    padding: 0 1rem;
    font-weight: 500;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
}

.card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: all var(--transition-speed);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-header h2 i { color: var(--text-muted-color); }

.card-content {
    padding: 1.5rem;
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.4s ease-in-out;
}

.card-content > div { overflow: hidden; }
.card.open > .card-content { grid-template-rows: 1fr; }
.collapse-icon { transition: transform 0.4s ease-in-out; }
.card.open .collapse-icon { transform: rotate(180deg); }

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.quick-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-speed);
}

.quick-link i {
    font-size: 1.2rem;
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.quick-link:hover {
    background-color: var(--surface-hover-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted-color);
}

.data-table td {
    font-size: 0.9rem;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover { background-color: var(--surface-hover-color); }

.management-form {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-end;
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.management-form .form-group { flex: 1 1 200px; }

.management-form .form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-muted-color);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-color);
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-bg-color);
}

.btn {
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

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

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

.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted-color);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0.5rem;
}

.btn-icon.delete:hover { color: var(--danger-color); }

#feedback-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.toast {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-md);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #fff;
    opacity: 0;
    transform: translateY(20px);
    animation: slideInUp 0.5s forwards;
}

.toast.success { background-color: var(--success-color); }
.toast.error { background-color: var(--danger-color); }

@keyframes slideInUp { to { opacity: 1; transform: translateY(0); } }