body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
.sidebar { min-height: 100vh; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.sidebar .nav-link { color: rgba(255,255,255,0.8); border-radius: 8px; margin: 2px 0; }
.sidebar .nav-link:hover, .sidebar .nav-link.active { background: rgba(255,255,255,0.1); color: white; }
.main-content { background: #f8f9fa; min-height: 100vh; }
.table-wrapper { overflow: auto; max-height: 800px; }
.day-table th { background: #6c757d; color: white; font-weight: 600; position: sticky; top: 0; z-index: 10; }
tr.calendar-today > td { color: #b40a0a !important; font-weight: bold; }
tr.weekend-row > td { background-color: #6ebd7e !important; }
tr.holiday-row > td { background-color: #f7a92e !important; }
.btn-sm-custom { padding: 0.125rem 0.5rem; font-size: 0.75rem; }
.interest-btn, .unavailable-btn, .away-btn { margin: 1px; }
.card { box-shadow: 0 2px 10px rgba(0,0,0,0.1); border: none; }
.teaching-controls { display: flex; align-items: center; gap: 5px; }
.teaching-value { min-width: 40px; text-align: center; font-weight: bold; }

.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
}

.loading-spinner {
    font-size: 2rem;
    color: #667eea;
    margin-bottom: 1rem;
}

.not-found-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
}

.not-found-container h1 {
    color: #dc3545;
    margin-bottom: 1rem;
}

.not-found-container p {
    color: #666;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5a6fd8;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.bg-warning-striped {
    background: repeating-linear-gradient(
            45deg,
            #ffc107,
            #ffc107 10px,
            #fdeeb3 10px,
            #fdeeb3 20px
    );
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-1px);
}

.alert {
    padding: 1rem;
    margin: 1rem;
    border-radius: 8px;
    border: 1px solid transparent;
}

.alert-danger {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-heading {
    color: inherit;
    margin-bottom: 0.5rem;
}

hr {
    margin: 1rem 0;
    color: inherit;
    background-color: currentColor;
    border: 0;
    opacity: 0.25;
    height: 1px;
}

#blazor-error-ui {
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

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

.login-header h2 {
    color: #333;
    margin-bottom: 8px;
    font-weight: 600;
}

.login-header p {
    color: #666;
    margin: 0;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.form-group label i {
    margin-right: 8px;
    width: 16px;
    text-align: center;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.password-input-container {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #666;
    cursor: pointer;
    padding: 4px;
}

.password-toggle:hover {
    color: #333;
}

.checkbox-container {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-label {
    color: #555;
    font-size: 14px;
    cursor: pointer;
    line-height: 1.4;
}

.checkbox-label small {
    display: block;
    color: #888;
    font-size: 12px;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-login:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.login-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e1e5e9;
}

.demo-credentials h4 {
    color: #333;
    margin-bottom: 15px;
    font-size: 16px;
}

.demo-users {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.demo-user {
    background: #f8f9fa;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
    color: #555;
}

.demo-user strong {
    color: #333;
}