/* ============================================================
   Registrierungsseite – ausgelagert aus index.php (CSP-Hardening)
   ============================================================ */
        /* Additional styles for registration page */
        .registration-page {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--color-bg-alt);
        }

        .registration-navbar {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }

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

        .nav-logo {
            height: 50px;
            width: auto;
            object-fit: contain;
        }

        .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary);
        }

        .registration-container {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 2rem 1rem;
        }

        .registration-card {
            background: white;
            border-radius: var(--border-radius-xl);
            box-shadow: var(--shadow-xl);
            padding: 2.5rem;
            width: 100%;
            max-width: 600px;
            animation: slideUp 0.5s ease;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .card-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .fire-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            display: inline-block;
            animation: flicker 2s infinite;
        }

        @keyframes flicker {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.8; }
        }

        .card-header h1 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0.5rem;
        }

        .card-header p {
            color: var(--color-text-secondary);
            font-size: 1rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 0.5rem;
        }

        .form-control {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 2px solid var(--color-gray-300);
            border-radius: var(--border-radius-md);
            font-size: 1rem;
            transition: var(--transition);
            font-family: inherit;
            background: white;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.1);
        }

        .form-control::placeholder {
            color: var(--color-gray-400);
        }

        .form-text {
            display: block;
            margin-top: 0.5rem;
            font-size: 0.813rem;
            color: var(--color-text-secondary);
            line-height: 1.4;
        }

        .pin-input {
            font-size: 1.25rem;
            text-align: center;
            letter-spacing: 0.5rem;
            font-weight: 600;
        }

        .button-group {
            display: grid;
            gap: 1rem;
            margin-top: 2rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: var(--border-radius-md);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            font-family: inherit;
            position: relative;
            overflow: hidden;
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

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

        .btn-primary:hover:not(:disabled) {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-success {
            background: var(--color-success);
            color: white;
        }

        .btn-success:hover:not(:disabled) {
            background: #1B5E20;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-danger {
            background: var(--color-danger);
            color: white;
        }

        .btn-danger:hover:not(:disabled) {
            background: #B71C1C;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn.loading {
            pointer-events: none;
        }

        .btn.loading::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            top: 50%;
            left: 50%;
            margin-left: -10px;
            margin-top: -10px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 0.6s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        .alert {
            padding: 1rem;
            border-radius: var(--border-radius-md);
            margin-bottom: 1.5rem;
            font-size: 0.938rem;
            animation: slideDown 0.3s ease;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .alert-info {
            background: var(--color-info-light);
            color: var(--color-info);
            border: 1px solid var(--color-info);
        }

        .alert-warning {
            background: var(--color-warning-light);
            color: var(--color-warning);
            border: 1px solid var(--color-warning);
        }

        .btn-secondary {
            background: var(--color-gray-200);
            color: var(--color-text);
        }

        .btn-secondary:hover:not(:disabled) {
            background: var(--color-gray-300);
        }

        .btn-sm {
            padding: 0.5rem 0.875rem;
            font-size: 0.875rem;
        }

        /* Termine-Panel nach erfolgreicher Zusage (siehe functions.js) */
        .termine-panel {
            text-align: left;
        }

        .termine-list {
            list-style: none;
            margin: 1rem 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .termin-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            padding: 0.625rem 0.875rem;
            background: white;
            border: 1px solid var(--color-gray-300);
            border-radius: var(--border-radius-md);
            font-size: 0.9rem;
        }

        .termine-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-top: 1rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .registration-card {
                padding: 2rem 1.5rem;
            }

            .card-header h1 {
                font-size: 1.5rem;
            }

            .nav-container {
                padding: 0 1rem;
            }

            .brand-text {
                font-size: 1rem;
            }
        }

        @media (max-width: 480px) {
            .registration-card {
                padding: 1.5rem 1rem;
            }

            .fire-icon {
                font-size: 2.5rem;
            }

            .card-header h1 {
                font-size: 1.25rem;
            }
        }

        /* Loading overlay */
        #loadingOverlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            z-index: 9999;
            align-items: center;
            justify-content: center;
        }

        .spinner {
            width: 60px;
            height: 60px;
            border: 4px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 0.8s linear infinite;
        }

/* Ersetzt vormalige inline style="margin: 0.5rem 0 0 0" Attribute */
.note-spacing { margin: 0.5rem 0 0 0; }