* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            position: relative;
            overflow-x: hidden;
        }
        
        .bg-shape {
            position: absolute;
            z-index: 0;
            animation: float 20s infinite ease-in-out;
        }
        
        .shape-1 { top: 10%; left: 5%; width: 300px; height: 300px; background: rgba(255,255,255,0.1); border-radius: 50%; animation-delay: 0s; }
        .shape-2 { bottom: 10%; right: 5%; width: 400px; height: 400px; background: rgba(255,255,255,0.08); border-radius: 50%; animation-delay: 5s; }
        .shape-3 { top: 40%; right: 20%; width: 200px; height: 200px; background: rgba(255,255,255,0.05); border-radius: 50%; animation-delay: 10s; }
        .shape-4 { bottom: 20%; left: 15%; width: 250px; height: 250px; background: rgba(255,255,255,0.06); border-radius: 50%; animation-delay: 15s; }
        
        @keyframes float {
            0%, 100% { transform: translateY(0) translateX(0); }
            33% { transform: translateY(-30px) translateX(20px); }
            66% { transform: translateY(20px) translateX(-20px); }
        }
        
        .container {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 1;
            padding: 20px;
        }
        
        .auth-card {
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(10px);
            border-radius: 32px;
            box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
            width: 100%;
            max-width: 520px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            animation: slideUp 0.6s ease-out;
        }
        
        .auth-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 35px 60px -15px rgba(0,0,0,0.3);
        }
        
        @keyframes slideUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .card-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 40px 40px 30px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .card-header::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            animation: pulse 8s infinite;
        }
        
        @keyframes pulse {
            0%, 100% { transform: scale(1); opacity: 0.5; }
            50% { transform: scale(1.1); opacity: 0.8; }
        }
        
        .logo-register {
            width: 70px;
            height: 70px;
            background: white;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            position: relative;
            z-index: 1;
        }
        
        .logo-register i { font-size: 40px; color: #667eea; }
        
        .card-header h1 {
            color: white;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }
        
        .card-header p {
            color: rgba(255,255,255,0.9);
            font-size: 14px;
            position: relative;
            z-index: 1;
        }
        
        .card-body { padding: 40px; }
        
        .form-group { margin-bottom: 20px; position: relative; }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2d3748;
            font-size: 14px;
        }
        
        .input-group {
            position: relative;
            display: flex;
            align-items: center;
        }
        
        .input-group i {
            position: absolute;
            left: 16px;
            color: #a0aec0;
            font-size: 18px;
            transition: color 0.3s ease;
            z-index: 1;
        }
        
        .form-group input,
        .form-group select {
            width: 100%;
            padding: 14px 16px 14px 48px;
            border: 2px solid #e2e8f0;
            border-radius: 16px;
            font-size: 15px;
            transition: all 0.3s ease;
            background: white;
            font-family: 'Inter', sans-serif;
        }
        
        .form-group select {
            cursor: pointer;
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23667eea'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 20px;
        }
        
        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 4px rgba(102,126,234,0.1);
        }
        
        .toggle-password {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: #a0aec0;
            transition: color 0.3s ease;
            z-index: 2;
        }
        
        .toggle-password:hover { color: #667eea; }
        
        .password-strength {
            margin-top: 8px;
            height: 4px;
            background: #e2e8f0;
            border-radius: 2px;
            overflow: hidden;
        }
        
        .password-strength-bar {
            height: 100%;
            width: 0;
            transition: width 0.3s ease, background 0.3s ease;
        }
        
        .checkbox-group { margin: 20px 0; }
        
        .checkbox-label {
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            font-size: 14px;
            color: #2d3748;
        }
        
        .checkbox-label input {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: #667eea;
        }
        
        .charity-info {
            background: #d1fae5;
            border-radius: 12px;
            padding: 12px 15px;
            margin-top: 10px;
            font-size: 12px;
            color: #065f46;
            display: none;
        }
        
        .charity-info.visible { display: block; }
        
        .btn-register {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 16px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 8px;
        }
        
        .btn-register:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102,126,234,0.3);
        }
        
        .auth-footer {
            text-align: center;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid #e2e8f0;
        }
        
        .auth-footer p { color: #4a5568; font-size: 14px; }
        .auth-footer a { color: #667eea; text-decoration: none; font-weight: 600; }
        .auth-footer a:hover { color: #764ba2; text-decoration: underline; }
        
        .alert {
            padding: 14px 16px;
            border-radius: 16px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
            animation: shake 0.5s ease;
        }
        
        .alert i { font-size: 20px; }
        .alert-error { background-color: #fed7d7; border: 1px solid #fc8181; color: #c53030; }
        .alert-success { background-color: #c6f6d5; border: 1px solid #9ae6b4; color: #22543d; }
        
        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }
        
        .back-home {
            display: inline-block;
            margin-top: 20px;
            color: #a0aec0;
            text-decoration: none;
            font-size: 13px;
            transition: color 0.3s;
        }
        
        .back-home:hover { color: #667eea; }
        
        .password-strength-text {
            font-size: 11px;
            margin-top: 5px;
            color: #718096;
        }
        
        @media (max-width: 640px) {
            .card-header { padding: 30px 30px 20px; }
            .card-body { padding: 30px; }
            .logo { width: 60px; height: 60px; }
            .logo i { font-size: 32px; }
            .card-header h1 { font-size: 28px; }
        }