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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 420px;
    padding: 40px;
    animation: slideUp 0.5s ease-out;
}

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

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

.login-header {
    text-align: center;
    margin-bottom: 35px;
}

    .login-header h1 {
        color: #333;
        font-size: 28px;
        font-weight: 600;
        margin-bottom: 8px;
    }

    .login-header p {
        color: #777;
        font-size: 14px;
    }

.form-group {
    margin-bottom: 25px;
    position: relative;
}

    .form-group label {
        display: block;
        color: #555;
        font-size: 14px;
        font-weight: 500;
        margin-bottom: 8px;
    }

    .form-group input[type="text"],
    .form-group input[type="password"] {
        width: 100%;
        padding: 14px 16px;
        border: 2px solid #e0e0e0;
        border-radius: 10px;
        font-size: 15px;
        transition: all 0.3s ease;
        outline: none;
    }

        .form-group input[type="text"]:focus,
        .form-group input[type="password"]:focus {
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

    .form-group .field-validation-error {
        color: #e74c3c;
        font-size: 12px;
        margin-top: 5px;
        display: block;
    }

.password-toggle {
    position: absolute;
    right: 16px;
    top: 42px;
    cursor: pointer;
    color: #999;
    user-select: none;
    font-size: 14px;
}

    .password-toggle:hover {
        color: #667eea;
    }

.captcha-container {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.captcha-image {
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    background: #f9f9f9;
    width: 180px;
    height: 60px;
    object-fit: contain;
    cursor: pointer;
    transition: all 0.3s ease;
}

    .captcha-image:hover {
        border-color: #667eea;
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
    }

.refresh-captcha {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    width: 40px;
    height: 40px;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    flex-shrink: 0;
}

    .refresh-captcha:hover {
        transform: rotate(180deg) scale(1.1);
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.5);
    }

    .refresh-captcha:active {
        transform: rotate(180deg) scale(0.95);
    }

.captcha-input-group input {
    flex: 1;
}

.remember-me {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
}

    .remember-me input[type="checkbox"] {
        width: 18px;
        height: 18px;
        margin-right: 8px;
        cursor: pointer;
    }

    .remember-me label {
        color: #555;
        font-size: 14px;
        cursor: pointer;
        user-select: none;
    }

.validation-summary-errors {
    background-color: #fee;
    border: 1px solid #fcc;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 20px;
}

    .validation-summary-errors ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .validation-summary-errors li {
        color: #e74c3c;
        font-size: 13px;
        margin-bottom: 4px;
    }

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

    .btn-login:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
    }

    .btn-login:active {
        transform: translateY(0);
    }

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

.loading-spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

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

.footer-links {
    text-align: center;
    margin-top: 25px;
}

    .footer-links a {
        color: #667eea;
        text-decoration: none;
        font-size: 14px;
        transition: color 0.3s ease;
    }

        .footer-links a:hover {
            color: #764ba2;
            text-decoration: underline;
        }

.alert {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    animation: slideIn 0.3s ease-out;
}

.alert-danger {
    background-color: #fee;
    border: 1px solid #fcc;
    color: #e74c3c;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }

    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

.security-blocked {
    animation: shake 0.3s ease-in-out;
    border: 2px solid #e74c3c !important;
    box-shadow: 0 0 5px rgba(231, 76, 60, 0.5) !important;
}